FCC ID: OW4-407505 Barrett 4075 high power HF Transmitter

BARRETT Operating and Installation Manual Barrett 4075 High Power HF Transmitter BARRETT 4022 24V POWER SUPPLY/12V 5.0A CHARGER OUTPUT BATTERY ON OVERLOAD CHARGING CHARGED FLOAT BATTERY BACK UP ACTIVE PWR ENT ESC Model: BC407500 and BC407501 BCM407500/4 Barrett Communications Safety Lethal AC and RF voltages are present within the cabinets of the Bar-

rett 4075 solid-state Linear Amplifiers and the Barrett 4075 Power Supply Unit. The proper, safe installation of the Barrett 4075 solid-state Linear Amplifier is not difficult to accomplish if the following guidelines are followed:

All electrical work should be undertaken by a suitably qualified person and in accordance with local bylaws. Use extreme caution when opening the cabinet(s) to perform any alignment or adjustment steps, and take particular care to inspect interconnection cables frequently to ensure that they are in good condition. The Linear Amplifier units are heavy! Proper lifting techniques are recom-

mended when installing the Power Amplifier and Power Supply units. A suitable minimum 3 kVA rated Line Conditioner unit is required to ensure protection for the Power Supply unit against unstable mains supply. Fail-

ure due to mains power fluctuation and no Mains Line Conditioning unit employed will not be considered as a warranty repair. Suitable Lightning Protection and Earth connection is essential to minimize or prevent lightning induced damage of the Linear Amplifier. Barrett Communi-

cations Earthing Kit (P/N BCA207503) is suitable for this purpose. Lightning induced damage is not considered a warranty repair. Approved antennas and minimum separation distance:

Antenna part number Gain

(dBi) PEP

(W) Minimum separation distance (m) BC91203 BC91207 BC91713 BC91202 8 8 8 8 2.1 2.1 8 1000 500 1000 500 1000 500 500 20 14 20 14 11 8 14 Typical Environ-

ment Fixed Fixed Fixed Fixed Fixed Fixed Fixed 3 FCC RF Exposure Compliance Statement The 4075 Linear Amplifiers have been evaluated and comply with the Federal Communications Commission (FCC) RF exposure limits for the General Popula-

tion/Uncontrolled exposure environment. Suppliers Declaration of Conformity Per FCC CFR 47 Part 2 Section 2.1007(a) FCC ID: OW4-407510 (1kW configuration) FCC ID: OW4-407505 (500W configuration) Responsible Party Name: Barrett Communications Address: 47 Discovery Dr, Bibra Lake, Western Australia, 6163 Phone Number: +618 9434 1700 Hereby declares that the product:

Model Name: 4075 Linear Amplifier - 500W, 4075 Linear Amplifier - 1000W conforms to the following regulations:

FCC part 15, subpart B, section 15.107(a), 15.107(d), and section 15.109(a) ____________________________________________________________________ Class A Digital Device As a personal computer peripheral, this device complies with Part 15 of the FCC rules. Operation is subject to the following two conditions:

1. This device may not cause harmful interference, and 2. This device must accept any interference received, including interference that may cause undesired operation. Notice:

This equipment has been tested and found to comply within the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment gener-

ates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense. 4 Notice to Users (FCC) This device complies with Part 15 of the FCC rules per the following conditions:

Changes or modifications made to this device, not expressly approved by Barrett Communications, could void the authority of the user to operate this equipment. 5 6 Contents Safety ............................................................................................................3 SYSTEM OVERVIEW 1 ..........................................................................9 Introduction ..................................................................................................9 Terms and Abbreviations .............................................................................10 System Overview .........................................................................................11 Panels ..........................................................................................................13 INSTALLATION 2 ................................................................................17 Requirements ..............................................................................................17 Rack ............................................................................................................17 Connection to Mains .............................................................................17 Grounding .............................................................................................19 Linear Amplifier ...........................................................................................20 4075 High Power HF Transmitter - Rear Connections .............................21 4075 High Power HF Transmitter - Rear Connections (with ATU) ...........23 Antenna ......................................................................................................26 OPERATION 3 .....................................................................................27 Switching On...............................................................................................27 4050 Antenna Selection ..............................................................................27 Linear Amplifier Settings .............................................................................28 DISPLAY 4 ..........................................................................................29 Status Displays ............................................................................................29 Main Status Display ...............................................................................29 7 Antenna Tuning Unit Status Display .......................................................32 ADVANCED MENUS 5 ........................................................................35 Front Panel Operations and Maintenance Menus ........................................35 Main Menu ............................................................................................35 Service Menu .........................................................................................37 SPECIFICATIONS 6 .............................................................................40 General........................................................................................................40 DC Power Supplies ......................................................................................40 4075 Linear Amplifier ..................................................................................41 1kW ATU .....................................................................................................42 Pin Outs ......................................................................................................44 Power Distribution Unit - Type 1 ..................................................................44 Power Distribution Unit - Types 2 and 3 ......................................................44 4075 Linear Amplifier ..................................................................................45 1kW ATU .....................................................................................................51 Warranty Statement ....................................................................................52 Contact Details ......................................................................................53 8 SYSTEM OVERVIEW 1 Introduction The Barrett 4075 high power HF Transmitter is a compact rack mounted communications solution developed for base station applications in large HF networks. It can be supplied in 1kW and 500 W versions. The transmitter comes as a complete package with an exciter, power supply, power amplifier, interconnecting cables and all required rack mount hardware. The 4075 linear amplifier is designed and engineered for modern communi-

cations which are heavily data orientated, requiring the equipment to work at high duty cycles for extended periods of time. The unique liquid cooled design increases cooling efficiency resulting in less system deterioration due to over-

heating in the power stages, extending overall equipment service life. The compact rack mounted amplifier, together with its power supply occupies just 5U of cabinet space. The Barrett 4075 amplifier natively supports the Barrett 4050 Transceiver/

Exciter which when coupled requires no further tuning or adjustment. A flex-

ible I/O interface and analogue ALC feedback provide the transceiver/exciter full control over final output power. Intelligent electronic controls protect the 4075 from input and output overload while providing a sophisticated early warning and a diagnostic interface for system monitoring and event logging. The 4075 system is field re-programmable via USB allowing the end user to update system software. The Barrett ISO9001 Quality Assurance Program ensures consistent perfor-

mance and the highest reliability. 9 Terms and Abbreviations Term Definition Continuous Wave (used for Morse code) Decibels Decibels relative to the carrier - is the power ratio of a signal to a carrier signal, expressed in decibels. Power ratio in decibels (dB) of the measured power referenced to one milliwatt (mW). Low Pass Filter Organic Light Emitting Diode Peak Envelope Power Press-To-Talk button Selective Calls Single Sideband (a transmission format) Universal Serial Bus Voltage Standing Wave Ration CW dB dBc dBm LPF OLED PEP PTT Selcall SSB USB VSWR 10 4075 HIGH POWER HF TRANSMITTER - SYSTEM OVERVIEW System Overview 4075 High Power HF Transmitter - Front BARRETT 4022 24V POWER SUPPLY/12V 5.0A CHARGER OUTPUT BATTERY ON OVERLOAD CHARGING CHARGED FLOAT BATTERY BACK UP ACTIVE PWR ENT ESC 1 2 3 4 5 11 4075 HIGH POWER HF TRANSMITTER - SYSTEM OVERVIEW Reference Description 1 2 3 4 5 AC Power Distribution Unit 4050 HF SDR Transceiver (left) and 4022 (24V) Power Supply (right) 4075 48V Power Supply 4075 Linear Amplifier ATU Interface Unit (BCA407536) - Optional 12 4075 HIGH POWER HF TRANSMITTER - SYSTEM OVERVIEW Panels AC Power Distribution Unit - Type 1 3 2 1 Reference Description Mains Input Power Isolation ON/OFF switch (shown in the ON config-

uration) 5A Mains output sockets circuit breaker 11A Mains output sockets circuit breaker AC Power Distribution Unit - Type 2 (from July 2021) 1 2 3 4 5 6 7 8 9 Reference Description Mains Input Power Isolation ON/OFF switch (shown in the ON config-

uration) Spare Spare Power Distribution for PSU A Power Distribution for PSU B Power Distribution for PSU C (Spare in 500W configuration) Power Distribution for 4022 3 4 5 6 7 13 4075 HIGH POWER HF TRANSMITTER - SYSTEM OVERVIEW Reference Description 8 9 Spare Spare or Power Distribution for ATU Power Distribution Unit - Type 3 (rear mounted) This PDU is not shown from the front of the rack unit. It will appear as a blanking plate. 4050 HF SDR Transceiver and 4022 24V Power Supply 1 2 Reference Description 4050 On/Off button 4022 On/Off switch For more information concerning the operation of this hardware, please con-

sult the 4050 HF SDR Transceiver Operating Manual (P/N BCM40500) and 4022 24V Power Supply Operating Manual (P/N BCM40220). 4075 DC Power Supplies (1kW configuration) Each power supply can be removed individually by sliding it out from the front of the system. When using a 500W configuration, only two power supplies are required. The additional space will be filled with a blanking plate. 14 4075 Linear Amplifier 4 Reference Description Pwr - indicates if power is supplied to 4075 Linear Amplifier Tx - indicates if in PTT state FLT - the 4075 Linear Amplifier has a fault Log - indicates that the Linear Amplifier has a fault recorded. The log can be cleared through the menus. Power button Micro USB programming interface ATU Interface Box - Optional 1 15 Reference Description ATU Power Switch On/Off An ATU Interface Unit (BCA407536) is required for the 1kW ATU to operate. This ATU Interface Unit provides DC power to the 1kW ATU and also provides a control path from the 4075 Linear Amplifier to the 1kW ATU for tune con-

trol. For further information on the ATU Interface box, please see the 4075 1kW ATU manual (BCM407508). 16 INSTALLATION 2 The new 4075 system is shipped with the Linear Amplifier removed from the rack. All other units are fitted and factory adjusted for optimum operation. All vacant slots are covered. Requirements Housing The ideal housing for the 4075 system is a dedicated radio site in an air-condi-

tioned, secure room connected to mains power. Ideally this room will have its own back-up power source such as solar panels, wind turbines and stand-by batteries. To avoid water ingress and subsequent damage to the system, the racking system should be mounted atop a wooden plinth approximately 4in high. Any vents should not be situated directly near the system to limit condensation reaching the equipment. Cable Management The management of cables will ideally use cable trays to minimise the risk of damage and reduce maintenance. Take care to note the bend radius of the cables. Over-bending a cable can result in shorting. Ideally, power and data cables should be kept separately and cables should not cross, except at 90o where absolutely necessary. Rack Ensure that the rack is positioned with enough space for the front and rear of the system to be accessed safely. Local fire safety guidelines should be adhered to. Connection to Mains Once the rack is located in its final position and secured to the floor, unwrap the internally fitted mains cable and feed it out of the cabinet either at the bottom or through the top cable access point and connect to a suitable mains source. The 4075 high power transmitter systems are usually built into either the 20RU or 39RU racks. Each system includes an AC power distribution box BCA407520. Connection of mains power into this box is via a six metre long 17 mains cable which is directly terminated into the AC power distribution box. The other end of this cable is left unterminated for hard wire connection to a customers mains supply through a suitable high current termination. This termination should be performed by a suitably qualified electrician. Barrett Communications recommend that a dedicated RCD is used in this circuit. Please note that the peak current drawn by the 4075 system exceeds normal wall socket ratings and so connection through a wall socket is not safe and should be avoided. According to Australian / New Zealand Standards, the mains cable conductor colour code is as follows:

Conductor colour Designation Brown Blue Green/Yellow Active Neutral Earth 18 4075 HIGH POWER HF TRANSMITTER - INSTALLATION Grounding The ground (earth) system is a key part of the overall system and consequently of the system performance. An inadequate ground system is the primary cause of poor system performance, noise and lightning damage. When an ATU is fitted, the system ground will include a ground counterpoise which is essential for ATU tuning performance. Base Station Grounding The following major aspects should be considered when installing a land based station grounding system:

Rack and equipment ground with respect to the mains supply and personnel safety is paramount. The installation of all electrical equipment should be in accordance with local bylaws, and grounding is a requirement for effective earth leakage protection. Grounding with respect to EMI (Electro Magnetic Interference):

Due to the high RF fields in the proximity of the transmitter rack, shielding of all equipment and cables is important. Each Rack Mounted main item is connected to the rack vertical ground strip via flexible straps. The supplied system rack and cables have been adequately shielded. The ground point for external connection can be found at the rear bottom of the rack. The rack earth connection should be extended, as directly as possible, to a suitable ground, outside of the building, using preferably, a 50 mm copper earth strap. All signal cables should be shielded and grounded at each end. Lightning Protection Lightning protection also requires a good ground connection and should be similarly connected to the building ground. The lightning protection should ideally be located where the coaxial cables enter the building, and coupled to ground as directly as possible. 19 4075 HIGH POWER HF TRANSMITTER - INSTALLATION Linear Amplifier Unless otherwise specified for special project requirements, all cabling with the exception of the coaxial RF output cable, are installed in the rack and so identification and connection is straightforward. Both the 4075 Linear Amplifier and the 4075 Power Supply units have been factory adjusted for optimum performance. CAUTION: Linear Amplifiers weigh between 30kg (500W configu-

ration) and 35kg (1kW configuration). Two people are required to safely lift and install the Linear Amplifier. The rack has two guide rails that will support the Linear Amplifier once installed. Each side of the Linear has a corresponding channel the slide over the guide rails. 1. Slide the Linear Amplifier into position and secure with the screws pro-

vided. 2. Connect cables as per the diagram on the following page. 20 4075 HIGH POWER HF TRANSMITTER - INSTALLATION 4075 High Power HF Transmitter - Rear Connections A c b a 2 6 9 C 5 4 3 1 ACTIVE (BROWN) NEUTRAL (BLUE) EARTH(GREEN YELLOW) B 7 C 8 10 11 13 D E a b c 12 21 4075 HIGH POWER HF TRANSMITTER - INSTALLATION AC Power Distribution Unit (P/N BCA407520) Barrett 4050 HF SDR Transceiver (P/N BC405000) with Fan attachment

(BCA40002) 4022 24V HF Power Supply (P/N BC402201) 4075 Power Supply Unit (P/N 407502) 4075 Linear Amplifier (1kW P/N BC407501, 500W P/N BC407500) Mains Power Cable 10A IEC cable (P/N CA-16571) 10A IEC cable (P/N CA-16571) (a) 10A IEC cable (P/N CA-16571) (b) 10A IEC cable (P/N CA-16571) - 1kW configuration only (P/N CA-16571)

(c) DC Power Cable to 4050 (P/N SA-42020) Coaxial cable RG58 (P/N BCA90028 UHF) or (P/N BCA90066 N-type) 4050 to Linear Amplifier control cable (P/N BCA40027) Speaker Cable (P/N SA-45010) 4075 Power Supply Control Cable (P/N SA-475105) High Current 48V DC cable (P/N SA-47534) 13.8 V DC Power Cable to Linear Amplifier (P/N SA-47538) Coaxial RG213 (min) cable to antenna A B C D E 1 22 4075 HIGH POWER HF TRANSMITTER - INSTALLATION 4075 High Power HF Transmitter - Rear Connections (with ATU) abc A 5 4 3 1 ACTIVE (BROWN) NEUTRAL (BLUE) EARTH(GREEN YELLOW) 2 6 9 C 10 B 7 C 8 11 D E a b c 13 14 16 15 C G 19 F H 12 17 18 I 23 4075 HIGH POWER HF TRANSMITTER - INSTALLATION AC Power Distribution Unit (P/N BCA407520) Barrett 4050 HF SDR Transceiver (P/N BC405000) with Fan attachment

(BCA40002) 4022 24V HF Power Supply (P/N BC402201) 4075 Power Supply Unit (P/N BC407502) 4075 Linear Amplifier (1kW P/N BC407501, 500W P/N BC407500) ATU Interface Unit (P/N BCA407536) 1kW ATU (P/N BC407508) Antenna Counterpoise (P/N BCA407550) Mains Power Cable 10A IEC cable (P/N CA-16571) 10A IEC cable (P/N CA-16571) (a) 10A IEC cable (P/N CA-16571) (b) 10A IEC cable (P/N CA-16571) - 1kW configuration only (P/N CA-16571)

(c) DC Power Cable to 4050 (P/N SA-42020) Coaxial cable RG58 (P/N BCA90028 UHF) or (P/N BCA90066 N-type) 4050 to Linear Amplifier control cable (P/N BCA40027) Speaker Cable (P/N SA-45010) 4075 Power Supply Control Cable (P/N SA-475105) High Current 48V DC cable (P/N SA-47534) 13.8 V DC Power Cable to Linear Amplifier (P/N SA-47538) A B C D E F G H I 1 24 4075 HIGH POWER HF TRANSMITTER - INSTALLATION 10A IEC cable (P/N CA-16571) 4075 Linear Amplifier to ATU Interface cable (P/N SA-20767) ATU Interface to ATU cable (P/N SA-20767) Coaxial RG213 (min) cable to ATU High Voltage Antenna Feeder Cable Ground (earth) cable Ground (earth) cable 14 15 16 17 18 19 25 4075 HIGH POWER HF TRANSMITTER - INSTALLATION Antenna Please refer to the instruction guide supplied with the antenna type selected. All antennas connect to the Linear Amplifier via the coaxial socket on the left of the rear panel. This is clearly labelled to avoid confusion. Please note that a VSWR of < 2:1 is desirable for optimum performance of the Linear Amplifier. We suggest that for high power transmitters, a type RG-213 or better cable is used for all coaxial feeds beyond the Linear Amplifier. For improved coaxial feeder performance over long runs, we suggest the use of a low-loss coaxial cable. Please contact Barrett Communications if further assistance with cable selection is required. The use of a lightning protection module is recom-

mended. Grounding When an unbalanced antenna or an ATU is used, the antenna ground, or counterpoise is vitally important. Providing an adequate counterpoise at ground level is difficult, but it is far more difficult when the ATU is placed on a roof top. At ground level, the use of 8 to 12 radial wires of 16 gauge or larger, each of about 1/3 longer than the length of the antenna, buried to about 150 mm below the surface should be adequate (Radial earth mat / ground plane:

Barrett P/N BCA20026). Connection to metal water pipes can also improve the ground. On a roof top, there is usually not enough space for an adequate counterpoise. An effective counterpoise may be achieved by covering the entire roof surface below the antenna with wire mesh which is then con-

nected to the ground as directly as possible. It must be noted however, that the successful tuning of the ATU and the resulting VSWR performance of the antenna, will greatly depend on the effectiveness of the counterpoise pro-

vided. 26 4075 HIGH POWER HF TRANSMITTER - INSTALLATION OPERATION 3 Switching On 1. Once connected to Mains power turn the circuit breakers (if fitted) on the rear of the AC power distribution unit (PDU) to the on position. 2. Turn the mains switch on the front of the PDU panel to the on position if using a type 1 or 2 PDU. Ensure the other front switches are set to the on position as required if using a type 2 PDU. If the 4022 Power Supply, 4050 HF SDR Transceiver and the 4075 Linear Ampli-

fier do not also switch on, follow the steps below:

3. Flip the back and front switches on the 4022 Power Supply. 4. Press the On-Vol knob on the 4050 transceiver 5. Press the Pwr button on the Linear Amplifier. Settings I/O 4050 Antenna Selection Before any operation is under-

taken an antenna type needs to be selected from Settings < IO in the 4050. 1. Open the IO menu from Set-

tings on the swipe screen. 2. Tap Antenna 1 Type from the IO screen to display the Antenna 1 Type screen. 3. Navigate to 4075 Linear and 4075 Linear with ATU options by either swiping down on the touch screen or pressing on the keypad. 4. Select the appropriate option. 27 If 4075 not detected appears on the transceiver display (see right) ensure that the following are not responsible before contacting Bar-

rett Communications:

All cable connections are cor-

rect and that none are loose or disconnected Check that the Linear is switched on Linear Amplifier Settings The 4075 Linear Amplifier is programmed and set up before it is shipped so no further actions are necessary. 28 4075 HIGH POWER HF TRANSMITTER - OPERATION DISPLAY 4 This chapter provides a guide to the various status displays that may appear during 4075 operation. NOTE: The backlight will turn off after 1 minute of inactivity. Any activ-

ity, including key presses, transmission or error state, will reawaken the backlight. Status Displays Use the up and down keys to move between the different status screens. Main Status Display Receive Mode Power:

VSWR:

Current: 0.03 A 0 W 0.00 Transmit Mode Power:

VSWR:

Current: 37.31 A 1043 W 1.6 29 Current Error Information This display provides a brief indication of any fault conditions currently pres-

ent in the system. Current Error Information Actv. WARN: NO ERROR Actv. ERR : NO ERROR Actv. CRIT: NO ERROR Last Error Information This display provides a brief indication of any fault conditions most recently present in the system. Last Error Information Actv. WARN: NO ERROR Actv. ERR : NO ERROR Actv. CRIT: NO ERROR Detailed Status Screens Radio: 4050 Cur0: N/A ATU: None Cur1: 0.03 A Band: 7 Volt.: 48.1 V Pal1T: 28.3oC ATTEN: 6dB-3db App:2.3R-2.45R Pal0T: N/A 30 4075 HIGH POWER HF TRANSMITTER - DISPLAY AmbT: 28oC Pump: OK Fan0: OK Fan1: OK Fan2: OK Fan3: OK Label Radio ATU Band Volt ATTEN Cur0 Cur1 Pal0T Pal1T App AmbT Pump Fan0-3 Indication The radio connected to the system Whether an Antenna Tuning Unit is connected to the Linear Amplifier Low Pass Filter Band The voltage supplied by the Linear Amplifier power supply Attenuation setting Current drawn by Pallet 0 (only in 1kW configuration) Current drawn by Pallet 1 Pallet 0 Temperature Pallett 1 Temperature Firmware version number System ambient temperature Pump activation Fan functionality 31 4075 HIGH POWER HF TRANSMITTER - DISPLAY Antenna Tuning Unit Status Display This is only present if an Antenna Tuning Unit (ATU) is connected to the sys-

tem. No Tuner If no ATU is connected to the system, the status menu will remain unchanged

(see Receive Mode). Unknown Tuner If an active device is connected to the 4075 Linear Amplifiers ATU interface but the Linear has not been configured for an ATU, the following screen will display:

Power:

VSWR:

Current: 0.03 A 0 W 0.00 UNKNOWN In this state the Linear will not operate when the transceiver begins to trans-

mit. It will signal a fault to the 4050 transceiver and it will keep the Linear in bypass mode in order to protect whatever is connected and it will display the error message. Missing Tuner If the Linear settings have been set for an ATU and there is either nothing con-

nected to the ATU interface or the connected ATU controller is not powered on then the following screen is displayed:

Power:

VSWR:

Current: 0.03 A 0 W 0.00 MISSING As with the Unknown Tuner, if the 4050 transceiver attempts to activate the amplifier with a Missing Tuner, a fault is generated. 32 4075 HIGH POWER HF TRANSMITTER - DISPLAY Scan Mode When the 4050 Transceiver is scanning or a manual channel change occurs, the transceiver signals scan mode to the amplifier and the following screen is displayed:

Power:

VSWR:

Current: 0.03 A 0 W 0.00 SCAN Tuning Mode When the 4050 Transceiver requests a tune cycle, the amplifier displays the following while the tune process is under way. Please note that a tune cycle can take up to two (2) minutes to complete. Power:

VSWR:

Current: 0.03 A 0 W 0.00 TUNING Tuned Mode If the tune cycle is successful, the amplifier displays the following. Power:

VSWR:

Current: 0.03 A 0 W 0.00 TUNED 33 4075 HIGH POWER HF TRANSMITTER - DISPLAY Untuned Mode From the untuned mode, the amplifier can change to either scan mode or tuning mode in response to the operation of the radio. It will move to scan mode if the 4050 changes channel or tuning mode if the operator or con-

trolling system issues a manual tune command. Power:

VSWR:

Current: 0.03 A 0 W 0.00 UNTUNED As with the Unknown Tuner and Missing Tuner modes, if the 4050 Trans-

ceiver attempts to operate the amplifier when Untuned, the amplifier signals a fault to the 4050, displays the following screen and engages the bypass mode so that the RF output of the 4050 is not amplified in order to protect the attached tuner. Error Condition ERROR!-In Bypass PTT Untuned ERROR Hit ESC to continue This error condition remains until the transceiver stops activating the amplifi-

ers PTT line, and then clears automatically when the PTT is released. 34 4075 HIGH POWER HF TRANSMITTER - DISPLAY ADVANCED MENUS 5 Front Panel Operations and Maintenance Menus The front panel provides menus that access and control the linear settings. These should only be accessed by qualified trained technicians and are not usually accessed in the normal operation of the linear. Access the menus by pressing the ESC key and using the navigation up and down keys to select the function or setting desired. Main Menu After pressing the ESC key the 4075 shows the Main Menu. MAIN MENU 1 - Configuraton Menu 2 - Service Menu Use the navigation keys to select the desired menu and then press the ENT key. Configuration Menu LINEAR CONFIG MENU 1 - Exciter 2 - ATU 3 - Buzzer Control Use the navigation keys to select the desired sub-menu and then press the ENT key. 35 Exciter Menu The Exciter Menu selects the model of transceiver being used to drive the Linear. There are two choices. EXCITER MENU 1 - Set 4050 2 - Set 2050 ATU Menu Use this menu to set the type of ATU. If the system is not using an Antenna Tuner, select No ATU. ATU MENU 1 - Set No ATU 2 - Set 407508 Buzzer Control Menu This menu controls the operation of the audible buzzer when error conditions are present. Select ON or OFF by using the left and right navigational keys, then press ENT to save the new setting, or ESC to leave the setting unchanged. Buzzer:

ON 36 4075 HIGH POWER HF TRANSMITTER - ADVANCED MENUS Service Menu From the Main Menu select the Service Menu item and press ENT. MAIN MENU 1 - Configuraton Menu 2 - Service Menu A four-digit key will be requested. Please contact Barrett Communications for this access key. Passcode:

0000 Use the UP and DOWN navigational keys to select the digit value and the LEFT and RIGHT navigational keys to select the digit being set. Once done, press ENT and the following warning will display:

WARNING:

Incorrect usage may damage amplifier After the warning has been displayed for 2 seconds, the Service Menu will display. 37 4075 HIGH POWER HF TRANSMITTER - ADVANCED MENUS SERVICE MENU 1 - Clear Critical Error 2 - Attenuation Control 3 - ALC Trim Clear Critical Error Selecting this entry and then pressing the ENT key clears any current critical error. Attenuation Control This menu sets the inline attenuation of the of the RF input, ranging from no attenuation 0dB to a maximum of 19dB. The current setting is shown on the bottom of the screen. Use the UP and DOWN navigational keys to select the required attenuation, and then press ENT to set the new value or ESC to leave the attenuation setting unchanged.

> ATTENUATION CONTROL MENU 1 -Set 0dB Attenuation 2 -Set 3dB Attenuation 3 -Set 6dB Attenuation ATTN: ATTEN_6DB 38 4075 HIGH POWER HF TRANSMITTER - ADVANCED MENUS ALC Trim This menu allows the adjustment of the ALC level used to signal power level to the transceiver. This setting is normally adjusted in the factory during the manufacturing process and does not normally require changes in the field. Altering this value inappropriately may result in permanent damage to the amplifier. The procedure for use of this adjustment is beyond the scope of this manual. Selecting the ALC Trim function from the Service Menu displays the following screen. ALC TRIM level: 41 ENT to save value ESC to exit without saving Use the UP and DOWN navigational keys to change the value which ranges from 0 to 63. Press ENT to save the new value or ESC to exit without changing the setting value. 39 4075 HIGH POWER HF TRANSMITTER - ADVANCED MENUS SPECIFICATIONS 6 General Frequency coverage 1.5MHz to 30MHz (reduced performance below 1.6MHz) Power output 1000W PEP or 500W PEP 1.5dB Duty cycle Exciter 100%, Continuous PEP, CW 4050 HF SDR transceiver DC Power Supplies DC Voltage Output 48V (Nominal) Rated Current Current Range Rated Power 21A 0-21A 1008W Input Voltage Range 90-264 VAC, 127-370 VDC AC Current (Input) (typ.) 11 A / 115 VAC, 5.5 A / 230 VAC Overload Protection 105-125% rated output power, constant current limiting, recovers automatically after fault condition is removed. Overvoltage protection 52.8 - 64.8V, shut down o/p voltage, re-power to recover Over temperature pro-

tection Shut down o/p voltage, recovers automatically after fault condition is removed. Working temp

-20 to +60oC Working Humidity 20-90% RH non-condensing Storage temp, humidity

-40 to +85oC, 10-95% RH non-condensing 40 Dimensions (L x W x H) 350.8mm x 483.6mm x 44mm Connectors 1x DB-25 female 3x Standard IEC sockets Positive and negative terminals 4075 Linear Amplifier Power Output CW 1kW or 500W 1.5 dB Power Gain

+24 dB Harmonics & Spurious Less than -55 dB ALC Voltage (output) Filter Type Dimensions 0 ~ 3V 7 Band LPF 178H x 482W x 480D mm (excluding handles and I/O connectors) Power Requirements 58V DC (Nominal) @ 60A, 12-24V DC @ 5 A max Rack Height Weight Cooling Temperature Humidity Altitude 4RU, 19 Rack mount (Amplifier and 50V power supply only) 35 kg (77 lbs) Liquid cooled, Water, Propylene Glycol mixture

-20C to +50C operational,

-40C to +85C storage 95% relative, non condensing 3000 m above sea level (not airborne), 9000 m transportation Output VSWR protection 3:1 nominal all magnitude and phases Thermal Overload protection 85C Fault Log Standards System events and error reporting FCC Part 87 Mil Std 810G 41 4075 HIGH POWER HF TRANSMITTER - SPECIFICATIONS 1kW ATU Frequency Range Wire (23-46m): 2 - 30 MHz Duty Cycle VSWR Tune Modes Tune Time Whip (10 m): 2 - 30 MHz Whip (5 m): 3 - 30 MHz 100% Duty Cycle Voice and Data Better than 1.5:1 when tuned Fully Automatic and Memory First tune: 5 secs (typical) From Memory: 500 mSec (typical) Tune Power 40 W nominal, 50 W max Memory addresses Unlimited Protection Open circuit antenna Short circuit antenna Over temperature High VSWR Voltage transients 1 kW PEP and Average

+13.8 V DC (derived from ATU Interface Unit via the ATU Interface Unit to 1 kW ATU cable) Power Rating Supply Voltage Supply Current Tuned 400 mA (typical) Tuning - <800 mA Auxiliary Receive Anten-

na Power 12 V 1 A Antenna Impedance 50 ohm unbalanced Weight Dimensions Temperature Construction 25 kg 350 mm (h) x 380 mm (w) x 330 mm (d) Operational: -20oC to +55oC Aluminum with marine grade paint 42 4075 HIGH POWER HF TRANSMITTER - SPECIFICATIONS Connectors RF: N-type socket Tune Control: 10 Pin Mil Circular Connector Antenna: TNC 43 4075 HIGH POWER HF TRANSMITTER - SPECIFICATIONS Pin Outs Power Distribution Unit - Type 1 1 2 Designation Rating 1 2 5A 10A 1 2 Designation Polarity Cable Colour 1 2 3 Active Brown Neutral Blue Earth Green/Yellow 3 Power Distribution Unit - Types 2 and 3 All outlets are 10A IEC C13 sockets as above. 44 4075 HIGH POWER HF TRANSMITTER - SPECIFICATIONS 4075 Linear Amplifier Reference Description RF Out (N-type connector) 48V DC In (Anderson connector) Ground (Earth) Coolant drain plug 48 V Power Supply Control ATU Control Micro-USB AUX Control 4050 Interface 2050 Interface 12-24V DC In RF In (UHF or N-type connector) 45 4075 HIGH POWER HF TRANSMITTER - SPECIFICATIONS 48 V Power Supply Pin ACOKA DCOKA TMPALMA ONOFFA GND ACOKB DCOKB TMPALMB ONOFFB

+SENSE ACOKC DCOKC TMPALMC ONOFFC

-SENSE ATU Control Pin V+

RS485A RS485B Strobe GND INIT CHKTUNE TUNED Reserved 46 4075 HIGH POWER HF TRANSMITTER - SPECIFICATIONS Auxiliary Pin Voltage +

IO0 IO1 IO2 GND IO3 IO4 IO5 ALC 4050 Interface Pin Voltage +

TXD RXD PTT GND Tune Scan Tuned ALC 47 4075 HIGH POWER HF TRANSMITTER - SPECIFICATIONS 2050 Control Pin Voltage +

ALC DATA CLOCK GND PTT TUNED STROBE FAULT Reserved SCAN TUNE Reserved Reserved Reserved 12-24 V DC IN Pin Voltage IN Spare GND 48 4075 HIGH POWER HF TRANSMITTER - SPECIFICATIONS ATU Interface Unit 15 Pin ATU Interface Unit to 1 kW ATU Connector 78 6 5 4 3 2 1 Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 15 14 13 12 11 10 9 Function GND 485Data-

SCAN TUNED TUNE IO

AC2-+VE 485Data+

ScanAltAnt AltAnt+24V on Colour BK OR WH BR SL

LtGN-BL PK

YE VI AC1-GND GN-R

49 4075 HIGH POWER HF TRANSMITTER - SPECIFICATIONS 9 Pin ATU Interface Unit to 4075 Linear Amplifier connector 1 2 3 4 5 6 7 8 9 Pin 1 2 3 4 5 6 7 8 9 Description ATU V+

ATU Data ATU Clock ATU Strobe GND ATU Init ATU Chk Tune ATU Tuned GND Note:

This connector is pin-for-pin the Linear Amplifier 9 pin connector. IEC AC Power Connector This connector is a standard IEC 3 pin connector. 50 4075 HIGH POWER HF TRANSMITTER - SPECIFICATIONS 1kW ATU ATU 10 Pin Mil Circular Control Connector C H G F A K B D E J Pin Function Colour A B C D E F G H J K GND SCAN TUNED ScanAltAnt AC1-GND AC2-+VE AltAnt+24V on TUNE IO 485Data-

485Data+

BK WH BR YE GN-R LtGN-BL VI SL OR PK 51 4075 HIGH POWER HF TRANSMITTER - SPECIFICATIONS Warranty Statement Barrett Communications (hereafter referred to as Seller) provides a three

(3) year warranty on all Barrett products from the date of shipment from the Seller. A one (1) year warranty from the date of shipment from the Seller is provided for all batteries. Each warranty guarantees acceptable performance of the product under normal recommended conditions for the duration of the warranty period. In cases of accident, abuse, incorrect installation or maintenance by a non-Seller representative, subjection to abnormal environmental conditions, negligence or use other than those in accordance with instructions issued by the Seller, the warranty shall be voided. In addition, this warranty shall not cover low performance specifically the distance or quality of transmission and recep-

tion - due to unfavourable environmental or locational conditions. Nor shall this warranty cover the quality of transmission and reception of transceivers mounted in vehicles or vessels that have not been sufficiently electrically sup-

pressed. Should any fault due to bad design, workmanship or materials be proven at any time within the warranty period, the Seller will rectify such fault free of charge provided that the equipment is returned, freight paid, to Barrett Communications Pty Ltd head office or to an authorised service centre. The repaired or replaced product will remain covered under and throughout the term of the original warranty period up to its expiration. No repair or replace-

ment will extend the warranty term past the original thirty-six (36) month anniversary of the original date of shipment from the Seller. Firmware and software (pre-installed, stand-alone or provided as an update), hereafter referred to as Software, is guaranteed to perform acceptably within the specifications provided by the Seller, provided that the Software is within the warranty period. Should Software not perform acceptably, the Seller will use all commercially reasonable efforts to correct such nonconformity as reported to the Seller directly or via a support representative. The Seller is not obliged to update Software under warranty if the nonconformity is caused by a) the use or operation of the Software in an environment other than intended or recom-

mended by the Seller in relevant documentation, or b) modifications made to the Software not authorised or undertaken by the Seller or a representative of said Seller. Subject to the matters set out in this warranty, no liability, expressed or implied is accepted for any consequential loss, damage or injury arising as a result of a fault in the equipment and, all expressed or implied warranties as to quality or fitness for any purpose are hereby excluded. This warranty does not extend to products supplied by the Seller which are not designed or manufactured by it. The Seller will however make every 52 endeavour to ensure that the purchaser receives full benefit on any warranty given by the original equipment manufacturer. This warranty is restricted to the original purchaser except where the original purchaser is a reseller authorised by the Seller who has purchased for the pur-

pose of resale, warranty shall be extended to the resellers customer. Contact Details Our customer / dealer technical support department can be contacted via land mail, email, telephone or via support ticket on the technical support web page. https://www.barrettcommunications.com.au/support/

Barrett Communications Pty Ltd Head Office:

PO Box 1214, Bibra Lake WA 6965 AUSTRALIA Toll Free Tel: 1800 999 580 (Within Australia) Tel: +618 9434 1700 Fax: +618 9418 6757 email: support@barrettcommunications.com.au Telephone support from the Australian office is available from 7:30 am to 4:00 pm local time Monday to Friday. Barrett Communications Europe:

Unit 9, Fulcrum 2 Victory Park, Solent Way, Whiteley Hampshire PO15 7FN United Kingdom Tel: +44 (0) 1489 880 332 Fax: +44 (0) 1489 565 422 email: support@barrettcommunications.co.uk Telephone support from the UK office is available from 8:30 am to 5:00 pm local time Monday to Friday. Barrett Communications Corporation USA:

190 Office Park Way Pittsford, N.Y. 14534 Tel: +1 585 582 6134 E-Mail: support@barrettusa.com Telephone support from the USA support office is available from 8:30 am to 5:00 pm local time Monday to Friday. 53 AUSTRALIA

(Head office and Manufacturing) Barrett Communications Pty Ltd 47 Discovery Drive, Bibra Lake, WA 6163 Australia Tel: +61 8 9434 1700 Email: info@barrettcomms.com UK

(European office) Barrett Communications - Europe Unit 9, Fulcrum 2, Solent Way, Whiteley, Hampshire, PO15 7FN United Kingdom Tel: +44 (0) 1489 880 332 Email: uksales@barrettcommunications.co.uk USA

(US office and Manufacturing) Barrett Communications USA Corp 190 Office Parkway, Pittsford, NY 14534 United States of America Tel: +1 585 582 6134 Email: sales@barrettusa.com

Applicant: Barrett Communications Pty Ltd FCC ID: OW4-407505 EXHIBIT 1 IDENTIFICATION LABEL

(Pursuant to FCC Part 2.1033(c)(11), 2.1033(b)(7)) MARKINGS (TEXT) X See Exhibit 3 for the actual location of the FCC/IC label on the device. X Label Attached Below. EXHIBIT 1 Template Revision 4 (29 Aug 2023) SHEET 1 OF 4 Applicant: Barrett Communications Pty Ltd FCC ID: OW4-407505 Figure 1 - FCC Label Position EXHIBIT 1 Template Revision 4 (29 Aug 2023) SHEET 2 OF 4 Applicant: Barrett Communications Pty Ltd FCC ID: OW4-407505 Figure 2 - FCC Label for BC407500 500 W model Figure 3 RF Exposure Warning Label EXHIBIT 1 Template Revision 4 (29 Aug 2023) SHEET 3 OF 4 Applicant: Barrett Communications Pty Ltd FCC ID: OW4-407505 Figure 4 RF Exposure Warning Label Position

*** END ***

EXHIBIT 1 Template Revision 4 (29 Aug 2023) SHEET 4 OF 4

Applicant: Barrett Communications Pty Ltd FCC ID: OW4-407505 Date: November 13, 2023 Declaration Office of Engineering and Technology Laboratory Division Equipment Authorization Branch Federal Communications Commission Laboratory 7435 Oakland Mills Road Columbia, MD 21046 To whom it may concern, Please be notified that we, David Archer, have designated Spencer Zhong of Nemko Canada, Inc. being responsible and to act as our agent in all matters relating to applications for equipment authorization, including the signing of all documents relating to these matters. Any and all acts carried out in their professional capacity by Spencer Zhong of Nemko Canada, Inc. in connection with all processes required for FCC approval and any communication needed with the national authority, shall have the same legal authority as acts on our own behalf. We further certify that neither the applicant nor any party to this application, as defined in 47 CFR Ch. 1.2002 (b), is subject to a denial to Federal benefits, that include FCC benefits, pursuant to section 5301 of the Anti-Drug Abuse Act of 1998, 21 U.S.C. 862. This authorization is limited to the following product, and shall remain in place until completion of the certification, or until revoked, whichever is earlier:

FCC ID: OW4-407505 If you have any acknowledgement and response, please send it to Nemko Canada, Inc. directly. Should you have any questions or comments regarding this matter, please dont hesitate to contact me. Dated this 13th Day of November 2023 By:

Signature David Archer Printed Title:

Technical Manager Telephone:

+618 9434 1700 On behalf of:

Barrett Communications Pty Ltd

Applicant: Barrett Communications Pty Ltd FCC ID: OW4-407505 CONFIDENTIALITY REQUEST November 10, 2023 Office of Engineering and Technology Laboratory Division Equipment Authorization Branch FCC Laboratory 7435 Oakland Mills Road Columbia, MD 21046 Subject:

Request for Permanent Confidentiality for Transceiver with FCC ID: OW4-407505 Pursuant to 47 CFR Section 0.457(d),0.459 and Section 552(b)(4) of the Freedom of Information Act , we hereby request that the following exhibits be held confidential:

Schematics Exhibit 5 Block diagram Exhibit 4 Parts List and Tune Up Procedures Exhibit 10 Operational description Exhibit 12 These materials contain trade secrets and proprietary information and are not customarily released to the public. The public disclosure of this information might be harmful to the company and provide unjustified benefits to our competitors. Please mark Exhibits 4, 5, 10, and 12 as Confidential. Dated: November 10, 2023 Signed:

Printed name: David Archer Title: Technical Manager EXHIBIT 13b(i) Revision 1 (02 August 2022) SHEET 1 OF 1

Applicant: Barrett Communications Pty Ltd FCC ID: OW4-407505 November 13, 2023 Office of Engineering and Technology Laboratory Division Equipment Authorization Branch FCC Laboratory 7435 Oakland Mills Road Columbia, MD 21046 Subject: Application for New Filing Certification of Transmitter with FCC ID: OW4-407505 Dear Sir/Madam, Barrett Communications Pty Ltd (47 Discovery Drive, Bibra Lake, Perth, Western Australia) herein submits application for Certification of the subject transmitter. This transmitter is intended for use in a radio application with capabilities for clear and coded communications with a variable transmit power operating within the following frequency ranges:

Product Name Model Numbers Frequency Range RF Power 4075 Linear Amplifier 500W BC407500 1.5 MHz 30 MHz 500 W 1.5 dB

(Max declared) FCC Rules Part 87 We are requesting certification under Part(s) of the Commissions Rules listed above to allow operation of this equipment. EXHIBIT 13A Revision 3 (9 Sept 2022) SHEET 1 OF 2 Applicant: Barrett Communications Pty Ltd FCC ID: OW4-407505 Barrett Communications Pty Ltd hereby certify that all 4075 HF High Power Transmitter packages bearing the FCC logo will contain a software region lock that will prevent the product being used in a manner contrary to that allowed by FCC Part 87 rules. This software region lock will restrict modification of the following Software definable RF parameters:

1. AGC Attack/Gain: are not modifiable. 2. Modulation Types: are factory programmable only and are limited to the certified emissions. 3. Output Power: is factory programmable only. 4. Transmit Frequencies: are factory programmable only and are restricted to licensed frequencies in the range of 1.5 MHz and 30 MHz. All FCC 4075 HF High Power Transmitter packages are shipped from the factory pre-programmed with only authorized frequencies and are not modifiable by end users. The 4075 HF High Power Transmitter is only supplied by authorized dealers who program the radios frequencies to ensure that frequencies are restricted to only those licensed to the end-user. Barrett Communications Pty Ltd also requests that the FCC certify this product for the entire 1.5 MHz to 30 MHz band to meet the requirements of users authorized to operate between 1.5 MHz and 2.0 MHz as allowed by Title 47 CFR 2.106. A complete Certification application is enclosed. If you require any additional information, please contact me at (+618) 9434 1700. Dated: November 13, 2023 Signed:

Printed name: David Archer Title: Technical Manager EXHIBIT 13A Revision 3 (9 Sept 2022) SHEET 2 OF 2

Applicant: Barrett Communications Pty Ltd FCC ID: OW4-407505 Covered Equipment Certification Attestation Letter November 10, 2023 Office of Engineering and Technology Laboratory Division Equipment Authorization Branch Federal Communications Commission Laboratory 7435 Oakland Mills Road Columbia, MD 21046 ATTN.: Reviewing Engineer FCC ID: OW4-407505 Barrett Communications (the applicant) certifies that the equipment for which authorization is sought is not covered equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. Note: If the equipment for which the applicant seeks authorization is produced by any of the entities identified on the current Covered List, the applicant should include an explanation on why the equipment is not covered equipment. Barrett Communications (the applicant) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List as an entity producing covered equipment. Signed:

Printed name:

Title:

Company Name:

Date:

David Archer Technical Manager Barrett Communications 11/10/2023

Applicant: Barrett Communications Pty Ltd FCC ID: OW4-407505 10th November 2023 Authorization & Evaluation Division Federal Communications Commission Laboratory 7435 Oakland Mills Road Columbia, MD 21046 Subject: Extended Frequencies Justification for Certification of Transmitter with FCC ID: OW4-407505. Dear Sir/Madam:

This transmitter is designed to operate in the frequency ranges as described in the Exhibit 13a. Barrett Communications Pty Ltd also requests that the FCC certify this product for the entire 1.5MHz to 30MHz band to meet the requirements of users authorized to operate between 1.5MHz and 2.0MHz as allowed by Title 47 CFR 2.106. This would be done to facilitate the requirements of agencies covered under NTIA spectrum usage. Government agencies complying with the NTIA instead of the FCC must purchase their equipment from private industry manufacturers who are governed under FCC rules. The conflict in spectrum allocation detracts from the options available to the government agencies for commercial off the shelf equipment which meets their required specifications such as the Department of Interiors. Please see frequency lists below. The following table lists the CFR 47 Part 87 frequencies for a MF/HF Fixed station transceiver:

2.1735 - 2.1905 MHZ 2.505 3.025 MHz 3.230 3.500 MHZ 4.063 4.438 MHz 4.488 4.700 MHz 4.85 4.995 MHz 5.005 5.25 MHZ 5.275 5.68 MHz 5.73 5.90 MHZ 6.525 6.685 MHz 7.45 8.10 MHz 8.195 8.965 MHz 10.005 10.10 MHz 11.275 11.400 MHz 13.260 13.360 MHz 17.900 17.970 MHz 21.85 22.000 MHz The CFR 47 Part 87 extended" frequencies are:

Frequency

(MHz) 1.5 1.605 1.8 2.0 2.107 2.17 2194 - 2495 3.155 - 3.230 4.438 - 4.488 4.995 - 5.005 FCC Rule Part(s) Frequency

(MHz) FCC Rule Part(s) Frequency

(MHz) FCC Rule Part(s) 73, 90 1.605 1.705 73, 80, 90 1.705 1.8 80, 90 80, 97 80, 90 80, 90 80, 90 80, 90 2.0 2.065 2.17 2.1735 80, 90 80 2.495 - 2.505 Standard Frequency and Time signal 2.065 2.107 2.1905 -

2194 3.025 -

3.155 80 80 Aeronautical Mobile 3.5-4.0 4.7 - 4.75 97 4.0 - 4.063 80 Aeronautical Mobile 4.75 4.85 80, 90 Standard Frequency and Time signal 5.25 - 5.275 80, 90 5.68 - 5.73 5.9 - 6.2 73 6.2 6.525 6.765 7.0 18, 90 7.0 7.2 7.3 - 7.45 73, 80, 90 8.1 - 8.195 9.04 9.4 80, 90 9.4 9.9 80 97 80 73 EXHIBIT 13C Revision 1 (2 Aug 2022) SHEET 1 OF 2 Aeronautical Mobile Aeronautical Mobile 6.685 6.765 7.2 7.3 73, 97 8.965 9.04 Aeronautical Mobile 9.9 9.995 90 Applicant: Barrett Communications Pty Ltd FCC ID: OW4-407505 9.995 10.005 Standard Frequency and Time signal 10.1 10.15 11.175 -

11.275 Aeronautical Mobile 11.4 11.6 12.1 12.23 90 12.23 13.2 13.36 13.41 Radio Astronomy 13.41 13.57 13.87 14.0 90 14.0 14.35 97 90 80 90 97 10.15 11.175 11.6 12.1 90 73 13.2 13.26 13.57 13.87 14.35 14.99 14.99 15.01 Standard Frequency and Time signal 15.01 15.1 Aeronautical Mobile 15.1 15.8 15.8 16.36 17.48 17.9 18.068 18.168 18.9 19.02 19.8 19.99 21.0 21.45 22.855 23.2 24.89 24.99 90 73 97 73 90 97 90 97 16.36 17.41 80 17.97 18.03 Aeronautical Mobile 18.168 18.78 19.02 19.68 19.99 20.01 80, 90 90 Standard Frequency and Time signal 21.45 21.85 73 23.2 23.35 Aeronautical Mobile 24.99 25.01 Standard Frequency and Time signal 25.07 25.21 80, 90 25.21 25.33 25.55 25.67 Radio Astronomy 25.67 26.1 26.175 26.2 74 26.2 - 26.42 26.48 26.95 Fixed Mobile 26.95 26.96 27.23 - 27.41 18, 90, 95 27.41 - 27.54 28.0 29.7 29.91 - 30 97 Fixed 29.7 - 29.89 90 73, 74 74, 90 18 90 90 17.41 17.48 18.03 18.068 18.78 18.9 19.68 19.8 20.01 21.0 22.0 22.855 23.35 24.89 25.01 25.07 25.33 -

25.55 26.1 -

26.175 26.42 -

26.48 26.96 -

27.23 27.54 28.0 29.89 -

29.91 Dated this 10th Day of ___ November ________ 2023 _________ By:

______________________ Signature David Archer _________________________ Printed Title:

Technical Manager Telephone:

+618 9434 1700 Aeronautical Mobile 73 90 73 90 80, 90 80 80 90 80 90 90 Fixed Mobile 74, 80 74 18, 95 Fixed Mobile Fixed Mobile EXHIBIT 13C Revision 1 (2 Aug 2022) SHEET 2 OF 2

Applicant: Barrett Communications Pty Ltd FCC ID: OW4-407505 EXHIBIT 2 Statement of Certification

(Pursuant to FCC Part 2.907, 2.908) 2.1 Statement of Certification Transceiver type described herein (OW4-407505) is in compliance with all applicable parts of the FCC rules. Each unit manufactured, imported, or marketed will conform to the samples tested herein, within the statistical variations that can be expected due to high volume production and test measurement error. NAME:

David Archer SIGNATURE:

DATE:

TITLE:

10th November 2023 Technical Manager EXHIBIT 2 Revision 1 (27 July 2023) SHEET 1 OF 1

Applicant: Barrett Communications Pty Ltd FCC ID: OW4-407505 U.S. Agent Designation for Service of Process -

Certification Attestation Letter November 13, 2023 Office of Engineering and Technology Laboratory Division Equipment Authorization Branch Federal Communications Commission Laboratory 7435 Oakland Mills Road Columbia, MD 21046 ATTN.: Reviewing Engineer FCC ID: OW4-407505 Applicant FRN: 0014884340 Per section 2.911(d)(7) of the FCC rules, Barrett Communications (the applicant) certifies that the equipment for which authorization is sought is designated to the following U.S. Designated agent* for service of process:

Company Name:

Physical U.S. Company Address:

Agent name:

Agent Email Address:

FRN:

Motorola Solutions Inc. 8000 West Sunrise Boulevard Fort Lauderdale, Florida, 33322 USA Deanna Zakharia deanna.zakharia@motorolasolutions.com 0003778479 The above contact person accepts the obligation for service of process. The applicant accepts to maintain an agent for no less than one year after the grantee has terminated all marketing and importation or the conclusion of any Commission-related proceeding involving the equipment Applicant Signed:

Designated Agent Signed:

(Required, if different to Applicant):

Signed:

Signed:

Printed name:

Title:

Company Name: Barrett Communications Date:

David Archer Technical Manager November 13, 2023 EXHIBIT 13f Revision 2 (24 February 2023) SHEET 1 OF 1 Printed name:

Title:

Company Name: Motorola Solutions Inc. Date:

Deanna Zakharia Regulatory Compliance Manager November 13, 2023