FCC ID: PW2UTX3KULTRA 3.0 kW Analog TV Transmitter

UTX3K ULTRA INSTRUCTION MANUAL PINEAPPLE TECHNOLOGY, INC PINEAPPLE TECHNOLOGY, INC. UTX3K ULTRA Operating and Service Manual TABLE OF CONTENTS Section l --- SAFETY NOTICES 2

** READ THIS SECTION BEFORE INSTALLATON **

Secton ll --- TRANSMITTER SPECIFICATIONS ... 3 Section lll --- TRANSMITTER INSTALLATION 5 Section lV --- TRANSMITTER TURN-ON 7 Section V --- THEORY OF OPERATION 8 A. Introduction 8 B. ACDIS2 AC Main Distribution 8 C. AC2008 Power Supply 8 D. PAS4 and ADP500 Performance Monitor 9 E. RC8 Remote Monitor and Control W/ABS 10 F. MA5000 Modulator 11 G. UDR100AC Driver 11 H. US200-4 4-Way Splitter 11 I. MFA2PA Dual Power Amplifier 11 J. UC3KW4NDC Combiner/ Directional Coupler 12 K. BPU3KW Bandpass Filter 12 SECTION Vl --- SCHEMATIC AND PARTS LISTS A. UTX3K ULTRA ....................... 13 B. ACDIS2 AC Main Distribution 15 C. UDR100AC Driver 17 D. MFA2PA Dual Power Amplifier 19 1. 1A0035 Status Board 21 2. PA1K 1KW Power Module 23 a. U500LDA 500 W Amplifier 23 b. U250LD 250 W Amplifier 23 c. 1A0025 Power Distribution Monitor 23 d. 1A0018 Gain and Phase Matching Network 23 E. UC200-4 4-Way Splitter 25 F. UC3KW4NDC 4-Way Combiner with Directional Coupler 27 G. BPU3KW Bandpass Filter 28 H. PAS4 and ADP500 Performance Monitor 29 SECTION Vll --- RECOMMENDED ROUTINE MAINTENANCE 31 SECTION Vlll --- ADJUSTMENTS AND TUNING 33 SECTION lX --- PROBLEM SOLVING / TROUBLESHOOTING 35 SECTION X --- WARRANTY 38 SECTION Xl --- EXTENDED WARRANTY 39 Section I Safety Notices PINEAPPLE TECHNOLOGY, INC. UTX3K ULTRA Operating and Service Manual l --- SAFETY NOTICES l ---SAFETY NOTICES

** READ THIS SECTION BEFORE INSTALLATION **

SEVERE ELECTRICAL SHOCK OR BURNS MAY OCCUR IF THIS EQUIPMENT IS USED IMPROPERLY. NEVER WORK ON THIS EQUIPMENT ALONE. ALWAYS HAVE ANOTHER PERSON PRESENT WHILE WORKING ON ELECTRICAL CIRCUITS OR MOVING EQUIPMENT. COMMUNICATIONS TO EMERGENCY SERVICES SHOULD BE AVAILABLE AT ALL TIMES. BEFORE CONNECTING THIS EQUIPMENT TO ANY AC ELECTRICAL SOURCE READ THE SECTION ON INSTALLATION. ALL ELECTRICAL WIRING FOR THIS EQUIPMENT MUST BE PERFORMED BY QUALIFIED ELECTRICIANS. ALL WIRING MUST BE COMPLIANT WITH LOCAL ELECTRICAL CODES. POWER AMPLIFIERS AND SUPPLIES ARE HEAVY. TO INSTALL THIS EQUIPMENT IN RACKS USE TWO (2) PERSONS TO AVOID POSSIBLE INJURIES. NEVER OPEN THE CABINET ENCLOSURE OR UMPLUG CABLES OR WIRES WHILE THIS EQUIPMENT IS OPERATING. ALL SERVICE WORK MUST BE PERFORMED BY QUALIFIED TECHNICIANS ONLY. IF ONE IS NOT AVAILABLE LOCALLY, CONTACT PINEAPPLE TECHNOLOGY, INC. FOR A LIST IN YOUR AREA. Page 2 Section II Transmitter Specifications PINEAPPLE TECHNOLOGY, INC. UTX3K ULTRA Operating and Service Manual II TRANSMITTER SPECIFICATIONS II UTX3K ULTRA SPECIFICATIONS OPERATING Power Output .. 3 kW Peak Sync 150 Watts Aural RF Output Impedance.. 50 ohms Frequency Range.. 470 806 MHz Frequency Stability 1 PPM or better Harmonic and Spurious........ -60 dB or better ref to P-sync Power Consumption.. 12 kW maximum AC Line Voltage 220 240 VAC Single Phase (Standard) 208 240 VAC 3 Phase (Optional) VIDEO PERFORMANCE Visual Frequency Response +/- 1 dB across the TV channel -1.25 MHz to 4.75 Mhz relative to visual carrier. Differential Gain .< 7%

Differential Phase... < 10 degrees ICPM..< 5 degrees Low Frequency Linearity.. < 15%

Group Delay.. Meets FCC Part 73 Rule Video Input Impedance. 75 ohms Video Input Level.. 1 volt p-p Variation of Output Power. < 5%

Regulation of Output Power.. < 5% typical Video Signal to Noise Ratio.. < 45 dB un-weighted THESE SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE. Page 3 PINEAPPLE TECHNOLOGY, INC. UTX3K ULTRA Operating and Service Manual II TRANSMITTER SPECIFICATIONS AUDIO PERFORMANCE Audio Response.. Meets FCC Pre-emphasis curve

+14 to +95 Degrees Fahrenheit Ambient Distortion.< 1% THD FM Noise............... < 50 dB or better AM Noise< 40 dB or better AM Synchronous Noise. < 40 dB typical GENERAL Operating Temperature.. -10 to +35 Degrees Celsius Ambient Altitude.. 5,000 ft without additional cooling Cooling Requirement. Unobstructed air flow to internal cooling system should RF Output Connectors1 5/8 EIA Flange Weight900 lbs Dimensions Overall22 x 96 x 44 (W x H x D) be 2,000 CFM minimum THESE SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE. Page 4 Section III Transmitter Installation PINEAPPLE TECHNOLOGY, INC. UTX3K ULTRA Operating and Service Manual lll -- TRANSMITTER INSTALLATION lll -- TRANSMITTER INSTALLATION Page 1 of 2 To ensure long and reliable trouble-free service from the UTX3K ULTRA transmitter the following steps for installation are recommended:

1. MECHANICAL INSTALLATION: The UTX3K ULTRA was designed to be installed in a building protected from the weather. The building should have a hard-surface floor such as concrete with a moisture barrier. This barrier could be pressure-treated wood sub flooring which could be anchored to the concrete and to the transmitter to make the installation earthquake resistant. Allow a minimum of three feet around the transmitter cabinet for service access. The top of the transmitter should be clear for three feet above to allow the air to exhaust from the transmitter. Air flow thru the transmitter is approximately 2,000 CFM. Provisions for air inlet and exhaust from the room must allow air flow with minimal obstruction. In the event that the room temperature exceeds 35 Celsius (95 F), cooling air must be provided so that the room temperature will not exceed 35 degrees Celsius under worse case conditions. Notice: This equipment is HEAVY and must be handled by professional movers with proper equipment. Any damage caused by the installers is not covered under warranty. Check to ensure that installing crews have proper insurance coverage. 2. GROUNDING: Transmitter grounding is VERY IMPORTANT and must be done correctly for safety and operational reasons. A typical installation may be done as follows:

Use a heavy gauge wire such as #2 AWG stranded copper or solid copper buss one (1) inch wide by 1/8 inch thick for connections. The bonding between the transmitter and the ground rods must be good quality and protected from corrosion. The ground wires should run over the floor and be connected to the ground rods located outside the building. The wire should not go thru the concrete floor but over and around it. 3. AC WIRING: Wiring to the house electrical sub-panel will be routed to the AC terminal block mounted in the back of the rack. 220 VAC Single Phase Standard Power Connections Connections to the AC Main should be made as follows:

--- RED and BLACK are connected to the 220 VAC.

--- WHITE WIRE is connected to NEUTRAL.

---GREEN WIRE is connected to SAFETY GROUND. 208 VAC 3 Phase Optional Power Connections Connections to the AC Main should be made as follows:

--- RED, BLACK AND ORANGE are connected to the 208 VAC 3-PHASE.

--- WHITE WIRE is connected to the NEUTRAL.

---GREEN WIRE is connected to the SAFETY GROUND. NOTICE: All wiring of this type must be done by a QUALIFIED ELECTRICIAN and must conform to LOCAL and NATIONAL wiring CODES. Consult with your electrician to ensure that the proper breaker size is selected for the main circuit. Page 5 PINEAPPLE TECHNOLOGY, INC. UTX3K ULTRA Operating and Service Manual lll -- TRANSMITTER INSTALLATION lll -- TRANSMITTER INSTALLATION Page 2 of 2 4. ANTENNA CONNECTION: The transmitter is equipped with 1 5/8" EIA flange connectors located at the top of the rack. Conditions vary from site to site so some engineering may be required to ensure that the antenna is receiving the correct amount of power to comply with FCC licenses and to ensure safety from lightning, etc. Page 6 Section IV Transmitter Turn-On PINEAPPLE TECHNOLOGY, INC. UTX3K ULTRA Operating and Service Manual lV -- TRANSMITTER TURN-ON PROCEDURE lV --- TRANSMITTER TURN-ON PROCEDURE Before applying AC Power to the transmitter for initial turn-on and check out, the installation should be approved by a qualified broadcast engineer. The turn-on procedure that follows is recommended by Pineapple Technology, Inc. engineering staff:

1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. Check transmitter load or antenna for proper installation and connection to the transmitter. Open the transmitter and inspect all cables and wires for loose connections or broken wires in the rack assembly. Check for damage to the equipment mounted in the rack. Check all AC breakers and on/off switched to ensure that they are all in the OFF position. Verify AC switch on the UDR100AC is in the OFF position. Locate the output level adjustment on the MA1000 Modulator and turn the level down to minimum or CCW (Note: This is a multi-turn potentiometer) Turn-on Main AC breaker located in the house service sub-panel. The MA1000 Modulator should come on at this point. Verify the correct channel number appears on the modulator front panel and the frequency lock LED is lighted. Turn-on the AC Main breaker located on the ACDIS2 Power Distribution panel. A light should come on indicating power is on. Turn-on the AC Switch located on the front of the ADP500. The indicating lights should be on and ready for operation. Turn-on the AUX (FAN) Breaker(s) located on the ACDIS2 front panel. The PA fans and rack exhaust fans should come on. Turn-on the AC Power breakers located on the front panel of the ACDIS2. Check the AC2009 power modules, three (3) each, to see if the green lights are lighted indicating normal operation. Using the ADP500 and PAS4, check the idling currents on each PA to ensure that the currents are in the correct range. Typical range is 1.5 to 2.5 amps. See ADP500 Operating Section for details. NOTICE: The Modulator has been set at the factory so that the output power indication on the ADP500 will show 100% or 2 KW p-sync power level. It is important to read the instruction manual supplied with the modulator to locate key adjustment devices on the front panel. The output level adjustment will be necessary for the next step in the turn-on procedure. 14. 15. 16. 17. 18. 19. Turn-on the power switch located on the UDR100AC front panel. Apply a video signal (1 volt P-P) to the video input terminal. Verify the display rocker switch on the MA5000 Modulator is in the VIDEO or down position and three (3) green bars appear on the display bar graph. Slowly increase the output level adjustment while watching the RF Output level on the APD500 meter until it reads to 50%. Using the ADP500 reflected power indication, check the LOAD reflected power. This should be less than 5% reflected. Return to the PA current readings on the ADP500 to verify that all the currents are approximately the same. 20. With successful performance to Step 17, the transmitter output power can be increased using the output level adjustment on the modulator to achieve 100%. The aural power can be added at this time not exceeding 10% of output p-sync power as indicated on the ADP500. Page 7 Section V Theory of Operation PINEAPPLE TECHNOLOGY, INC. UTX3K ULTRA Operating and Service Manual V --- THEORY OF OPERATION (Page 1 of 5) A. INTRODUCTION V -- THEORY OF OPERATION The UTX3K ULTRA transmitter was designed to meet or exceed all FCC applicable specifications for TV broadcast equipment. Special attention was given to the selection of sub-assemblies and components to achieve maximum reliability and minimum down time. The construction of the UTX3K ULTRA is BASIC and MODULAR with most components field replaceable. Special emphasis was placed on

"KEEPING IT SIMPLE" and returning to more traditional transmitter layouts and instrumentation. This transmitter was designed for Analog (NTSC) transmission with provisions and options available to convert to Digital Service at a later date if necessary. Refer to the UTX3K ULTRA block diagram in for an overview of the transmitter architecture. This will give the technician basic information needed to understand the operation of the transmitter and the function of each subassembly. SEE SECTION Vl.A FOR PARTS LIST AND BLOCK DIAGRAM. B. ACDIS2 AC & DC DISTRIBUTION The ACDIS2 is the primary AC power inlet module. The UTX3K ULTRA transmitter was designed to accept 220 to 240 VAC Single Phase (Standard) using a four (4) wire connection (208 3 Optional). The four wires are:

Standard

--- 2 wires for 220 -240 VAC Single Phase

--- 1 wire for neutral connection

--- 1 wire for safety ground connection Optional

--- 3 wires for 208 - 240 VAC 3 Phase

--- 1 wire for neutral connection

--- 1 wire for safety ground connection CAUTION: Connection to the AC Primary source must be made using all four wires listed above. Follow the wiring instruction given in TRANSMITTER INSTALLATION Section lll.3. If not followed, severe damage to the transmitter and, or, electrical shock could result. The ACDIS2 performs the following functions:

1. Provides a primary AC power breaker point to shutdown the transmitter 2. Provides 220 (208 3) VAC power to each of the three 2 KW DC power supplies with individual breaker points for added safety. 3. Provides 110 VAC circuits for Modulator, ADP500, ABS (as necessary) and AUX Power where needed. 4. Analog metering is provided to monitor the Power Supply voltage and current being applied to the RF Amplifier states. 5. Power supply current sharing test points are provided for checking current sharing between power supply modules. SEE SECTION VI.B FOR SCHEMATIC AND PARTS LIST C. AC2008 2KW POWER SUPPLY MODULE The UTX3K ULTRA transmitter is designed with over 6 KW of DC power. To achieve this level, the power supply in each transmitter rack is made up of three (3) TWRI6004 (PTI Part # AC2008) power modules mounted into one (1) main frame assembly (PTI Part # AC2009) which are capable of managing three (3) 2 KW modules each. Page 8 PINEAPPLE TECHNOLOGY, INC. UTX3K ULTRA Operating and Service Manual V -- THEORY OF OPERATION

(CONTINUED) Page 2 of 5 The power modules are "HOT PLUGGABLE" and can be removed or installed without turning off the transmitter. Each power supply module has OVER VOLTAGE, OVER CURRENT AND OVER TEMPERATURE protection as well as a fault signal in the event of a failure. REFER TO MANUFACTURER'S MANUAL FOR MODEL # TWRI6004 PROVIDED WITH THE UTX3K ULTRA. D. ADP500 AND PAS4 PERFORMANCE MONITOR The ADP500 AND PAS4 Performance Monitor provides the following functions:

1. 2. 3. 4. 5. 6. 7. Monitors FORWARD AND REFLECTED POWER to the antenna and presents it as a percentage of power rating. The transmitter comes set to 100% P-Sync power based on the ratings of the transmitter. Monitors Aural Power as a percentage of P-Sync rating (5% typical). Provides a HIGH ANTENNA VSWR MONITOR in the event of an antenna or coax failure where the reflected power exceeds 25% the transmitter will shut down. The front panel LED will change from green to red in case of a fault. Provides current monitoring of all the pallets used in the three (3) PA1K power amplifier assemblies. The current levels can be read directly from the multi-meter on the front panel. Individual pallets are selectable on the ADP500 and the PA assemblies are selected using the PAS4. In normal operation, a PA FAULT is indicated by going from green to read. RED indicates that the current level is below 500 ma and a transistor may have failed. To read the actual current, select the appropriate PA Bank using the PAS4. The ADP500 will display status of each pallet in that PA. The multi-meter will read the actual current. A PA INHIBIT switch is provided for failure diagonostic purposes. When activated, this switch allows the technician to monitor the bias currents for each pallet. These readings were recorded at the factory and are found on the Transmitter Test Report, DC Test Report Section. This is the best way to troubleshoot possible transistor problems. When in the PA INHIBIT mode, the RF PWR OFF LED will change from green to red indicating that the "SHUTDOWN LINE" is at TTL 0 state and the output power has been reduced to near zero. An RF MONITOR port (BNC) is available to connect a spectrum analyzer for monitoring the output signal. METER SELECTION SWITCHES The PAS4 is used to select the appropriate PA module (PA1K) for performance display on the ADP500. PA designations are PA1 starting from the top row left, PA2 in the top row right, with PA3 and 4 located on the bottom row left to right. The rotary switch on the ADP500 is the detail selector for the multi-meter. The various positons are defined as follows:

PA1 thru PA5Reads PA Pallet currents as selected Typical reading in INHIBIT MODE 1.5 to 2.5 A Typical reading SMPTE BARS 5-7 A for PA1 thru PA4 with normal picture Typical reading SMPTE BARS 2-3 A for PA5 with normal picture Page 9 PINEAPPLE TECHNOLOGY, INC. UTX3K ULTRA Operating and Service Manual V -- THEORY OF OPERATION

(CONTINUED) Page 3 of 5 7. METER SELECTION SWITCHES (Continued) PA6 No Connection PS VOLTS Reads DC voltage applied to PA stages Typical reading would be +30 to 33 VDC P FWRDReads PA output power in P-Sync percentage of rating Full power reading would be 100%

P RFLDReads PA output power being returned from the load and displayed as a percentage of forward power. Typical reading would be < 5% indicated. P AURALReads the AURAL POWER component as a percentage of forward power. Typical reading would be 5%

AUX 1 & AUX 2Not used in this configuration. REFER TO SECTION VI.H FOR SCHEMATICS AND PARTS LIST E. RC8 REMOTE MONITOR AND CONTROL WITH ABS This equipment is OPTIONAL and can be used to satisfy FCC remote control requirements. The Remote Monitor is used to monitor the operational status of the transmitter and will allow the operator to turn RF on or off and adjust power levels remotely. The following items are monitored or controlled:

1. 2. 3. 4. Transmitter on/off function Power output level monitor and adjust AC Line Voltage status - With ABS you can be notified if there is a power failure at the site. Various other custom options are available. Specify these at the time the transmitter is purchased and they will be included if possible. Remote monitoring requires a phone line connection. Information can be accessed via a PC Terminal or via an optional "VOICE COMMAND LINE". The Auxiliary power unit requires a battery connection. A common car battery (12 VDC) can be used with a charger as an ABS. This will run the Monitor and provide access to transmitter status for several hours. A manual for this equipment is provided by the Manufacturer and is included in the UTX3K ULTRA package shipped with the transmitter. The manual is only included if this option was purchased for delivery with the transmitter. REFER TO INSTRUCTION MANUAL PROVIDED WITH THIS PACKAGE. Page 10 PINEAPPLE TECHNOLOGY, INC. UTX3K ULTRA Operating and Service Manual V -- THEORY OF OPERATION

(CONTINUED) Page 4 of 5 F. MA5000 MODULATOR The heart of any TV Transmitter is the MODULATOR. This equipment receives the video and audio signals was well as any control signals needed. The base band signals are converted to RF with an output on the desired operating channel. Detail operation of the Modulator with schematics and parts list are provided by the equipment manufacturer and included in the UTX3K ULTRA package shipped with the transmitter. REFER TO INSTRUCTION MANUAL PROVIDED WITH THIS PACKAGE. G. UDR100AC 100 WATT DRIVER AMPLIFIER The RF output from the MA5000 modulator is accepted by the UDR100AC DRIVER AMPLIFIER. This amplifier increases the drive level to that required for each of the PA1K power amplifiers to make rated power. The UDR100AC is powered by 110 VAC. H. US200-4 4-WAY SPLITTER The US200-4 4-Way phase and gain splitter receives the output from the UDR100AC Driver Amplifier and splits it into 3 parts with phase and power levels equal. This unit is an isolated in-phase splitter and will provide some isolation in the event one PA fails. SEE SECTION VI.F FOR PARTS LIST I. MFA2PA POWER AMPLIFIER HOUSING The MFA2PA is the main RF Power Amplifier housing which accommodates two (2) PA1K Amplifiers. The housing includes the following:

2 each 330 CFM cooling fans 2 each Air filter assemblies 2 each Front panel status PC boards 1 each Main chassis 2 each Mechanical slide assemblies 1 each AC Filtered inlet for cooling fans SEE SECTION Vl.D FOR SCHEMATICS AND PARTS LIST I-1. PA1K POWER AMPLIFIER The PA1K is the main RF Power Amplifier Assembly used in the UTX3K ULTRA. Each amplifier assembly is made up of one (1) U250LD power pallet and two (2) U500LDA power pallets. These amplifiers are operated in Class A/AB or sometimes referred to as "HARD AB". This refers to the bias levels to achieve best linerarity. Page 11 PINEAPPLE TECHNOLOGY, INC. UTX3K ULTRA Operating and Service Manual V -- THEORY OF OPERATION

(CONTINUED) Page 5 of 5 Each PA1K amplifier assembly includes the following:

2-Way in-phase splitter 2-Way in-phase combiner 1 each U250LD power pallets 2 each U500LDA power pallets 1 each Phase and gain matching circuit 1 each 1 each 1 each Circulator 1 each Power distribution module (1A0025) 2 each Thermal sensors 1 each Remote monitor port (DB9) 1 each Front panel status port (Molex) 1 each Filtered DC input port 1 each Type N Panel mounted RF Input port 1each DIN 7/16 Panel mounted RF Output port SEE SECTION Vl.E. FOR SCHEMATICS AND PARTS LIST J. UC3KW4NDC COMBINER/ DIRECTIONAL COUPLER The UC3KW4NDC is a 4-Way in-phase combiner. The combiner is specifically designed for the channel designated transmitter frequency. This is a closed unit and cannot be serviced. SEE SECTION Vl.G. FOR PARTS LIST K. BPU3K UHF BAND PASS FILTER This Band Pass filter was designed to meet FCC Certification requirements with minimum loss of RF Power. The BPU750N comes tuned and tested to the operating frequency of the transmitter and should no be adjusted without proper equipment. Replacement filters are available as P/N BPUKW UHF (+CHANNEL NUMBER). Page 12 Section VI Schematic and Parts List PINEAPPLE TECHNOLOGY, INC. UTX3K ULTRA Operating and Service Manual Vl -- SCHEMATICS AND PARTS LIST A. UTX3K ULTRA Parts Assy Item Qty Type P/N Top 1 CAT UTX3K ULTRA PS MFR40RU 1 2 1 1 1 1 1 4 4 1 PL MFA2PA PS AC8100 PS AC8220 CAT ADP500 PL ACDIS2 CAT PAS4 PS PS PL 1A7052 PAC0005 1A6004 AC2009 PL PS AC2008 PS MF9283 CAT US200-4 PS UC3KW4NDC PS 1 3 8 1 1 1 0.5 PS MFR44RU-HP5 1 2 1 PS PS MF9555A PS MF9556A BPU3KW 851026 3 4 5 6 7 8 9 10 11 12 13 14 15 16 18 19 20 22 23 24 25 26 27 28 29 Detail STD 19 IN RACK 6 FT WITH 1 5/8 FLG BLACK CONTEMPRA 2 WELDED UHF/VHF ASSEMBLIES Title UHF TV XMTR 3 KW P-SYNC 40 RU ASSEMBLIED RACK 2KW MAIN FRAME W/U500LD AMPS AC WIREMOLD 120 VAC 19 IN RACK MTG AC WIRE MOLD 220 VAC DISPLAY PANEL, ANALOG AC & DC DISTRIBUTION PA SEL SW FOR ADP500 CABLE ASSEMBLY RG-223 DB9 MALE TO MALE 6 FT LONGPA MONITOR CABLE DC CABLE SET 5KW UHF DRIVER AMP 100W W/AC SUPPLY GROUNDING BAR CU PTI LABOR 1 X 4 OUTLETS 6 FT CORD 19 IN RACK MT SEL SW AND METER UTX2KWA TRANSMITTERS 4 POSITIONS W/1 OUTPUT BNC-M TO N-M 52 INCHES LONG HIGH CURRENT ASSEMBLY U250LD AND UDR100 AMPS MIDDLE ATLANTIC BB-44-1 LOADED LOADED UTX SERIES XMTR 7/16 DIN TO N M MODIFIED TO PTI SPECS CABLE ASSEMBLY LDF4-50 M369 CADCO MODULATOR 6KW 3EA PWR SUPPLY MAIN FRAME 2 KW 31 VDC PWR SUPPLY EQUIPMENT SUPPORT UHF 4-WAY SPLITTER 3 KW N-WAY COMB W/COUPLE 1 5/8 FLG W/N INPUTS COM-TECH FC4E110C BP FITER 3 KW BAND IV BLACK 10-32 MTG SCREWS EXHAUSE MULTIFAN VOSTERMANS 4VF1042A OUTLET SIDE PANEL EXHAUST FAN EXHAUST FAN FINGER GUARD UNIPOWER RRS2U UNI-PWR TRS6000-406 14 GA GAL-XC (LEFT & RIGHT) TYPE N 500 WATT CAT UDR100AC PS MFR44RU-BB 1 1 INHOUSE_LABOR 35 PS INHOUSE-ENG TESTENG TESTING AND FIXIT 20 PS PL 4 1A7065 PS MA1000 1 Page 13 A R T L U K 3 X T U I M A R G A D K C O L B 3 V E R 1 f o 1 T E E H S

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+32VDC C A n a M i V 0 2 2 FANB FANA 220VAC 220VAC 220VAC X U A 0 1 110VAC n o i t u b i i i r t s D n a M C A 9 0 0 2 C A W K 6 r e w o P l y p p u S DCOutput t e n I l C A C A V 0 2 2 I 2 S D C A s t l o V C D s p m A C D C A t u O t e n I l C A C A V 0 1 1 C A V 0 2 2 A D C A V 0 2 2 t e n I l C A F I A t u p t u O F R l a r u A l a u s V i Page 14 PINEAPPLE TECHNOLOGY, INC. UTX3K ULTRA Operating and Service Manual Vl -- SCHEMATICS AND PARTS B. ACDIS2 Assy Tree Title Detail UTX2KWA TRANSMITTERS HOYT MODEL 3115 1-1/2 ANA PANEL HOYT 3115 100mv FS Lightweight shunt, 100 Millivolt, 300 amp. 115 VAC 10 AMPS RS TYPE ACDIS2 AC & DC DISTRIBUTION 660110 DC PANEL METER 50 V FS 660113 DC AMP METER 300 A FS 670300 SHUNT, METER 100 mv FS AC3110 AC CKT BREAKER AC8000 AC POWER DISTRIBUTION BLOCK 3 POLE 840 A 60O VAC AC5105 AC PANEL MTG OUTLET AC4111 AC POWER PLUG 220AC 16A 480461 MOLEX CRIMP TERM PLUG 480462 MOLEX CAP STRAIN RELIEF 480460 MOLEX CRIMP TERM 6 POLE 480463 MOLEX PIN CONTACTS LRG 480464 MOLEX SOCKET CONTACTS 480465 MOLEX PLUG HOUSING 480466 MOLEX CAP HOUSING 480467 MOLEX STRAIN RELIEFS 471380 FUSE FAST ACTING 80 AMP 460190 FUSE HOLDER 400A AC3315 AC CKT BKR ELUMINATED Item Qty Type P/N Top 1 2 3 4 5 6 8 9 10 11 12 13 14 15 16 17 18 19 20 21 23 24 25 26 27 28 29 PL PS 1 PS 1 PS 1 PS 1 PS 1 PS 1 PS 4 PS 2 PS 4 2 PS 12 PS 12 PS 1 PS PS 1 PS 2 4 PS PS 4 PS 5 PS MF9312 ACDIS MAIN CHASSIS 1 1 PS MF9313 ACDIS MAIN COVER PS MF9311 PLATE, FRONT ACDIS2 1 PS 1 2 PS PS 2 PS 1 PS 2 1 PS AC3250 AC CKT BRKR 453000 HW, TIP JACK 453001 HW TIP JACK 453002 HW, TIP JACK 453003 HW, TIP JACK AC4302 AC CORD GRIP 4 POSITION "GANGED" 15A 115VAC POWER INLET SCHURTER 4300.0922 PLUG HOUSING 6 POLE ACDIS SUBASSEMBLIES CAP HOUSING PANEL MTG CONN PIN 14-20 AWG TIN CRIMP CONN SOCKET 14-20 AWG TIN CRIMP 9 POLE MATE-LOC 9 POLE 9 POLE USE WITH LFFB0001 HOLDER LITTELFUSE LFFB001 U600LPA 220 15 A 2 POLE AL 090 MATERIAL ALODYNE/W SILK 1 & 2 KW 090 AL ALODYNE 50 AMP 2-POLE 220V RED, Insulated standard TIP JACK WHITE, Insulated standard TIP JACK BLACK, Insulated standard TIP JACK BLUE, Insulated Standard TIP JACK 0.98 OD CABLE 1.3 HOLE MTG Page 15

Page 16 PINEAPPLE TECHNOLOGY, INC. UTX3K ULTRA Operating and Service Manual Vl -- SCHEMATICS AND PARTS LIST C. UDR100AC Assy Tree Item Qty Type P/N Top 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 1 1 1 1 1 1 1 2 2 1 1 1 1 1 5 1 2 1 1 1 CAT UDR100AC CAT U250LD CAT UDR25A PS MF9337B PS MF9338F PS MF9339B PS MF9340B PS MF9341 PS 851005 990201 PS 631001 PS 484001 PS PS AC1003 AC3110 PS 451004 PS PS 451010 PS AC2010 PS CC316-NPF-PT-21 PS PS PS 481100 140010 140012 Detail DRV100DC DRV100-3 DRV100DC U250LD AND UDR100 AMPS 470-810 MHz ZINGER COMBINER Title UHF DRIVER AMP 100W W/AC SUPPLY UHF TV 250 W P-SYNC PALLET DRIVER, 25W LINEAR 470-815 MHz LDMOS DUAL PACKS PALLET MTG PANEL, FRONT CHASSIS DIVIDER AIR FLOW TOP COVER DRV100DC DRV100 HEAT SINK FAN DC 24 V 80X25mm FILTER & FINGER GUARD INDICATOR LAMP LED SW, ON/OFF ROCKER AC FILTER, AC LINE AC CKT BREAKER HW TER BLOCK TERM BLOCK JUMPERS DC POWER SUPPLY 115/220 VAC 320 WATTS 27-31 VDC CABLE ASSEMBLY RG316/

CON 9 P D-SUB MALE RES 2W 10 OHM RES AXIAL TH 2 WATT ALL DRV TYPES COMAIR-ROTRON 80X25mm FAN 30 PPI GREEN 24 VDC 1/2 IN MTG HOLE CW IND. NAA-211-B121-00 110/220 AC PLUG 115 VAC 10 AMPS RS TYPE

#6 2X6 ROW 2 POLE 1 N-FM PANEL MT WITH PIGTAIL MALE 9P SOLDER CUP 10 OHM 75 OHM METAL OXIDE Page 17

Page 18 PINEAPPLE TECHNOLOGY, INC. UTX3K ULTRA Operating and Service Manual Vl -- SCHEMATICS AND PARTS LIST D. MFA2PA POWER AMPLIFIER -- PARTS LIST Item Qty Type P/N Title Detail Top PL MFA2PA 2KW MAIN FRAME W/U500LD AMUHF/VHF ASSEMBLIES 1 2 3 5 10 11 14 16 17 18 19 20 22 24 25 27 28 29 30 31 32 33 1 1 1 1 4 1 2 2 6 2 2 2 4 2 2 2 1 2 2 2 PS MF9100E PS MF9101D PS MF9102C PS MF9104B PS MF9139 MAIN CHASSIS DIVIDER, PLENUM DIVIDER, FAN COVER, TOP SLED GUIDE MFA1KW MFA1KW MFA1KW MFA1KW U600LP & MFA1KW PS MF9123D FRONT PANEL, PAINTED MFA1KW PS 990199 PS MF9127 FILTER, AIR DRY FF-5 MFA/PS FP MTG BRACKET, MOLEX FMALE MFA1KW PS PS PS PL PS 480472 480400 460150 1A0035 MOLEX CRIMP TERM MFA1KW MOLEX MFG 39-00-0041 MOLEX PLUG 6 TERM MFA1KW MOLEX 15-06-0065 MINI-FIT BMI FUSE HOLDER PANEL MTG 3AG TYPE QC CON PA STATUS BOARD PC9061H INHOUSE_LABOR PTI LABOR PS MF9308 PS MF9310 PS MF9258 FAN FINGER GUARD MFA1KW & U600LPA AC FAN INLET HOLDER MFA1KW BRACKET FILTER MTG PAINTEDU600LPA & MFA1KW PS MF9197B DIVIDER PA MFA1KW PS PS PS 851025 AC5110 451080 FAN, AC 220 V COMAIR ROTRON TN3A2 AC FAN PLUG & CORD FMALE PLUG 24 IN CORD TERM BLOCK EU STYLE 4 POLE 12-24 GAGE 0.1 PS H-TAPE_TFE TEFLON TAPE, SLIDES 1 INCH X 56 INCHS 2 PL PA1K UHF 1KW PA ASSEMBLY U500LDDIN OUTPUT W/CAPTOR FILTERS Page 19

Page 20 PINEAPPLE TECHNOLOGY, INC. UTX3K ULTRA Operating and Service Manual Vl -- SCHEMATICS AND PARTS LIST D. MFA2PA POWER AMPLIFIER 1. 1A0035 STATUS BOARD PARTS LIST PL PS PS PS PS PS PS PS PS PS PS PS PS PS PS PS PS PS PS PS PS PS PS PS PS PS 1A0035 114330 115103 115334 115563 115682 21X005 21X008 240109 240110 240111 241300 241301 27022N 480500 520230 520275 530350 538150 630200 750001 830510 PC9061H 115331 520120 115683 Item Qty Type P/N Top 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 Title PA STATUS BOARD RES ARRAY, SMT RES CHIP 0805 RES CHIP 0805 RES CHIP 0805 RES CHIP 0805 CAP CHIP 0805 CHIP CAP 0805 CAP TH POLYPROPYLENE CAP TAN SMD CAP TAN SMD CAP RADIAL TH CAP RADIAL TH FT CAP 22N SM CON MICRO-FIT HEADER 3.0 SEMI DIODE SHOTTKEY SEMI, DIODE DUAL HEX SCHMITH TRIG IC SWITCHER SIMPLE IND LED DUAL COLOR FERRITE BEAD SMT IND, W/W PA STAUS BRD RES CHIP 0805 SEMI ZENER RES CHIP 0805 OUTSIDE ASS'Y 1A0025 PTI LABOR 2 5 1 1 3 6 1 1 1 1 1 1 6 1 1 1 2 1 5 8 1 1 2 1 1 0.2 PS OS_AES_1A0025 0.1 PS INHOUSE_LABOR INHOUSE-ENG TESTENG TESTING AND FIXIT 0.1 PS 480510 PS 1 115333 PS 1 1 PS 1155112 RECEPTACLE RES CHIP 0805 RES 0805 CASE Detail PC9061H 330 OHMS 10K OHM SMT 0805 330 K OHM SMT 56K OHM 0805 SM 6.8 K OHM SMT 100NF 10% XTR 0805 CASE 10NF 50 V 0805 SM 3N3 600 WVDC .033UF 3.3 UFD 35 V 47 UF 10 V TAN 330 UF 35 VDC 680 UF 10 V ELECTROLYTIC AVX OR MURRATA PART 8 PIN PC MTG 1.5 A 60 VDC D-64 SW CC 70V SOT-23 74HD14 SO8 PAK RED/GREEN T1-3/4 CLR 0805 EMI FERRITE BEAD 82 UH .58A PWR SMD FR4 060 1/1 CBR 33O OHM SMT 5.6 V MELF 68K SM ASS'Y WORK 8 CKT RECEPT MOLEX 33K OHM SMT 51.1 K OHM 1%

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Page 22 PINEAPPLE TECHNOLOGY, INC. UTX3K ULTRA Operating and Service Manual Vl -- SCHEMATICS AND PARTS LIST D. MFA2PA POWER AMPLIFIER 2. PA1K ASSEMBLY TREE Item Qty Type P/N PA1K U500LDA 1A0025 PL PL MF9525 PL MF9526 PL MF9539 PL PL PS CT-1326A PS PS MF9126C PS MF9309 PS MF9203 B1 PS MF9137E PS 454001 CAT U250LD PS 270600 PC9022A_B2 Detail DIN OUTPUT W/CAPTOR FILTERS BLF872 LDMOS BLF872 DEVICES Title UHF 1KW PA ASSEMBLY U500LD PAs HS RT SIDE U500LD ASSEMBLY HS LEFT SIDE U500LD ISOLATOR & 2-WAY COMB PLATE U1KWPA ASSEMBLY W/BLF872A 500W 470-810 MHz POWER PALLET RGR 4003 032 MATERIAL BLF872 DC ISO/MONITOR CKT CIR W/TABS CH 26 TO 44 FT CAP CAPTOR 9 NF 500V MOLEX BRACKET MTG PLATE REAR PANEL WITH SILK 1A0025 PCB MTG PLATE SLED HANDLE, REAR UHF TV 250 W P-SYNC PALLET PC BOARD COMB PCB SET OF (3) BRDS OUTPUT COMB REPLACED CB99 Circulator 542-656 MHz 5/16 TERMINALS U600LD ALL 090 AL ALODYNE SM 09 AL W/MTG U500L AL BLK NYLON 470-810 MHz ZINGER COMBINER 2-WAY INPHASE 060 1/1 RG U1KWPA ASS'Y PL PS

.4 PS PC9518A INHOUSE_LABOR PTI LABOR INHOUSE-ENG TEST 1 PS CA4000 COAX IS SUPPER FLEX ENG TESTING AND FIXIT COAXIAL ASSEMBLY W/7_16 DIN CON 1 1 1 2 1 1 1 1 1 1 1 1 1 1 1 2 Top 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 Page 23

Page 24 PINEAPPLE TECHNOLOGY, INC. UTX3K ULTRA Operating and Service Manual Vl -- SCHEMATICS AND PARTS LIST E. UC200-4 Assy Tree Item Qty Type P/N Top CAT US200-4 Title UHF 4-WAY SPLITTER Detail TYPE N 500 WATT Page 25

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Page 27 SECTION VI - SCHEMATICS AND PARTS NO SERVICEABLE PARTS Pineapple Technology, Inc. Rocklin, CA BPU3KW BANDPASS FILTER CIRCUIT DIAGRAM DWG NO. REV SIZE FSCM NO. SCALE SHEET Page 28 PINEAPPLE TECHNOLOGY, INC. UTX3K ULTRA Operating and Service Manual Vl -- SCHEMATICS AND PARTS LIST E-1 PAS4 SELECTOR SWITCH ASSY Item Qty Type P/N Title Detail Top 1 2 3 4 5 6 7 1 1 1 5 1 1 1 CAT PAS10 PS PC9501 483010 PS 481250 PS PS 481260 PS MF9342X1 PS MF9343X1 PS MF9344X1 PA SEL SW FOR ADP500 PA SELECTER SWITCH SW 10 POLE CON DB9 SUB RT ANGLE FM CON DB9 2 SECTION RT ANG PLATE, FRONT PAS10 CHASSIS, PAS10 COVER, TOP PAS10 10 POLE INPUT 1 OUTPUT 10 POLE ADP500 ADP500 PA SELECTOR PAS10 METAL CASE AMP7457814 PCB MTG 0.9 SPACING W/ PAINT & SILKSCREEN W/ ALODINE & SILKSCREEN W/ ALODINE & SILKSCREEN E-2 ADP500 PERFORMANCE MONITOR Item Qty Type P/N Top 1 CAT ADP500 PL 1A0029 1 2 3 4 5 6 7 8 9 10 11 12 13 1 1 1 1 1 1 1 1 1 1 1 1 PL PS PS 1A0030 471306 460150 484001 PS 660103 PS 1A0027 PL PS2527 PS PS 484020 PS MF9214 PS MF9011 PS MF9209B PS MF9208 Title DISPLAY PANEL, ANALOG ADP1000 LOGIC PCB ADP1000 FP PCB FUSE 3AG Detail SEL SW AND METER LOGIC BRD PARTS FP PCB AND PARTS 6 AMP FUSE HOLDER PANEL MTG 3AG TYPE QC CON SW, ON/OFF ROCKER AC METER, 2 VOLTS FS PWR MONITOR CK POWER SUPPLY OPEN/FRAME TOGGEL SW MOMENTARY/ON FRONT PANEL Cover, Top DIVIDER CHASSIS CW IND. NAA-211-B121-00 SELCO 39M-0-2VDC PC9052B CBR 110/220 VAC 27 V 25 W 2 POLE PANEL FRONT ADP500 ADP1000 ADP1000 ADP500/1KW Page 29

Page 30 Section VII Recommended Routine Maintenance PINEAPPLE TECHNOLOGY, INC. UTX3K ULTRA Operating and Service Manual VII -- ROUTINE MAINTENANCE VII --- ROUTINE MAINTENANCE (Page 1 of 2) The following KEY MAINTENANCE AND PERFORMANCE CHECKS should be made monthly or more frequently in some environments where dust and rodents are problems. Pineapple Technology, Inc. recommends that the station provide a data log book to maintain these records. DANGER: SOME OF THE RECOMMENDED TESTS REQUIRE THAT THE TRANSMITTER BE OPERATING IN NORMAL MODE. THIS PROCEDURE MUST BE PERFORMED BY A BROADCAST ENGINEER. MORE THAN ONE PERSON SHOULD BE PRESENT IN CASE OF AN ACCIDENT REQUIRING ASSISTANCE. COMMUNICATIONS TO EMERGENCY SERVICES SHOULD BE AVAILABLE. TRANSMITTER This is an integrated 3KW transmitter and is built around four (4) PA1K amplifier assemblies located in two MFA2PA mainframes. Record the transmitter forward and reflected power on the watt meter provided with the transmitter. This measured value will vary with picture content. Using the ADP500 and PAS4 record currents for each power LDMOS device in the transmitter. The absolute measured value will vary with picture content so this is best performed with a fixed signal such as SMPTE BARS, however, relative measurements are adequate to indicate a problem at the power device stage. (See operating instructions for ADP500 and PAS4 for more details).

(OPTIONAL) When the transmitter is first put into service it is a good idea to go through each PA stage and record the static bias level (NO RF DRIVE). This is done by selecting the desired PA and using the PA INHIBIT switch. When this switch is activated, the PA drive is turned off and the bias current can be measured. This is a momentary switch because when it is activated, the PA drive is removed from all the PA's in one half of the transmitter and the output power will be reduced by 6 db. THIS IS THE BEST METHOD TO USE WHEN TROUBLESHOOTING A POSSIBLE BAD POWER TRANSISTOR. Record the voltage and current measurements displayed on the AUX meter. Carefully inspect RF Output coaxial cables for excessive heating or discoloration. Check DC Power connections on shunt panels and power supplies for over heating which could indicate the hardware needs attention. Check DC Connections on the PA rear panel. Remove and clean the air filters located on the front panel of each MFA2PA mainframe assembly. It is safe to remove the filter while the transmitter is operating. The filters may be cleaned with a light detergent and dried completely before re-installing. Spare filters are available from Pineapple Technology, Inc. Request Part Number P/N 990199 when ordering. Page 31 PINEAPPLE TECHNOLOGY, INC. UTX3K ULTRA Operating and Service Manual VII --- ROUTINE MAINTENANCE (Page 2 of 2) FACILITIES VII -- ROUTINE MAINTENANCE Clean all air inlet filters and exhaust outlets to ensure that the transmitter is getting clean unobstructed airflow. Perform recommended service on air condition systems. Rodent traps or baits should be renewed to keep the facilities clear of these pests which can cause damage to the transmitter. Page 32 Section VIII Adjustments and Tuning PINEAPPLE TECHNOLOGY, INC. UTX3K ULTRA Operating and Service Manual VIII -- ADJUSTMENTS AND TUNING VIII --- ADJUSTMENTS AND TUNING (Page 1 of 2) The UTX3K ULTRA is a new series of transmitters offered by Pineapple Technology, Inc. The latest in LDMOS device and circuit technology are employed to ensure reliable and serviceable operation for many years. There are very few adjustments necessary to maintain full service condition. The following will give the technician a general overview of locations for locating these adjustments:

1. 2. 3. MODULATOR - See details for all adjustments in the Manufacturer's Instruction Manual provided with your transmitter. Should you have any questions, contact the Pineapple Technology, Inc Engineering staff for assistance. BPU3KW - The bandpass filter provided with your transmitter has been tuned at the factory and adjustments should not be necessary and are not recommended. Any attempt to tune or modify this filter will void manufacturer's warranty. U500LD - This is the main PA board in the transmitter. Under normal operation, no adjustments are necessary. In the unlikely event that a power transistor has to be replaced, the bias adjustments should be reset to insure optimum operation of the transmitter. The following procedure should be followed when making bias adjustments:

a. b. c. d. e. f. g. h. Remove the PA1K amplifier assembly from the transmitter and set it up on a sturdy work bench. The bench should be equipped with a 32 VDC power supply with current capacity of 10 Amps. A VOM will be required to measure the voltage drop across the precision resistors located on the monitor board. Attach 50 ohm load resistors to the input port and one to the output port. If this is not done, severe damage to the PA is possible resulting in costly repair. Connect the 32 VDC supply to the DC terminals. DO NOT TURN THE POWER SUPPLY ON AT THIS TIME. Locate the circuits where bias adjustments are necessary. Adjust only those circuits where service was performed. Turn the bias adjustment POT's fully counter clockwise You will find two (2) POT's for each power device with one on each gate. These are small SMT components and require gentle handling. Locate the current sense resistors on the monitor board. This is a 2 watt .01 ohm precision resistor. There is one for each device. Turn the power supply on and measure the +DC to ensure that it reads +32 VDC. Measure the voltage drop across the precision resistor. This should read zero (0) VDC. Increase one of the bias POT's slowly till the meter reads 0.009 volts. Increase the second POT until the reading is 0.018 volts. This completes the adjustment. Repeat the adjustment above as necessary to set all circuit that have been serviced. NOTICE: DO NOT USE THE BIAS CURRENT INDICATED ON THE MONITOR PANEL OF THE ADP500 TO MAKE BIAS ADJUSTMENTS. Page 33 PINEAPPLE TECHNOLOGY, INC. UTX3K ULTRA Operating and Service Manual VIII -- ADJUSTMENTS AND TUNING VIII --- ADJUSTMENTS AND TUNING (Page 2 of 2) 4. 5. 6. 7. PA PALLETS - These circuits are "FIXED TURNED" and do not require any field adjustment. Any questions regarding pallet adjustments should be referred to the factory. PHASE MATCHED CABLES - If it becomes necessary to replace one of the phase matched cables, contact Pineapple Technology, Inc. for replacements. These cables are the ones connected to the input and output ports on the PA1K. OUTPUT POWER - The transmitter output power measurement is made using a calibrated wattmeter provided with the transmitter. No adjustments are necessary here. GAIN & PHASE MATCHING - Under normal conditions it is not necessary to make any gain or phase adjustments in the transmitter. This transmitter is equipped with provision to adjust phase and gain to ensure minimum power loss in the dump load and maximum forward transfer power to the antenna. Contact Pineapple Technology, Inc. for details if this becomes necessary. Page 34 Section IX Problem Solving

Troubleshooting PINEAPPLE TECHNOLOGY, INC. UTX3K ULTRA Operating and Service Manual IX -- PROBLEM SOLVING/TROUBLE SHOOTING IX - PROBLEM SOLVING & TROUBLE SHOOTING (Page 1of 3) The UTX3K ULTRA is a "MODULAR ASSEMBLY" where most of the sub-assemblies can be removed and or replaced as necessary to maintain full service. To service this transmitter, it is best to become familiar with the various sub-assemblies by reviewing the transmitter block diagram and it's associated subs shown in the introduction. Any work performed on a transmitter licensed by the FCC must be performed by qualified personnel. FAILURE ANALYSIS STARTS WITH THE FOLLOWING ASSUMPTIONS:

1. The transmitter is connected to an AC source which is within the specified voltage range and has ample power to run the transmitter. 2. The antenna has been checked out and a proper match has been verified. 3. The room temperature is < +35 degrees Celsius (+95 degrees Fahrenheit) 4. There are no restrictions in the air flow in or out of the building. 5. The video and aural signals to the modulator comply with stated specifications. CHECKING THE WARNING LIGHTS There are several warning signals visible on the front of the transmitter that will alert the technician of possible problems. When viewed from the front, all the lights should be GREEN indicating normal operation. An alert signal is indicated by a RED light. We will focus on RED alert signals in this section. MFA2PA ASSEMBLY FAN FAULT RED indicates that the fuse supplying AC to the fan has failed. The fuse is located just inside the front panel near the top. CHECK: FUSE AND/OR FAN DC SUPPLY RED indicates a loss of +32 VDC to PA CHECK: DC supply voltage to the rear of the PA1K CHECK: DC supply fuse located on the Fuse panel located at the bottom of the rack in the rear. CHECK: AUX panel location in the bottom half of the rack being checked for proper voltage and current readings NOTE: If all the ALERT lights are on in a given rack, this could indicate that a breaker has tripped CHECK: Circuit breakers located on the front of the ACDIS2 or the sub-panel breaker located at the MAIN AC supply. Page 35 PINEAPPLE TECHNOLOGY, INC. UTX3K ULTRA Operating and Service Manual IX -- PROBLEM SOLVING/TROUBLE SHOOTING IX - PROBLEM SOLVING & TROUBLE SHOOTING (Page 2of 3) SHUTDOWN RED indicates that the PA has been "SHUTDOWN". There are two possible reasons for this:

1. Heat Sink over temperature thermostat has tripped protecting the PA CHECK: Air inlet filter for possible restrictions to air flow CHECK: Fan air flow for possible fan fault CHECK: Room temperature Note: Heat sink over temperature fault is indicated by the RED alert light going ON/OFF in cycles varying in duration depending on air flow. The PA returns to normal operation automatically when the problem is corrected. 2. Remote Shutdown by external signals coming from other protection circuits. CHECK: Transmitter global protection circuits. ADP500 MONITOR The ADP500 is a general purpose test instrument used to display PA status and measure voltage, current and RF power levels. When combined with the PAS4 it is possible to measure the current being drawn by each PA RF Device. In addition to its measurement features, it serves to integrate fault signals for PA Assemblies, High VSWR alarms and provides an interface to the RM8 Remote Control Unit. The ADP500 is a diagnostic tool for troubleshooting the transmitter. With normal operating conditions, all the LED's on the front panel are GREEN. Red LED's could indicate a fault in the transmitter that require attention. RF PWR OFF LED is RED Will occur anytime the "SHUTDOWN LINE" (SD) is set to zero (0) volts. The following conditions will pull the set SD to zero volts:

ANT VSWR HIGH LED is RED 1. Antenna VSWR HIGH 2. PA INHIBIT SWITCH actuated. This indicates that the antenna reflected power exceeded the set trip point. This is an internal setting performed at the factory and is normally set to 10% of the RF OUTPUT POWER set point. CHECK: The transmitter output connections and antenna for possible faults. The fault condition will automatically reset when the problem is corrected. Page 36 PINEAPPLE TECHNOLOGY, INC. UTX3K ULTRA Operating and Service Manual IX -- PROBLEM SOLVING/TROUBLE SHOOTING IX - PROBLEM SOLVING & TROUBLE SHOOTING (Page 3 of 3) PA1 - PA5 LED's are RED This will indicate that the PA Pallet currents are below the 500 ma set point. This can occur when the PA Power device has failed. CHECK 1: Select the PA device in question for current display on the multi-meter. Compare the reading to the station log. If abnormal, it is possible that a power transistor has failed. NOTICE: PA5 will go RED when the INHIBIT SWITCH is actuated. CHECK2: To confirm a failed device, it is necessary to shutdown the transmitter and remove the PA1K power amplifier assembly and check the device in question. Use a VOM to check the resistance from the gate of each 1/2 of the device to ground. If either reading is below 1K ohm it is likely that the device has failed. POWER SUPPLY MODULE LED RED The Power Supply Module has two warning LED's located on the front panel. Normally these LED's are GREEN indicating that the AC Line voltage and the OVER VOLTAGE circuits are operating properly. If either LED turns RED the module is question will be turned off and is no longer supplying power to the transmitter. These modules are "HOT PLUGGABLE" and can be removed from active service by simply removing it from the main frame. Pineapple Technology, Inc. does not recommend any attempt to service these modules. Any attempt to service may void factory warranties. Return the module to Pineapple Technology, Inc. or to the manufacture for service. NOTICE: If it becomes necessary to operate the transmitter with a missing supply module, very little if any performance degrading will be experienced. Check the AUX volt meter for any indication of a drop in voltage (normally 32 VDC). This drop is caused by the power supply modules going into

"CURRENT LIMIT". It is important that the voltage be around 32 volts 0.5. If the voltage falls below this point, it can be recovered by reducing the RF Drive level a small amount in most cases. This should be done only with the DUMP LOAD MONITOR on and indicating that the maximum power is not exceeded. Page 37 Section X Warranty PINEAPPLE TECHNOLOGY, INC. UTX3K ULTRA Operating and Service Manual X -- WARRANTY X -- WARRANTY The WARRANTY provided by Pineapple Technology, Inc. (PTI) on this transmitter is detailed below. It should be noted that some of the equipment sub-systems have warranty coverage by the orginal manufacture that differs from the standard warranty provided by PTI Warrantydetails on equipment falling into this category may be found in the Manufacturers instruction manual provided with the transmitter. In all cases, replacement units of this equipment are normally in stock at PTI for quick turn service support to our customers during the PTI Standard Warranty period. STANDARD WARRANTY Seller warrants that each Product sold by it is free of defects in materials and workmanship. Seller's obligation under said warranty continues for a period of one (1) year from date of shippment. Repairs or replacement of defective parts shall be the sole and exclusive remedy under waranty, at Seller option, provided that Seller may, as an alternative, elect to refund an equitable portion of the purchase price of the product. THIS WARRANTY IS EXPRESSLY IN LIEU OF AND EXCLUDES ALL OTHER EXPRESS OR IMPLIED WARRANTIES, INCLUDING BUT NOT LIMITED TO WARANTIES OF FITNESS FOR A PARTICULAR PURPOSE, USE, OR APPLICATION, AND ALL OTHER OBLIGATIONS OR LIABILITIES ON THE PART OF THE SELLER, UNLESS SUCH OTHER WARRANTIES OBLIGATIONS OR LIABILITIES ARE EXPRESSLY AGREED TO IN WRITING BY SELLER. WARRANTY REPLACEMENT AND REPAIRS All claims under warranty must be made promptly after occurrence of circumstances giving rise to thereto and must be received within the applicable warranty period by seller or its authorized representatives. Such claims must be documented on a PTI* Field Failure Report with a full description of the circumstances giving rise to the claim. Before any products are returned for repair and/or adjustment, written authorization form seller or its authorized representative for the return and instructions as to how and where these products should be shipped must be obtained. This is to include a Return Authorization (RA) number provided by the seller or authorized representative, this must accompany ALL returns. Any product returned to the seller for the examination shall be sent prepaid via the means of transportation indicated as acceptable by seller. Seller reserves the right to reject any warranty claim not promptly reported and any claim on any item that has been altered, i.e. circuit modifications, components removed, or has been shipped by non acceptable means of transportation . When a product has been returned for examination and inspection, or for any other reason, customer shall be responsible for all damage resulting from improper packaging or handling, and for loss in transit, notwithstanding any defect or nonconformity in the product. In all cases the seller has sole responsibility for determining the cause and nature of the failure, and the Seller's determination with regard thereto shall be final. If it is found that Seller's Product has been returned without cause and is still serviceable, customer will be notified and the Product returned at its expense, in addition, a charge for testing and examination may, in Sellers sole discretion be made on Products so returned.

* A field Failure Report is included at the end of this manual - Additional Field Failure Reports can be obtained by calling Pineapple Technology, Inc. at (916) 652-1116 or you may download one from our website at www.ptibroadcast.com in the Warranty section. Page 38 Section XI Extended Warranty