BROADCAST CARRY-CODER MICROWAVE User Manual MUU SERVICES, INC. 3.3 Changing Operator Menu parameter values When changing an operating parameter, line 2 describes the parameter and line 3 offers the available choices:
RF OUTPUT POWER LOW MID HIGH MAX The cursor (underscore) shows that the transmitter output is switched off. The operator can change the current condition (displayed line 3) by using the Left Arrow < < > or Right Arrow < > > keys, moving the cursor under the desired transmit output power level, followed by pressing the < OK > key to accept the chosen parameter. If the user doesnt confirm his choice by pressing the < OK > key, or uses the Up Arrow < 4 > or Down Arrow < V > keys, the operating parameter change is cancelled; the current parameter is not modified. This is a convenient escape feature. Certain operating parameters are entered values (not multiple choice). For example, the frequency is displayed as follows:
FREQUENCY 2454.25 MHz To change the current value of this parameter, the operator presses < OK >, entering the Menu Edit mode, so the cursor appears under the first figure of the displayed frequency, as follows:
FREQUENCY 2454.25 MHz The frequency value is changed by the following steps: (1) move the cursor to the appropriate figure using the < < > and < > >
keys; (2) increment or decrement the selected figure using the < 4. > and < V > keys. For example:
FREQUENCY 2450.25 MHz The frequency value to the right of the decimal point is a fractional MHz value, selected in steps of 250 KHz (.25 MHz). Repeat the operation (previously described) to increment or decrement this value. To increment to a frequency of 2450.50 MHz, move the cursor to the right of the decimal point, then press the < 4 > one time:
[FREQUENCY 2450.50 MHz After modifying all of the necessary digits, the operator must validate the chosen frequency by pressing < OK >, closing the Menu Edit mode, changing the operating frequency. FREQUENCY 2450.50 MHz
\ | /, \fyou make a mistake while setting a number and you want to restore the previous value, dont validate your modifications: simply wait during 30 seconds without touching the keypad. The system will automatically exit the edit mode without saving the modifications; the display returns to the status screen. 6051397800 Rev A Page: 11 BROADCAST CARRY-CODER MICROWAVE VV SERVICES, INC. User Manual 3.4 Setting Transmitter Operating Frequency CARRY-CODER II using direct frequency entry: the RF frequency is set as follows:
2454.25 MHz FREQUENCY 2454.25 MHz The frequency display is expressed in MHz with 250 kHz tuning steps. The frequency value corresponds to the center of the 8 MHz RF channel that is used for transmission. If the user tries to enter a value which is not in the operating frequency range, an Out of range message is displayed and the current frequency value is not changed. CARRY-CODER II for Broadcast , the RF operating frequency is set using the channel plan with frequency offset::
CH 3- 2029.25 MHz FREQUENCY 2101.50 MHz The US channels table and corresponding frequencies is the following :
___|Frequency
|CH14- | 1994.75 MHz
[CH2- [2012.25 MHz CH2+ [2020.75 MHz CH5c 2067.50 MHz 2071.75 MHz 2080.25 MHz 2084.50 MHz 2088.75 MHz 2097.25 MHz 2101.50 MHz 2105.75 MHz 2454.25 MHz 2458.50 MHz 2462.75 MHz 2471.25 MHz 2475.50 MHz 2479.75 MHz 2487.75 MHz 2492.00 MHz 2496.25 MHz on
CH6 -
CH6c CH 6 +
CH 7 -
CH7c CH7 +
CH 8 -
CH 8c OO
|x
|00 1) +
OHO;QO;OIO Lj) | x
/-2/-140} co DOJO} elo
+10]!
Se 6051397800 RevA Page : 12 BROADCAST CARRY-CODER MICROWAVE User Manual YW SERVICES, INC. 3.5 Setting Transmitter Output Power The RF power is set through the following menu:
RF OUTPUT POWER
| OFF LOW MID HIGH MAX The following table gives the RF power (real average COFDM power) corresponding to each setting, accompanied by the resulting power supply consumption :
MID [100mW_ sf Low(about30W) HIGH 250 mW Normal (about 40 W Normal (about 40 W
\ | /, When the CARRY-CODER is close to the receiving antenna (< 25m) you can try to reduce the RF output power to io; MIN or MID level. It saves the batteries and can improve reception (avoiding receiver overload). 3.6 Setting Transmission Mode and Robustness The CARRY-CODER II includes 3 pre-defined modes, characterized by defined transmission robustness. These 3 pre-defined modes have been configured to provide the best trade-off between transmission robustness, video quality and end-to-end delay for typical applications of the CARRY-CODER. These modes can be selected through the following menu:
ROBUSTNESS LOW MID HIGH The detailed characteristics of these modes are:
Mode (Tx Robustness) COFDM Guard Interval
\ | /, When changing to the < HIGH > robustness condition, take the following steps: (1) Select < HIGH > mode, then press
~_Y <OK>; <2 > wait for the system to re-initialize then press < OK > once again. i 6051397800 RevA Page : 13 BROADCAST MICROWAVE CARRY-CODER User Manual
/ SERVICES, INC. The following table suggests which (factory defined) robustness mode to use certain applications:
Mode (Tx Robustness) _| Preferredapplications == = =~=~~~*<([Characteristics 2 23 2 2
| Studio Short transmission range. LOW , Maximum video qualit News, sports, entertainment. Medium transmission range.
| Mobile & airborne transmission (with. Long and/or difficult transmission. HIGH walls or buildings in the path. Normal video quality.
\ | /, The operator can define specific operating parameters (compression and transmission) via the EXPERT mode. When
. the CARRY-CODER II is in the EXPERT mode, the Robustness menu is disabled and the 3 pre-defined modes are replaced by a message saying: Expert Config. 3.7 Recalling and Saving Operating Configurations The CARRY-CODER II provides the operator with the ability to save and recall 8 user-defined presets (configurations). These configurations are non-volatile (saved in an EEPROM) and are not lost when the system power is switched off. Each configuration contains all of the CARRY-CODER operating parameters, so that recalling a user-defined configuration will restore the system exactly in the same state as when it was saved. Preset (stored) configurations are recalled using the following menu:
RECALL CONFIGURATION 123456789 To recall a configuration the user should select one of the preset memories, as above, then press < OK >. Custom configurations are saved to memory using the following menu:
SAVE CONFIGURATION 123456789 To save a configuration the user should first set the appropriate operating parameters to the desired state, then select one of the preset (configuration) memories. In the following example, preset memory 2 is selected.:
SAVE CONFIGURATION 123456789 Then, press < OK > to save the configuration to the selected preset (memory): The Menu Edit mode is completed. SAVE CONFIGURATION 123456789 Be careful when recalling configurations: If a preset configuration includes RF OUTPUT POWER active, the CARRY-
CODER II finishes ts initialization and transmits on the RF frequency that is saved in memory! In order to follow accepted practice and to avoid unwanted transmission, good practice recommends that the preset configurations are saved with the <RF Output Power> setting in the < OFF > condition. eee 6051397800 RevA | Page : 14 BROADCAST CARRY-CODER MICROWAVE WV SERVICES, INC. user Manua 3.8 Setting Video Input Parameters and Video Mode The video input type is set through the following menu :
VIDEO INPUT CVBS YUV SDI ASI _ The operator can choose:
e CVBS : Composite Video Baseband Signal e YUV: Component video e SDI: Serial Digital Video e ASI: Transport
(_ If there is no signal on the selected input, the CARRY-CODER 1 displays a No video warning message and will not
= ~s transmit. The video input standard is set through the following menu :
VIDEO MODE PAL NTSC The user can choose between :
e PAL (625 lines, 50 Hz) e NTSC (525 lines, 60 Hz) ON 6051397800 RevA Page : 15 BROADCAST CARRY-CODER
) MICROWAVE User Manual Y SERVICES, INC. 3.9 Setting Audio Input Parameters and Audio Level The audio input mode is set through the following menu :
AUDIO INPUT ANALOG AES SDI Operator choice includes:
e ANALOG: analog audio (line level) e AES: digital audio (AES/EBU format) e SDI: (to be enabled) The Operator can adjust the left and right audio level from 10 dBu to +4 dBu, via the following menus :
AUDIO LEVEL LEFT
+ 3 dBu AUDIO LEVEL RIGHT
-6 dBu For instance, setting a value of -6 dBu means that the CARRY-CODER II is adjusted for a nominal input level of -6 dBu. This ensures headroom for A:D (analog-to-digital) conversion of approximately 18 dBFs (relative to full scale). When the nominal audio input level is below the value that is set, the system will operate correctly, but the signal-to-noise ratio will be degraded and the nominal audio output level on the receiving side will, in like manner, be low. lf the nominal audio input level exceeds the set value, expect digital clipping to occur. If the nominal audio input level exceeds the absolute maximum value of +4 dBu, the audio signal will be heavily clipped and there will be significant loss of audio quality. 3.10 Configuring Data Input (RS-232) The CARRY-CODER II provides an RS-232 input port that can be used for asynchronous user data transmission (i.e. for sending the transmitters GPS-derived location data to a receiver tracking antenna system). The RS-232 input is configured through the following menu:
DATA PORT BAUD RATE 1.2 4.8 9.6 3.11 Configuring Transmission privacy The CARRY-CODER II offers the choice of enc is controlled through the following menu:
ENCRYPTION OFF ENTER PIN To activate signal encryption, the operator selects this menu function then presses < OK > to enter the Menu Edit mode. This operation uses a 6 digit encryption code. Both the transmitter and the receiver must have the same PIN encryption code in memory. If not, the DC II receiver will indicate <BAD ENCRYPTION>: the receiver will demodulate the signal, but it will not provide valid audio, video or data output. Once an encryption code is stored, the operator cannot read the setting of the code: if the code is not on record, the operator must change to a new encryption code or set Encryption to < OFF >. 6051397800 Rev A Page : 16 rypting the transmitted signal in order to ensure the privacy of the link. This feature
"= BROADCAST CARRY-CODER
) MICROWAVE WU SERVICES, INC. user Manual The PIN code is only visible when you enter it. If you forget the PIN code of one device, the simplest solution is to enter a new PIN code for both the transmitter and the receiver. All six digits set to < 0 > result in no encryption The (first generation) CARRY-CODER | (CC |) and the DE-CODER | (DC |) receiver uses four digit PIN encryption. When the CARRY-CODER II transmitter is used with the DE-CODER | receiver, the CARRY-CODER II encryption is compatible if the PIN encryption setting has the first two PIN digits set to <O> (i.e., PIN setting <001234> on the CC II or DC II will work with PIN setting
<1234> on the CC | or the DC I>. 6051397800 RevA Page : 17 BROADCAST CARRY-CODER
) MICROWAVE 1 SERVICES, INC. User Manual 4. USING EXPERT MODE The CARRY-CODER II has two modes of operation. (1) The NORMAL mode provides the operator with control of system functions that are needed in routine portable camera situations. Section 3 of this manual describes these functions, including three factory preset configurations. (2) The EXPERT mode enables the operator to selectively adjust key (audio and video) compression and COFDM transmission parameters. The EXPERT mode should be used carefully because specific parameter settings are required to ensure proper operation of the system. This mode should be reserved to advanced users. The expert mode is activated through the following menu :
USER MODE NORMAL EXPERT
The Expert Mode gives access to the expert audio-video and COFDM parameters that are described in the next sections. 4.1 Expert audio-video parameters Recommendations The video quality mainly depends upon the allocated video bit rate and is closely linked to picture resolution and Group Of Picture structure. PIP 11-15 Mb/s Maximum Resolution (D1) RESOLUTION 1/1 % 2/3 1/2 This parameter controls digital picture resolution (pixels per line) used for MPEG-2 encoding. A high MPEG-2 encoding Bit rate provides greater resolution for the best video quality. A low MPEG-2 encoding Bit rate provides lower resolution, reducing the 6051397800 RevA Page : 18 BROADCAST CARRY-CODER MICROWAVE User Manual Vv SERVICES, INC. ser lman GOP Structure GOP STRUCTURE
| IP IBP IBBP This parameter controls the structure of picture groups used in the MPEG-2 encoding process. These groups are based on three possible picture types:
e I: Intra-frames (completely encoded). P: Predicted-frames (using motion estimation). e B: Bi-directionally estimated frames (using motion estimation). This parameter has a direct affect on video encoding delay. For a given Bit rate:
IBBP and IBP frame modes offer good video quality in difficult ttansmission conditions. e IP frame mode offers a good compromise between video quality and near-line-of-sight conditions. e _ |-frame mode offers the same encoding delay as IP mode, with high Bit rates to ensure the greatest video quality. GOP Length GOP LENGTH 6 12 18 24 ing efficiency and transmission error tolerance. A high case recovery time required by the MPEG2 decoder The value is expressed in terms of full frame pictures. The typical value is 12. 4.2 Expert COFDM parameters You can find some information about COFDM modes characteristics in Annex A. The COFDM mode is controlled by adjusting certain COFDM parameters, described below. Constellation CONSTELLATION QPSK _16QAM 64QAM Guard Interval GUARD INTERVAL 1/32 1/16 1/8 %
BROADCAST CARRY-CODER
) MICROWAVE User Manual VV SERVICES, INC. 5. INPUT/OUTPUT CHARACTERISTICS 5.1 Composite video (CVBS) Type Composite Video Baseband Signal (CVBS) Systems NTSC 525 lines / 60 Hz / Foy = 3.58 MHz PAL 625 lines / 50 Hz /Fsc = 4.43 MHz Standard ITU-R BT 470-6 impedance 75 Ohms 5.2 Component video (YUV) Type YUV (formerly Y / Pb / Pr) Systems NTSC 525 lines / 60 Hz PAL 625 lines / 50 Hz Standard ITU-R BT 470-6 Impedance 75 Ohms 9.3 Analog audio Type Balanced Line Channels 2 separate channels (Left and Right) Nominal input level Adjustable from 10 dBu to +4 dBu (0 dBu = 775 mV) Headroom 12 dB (analog) 18 dBFs (digital) Sampling frequency 48 kHz 20 bits Frequency response 30 Hz 20 kHz (+/- 1dB) Signal-to-Noise Ratio 65 dBA Diaphony 60 dBA Total Harmonic Distortion < 0.1 % @ 1kHz Impedance > 10 kOhms WY lf a low impedance input (600 Ohms) is required, the user can make a specific interface cable with 600 Ohm resistors between the +/ lines of balanced audio conductors. 5.4 Data input Type RS-232-DCE Possible Bitrates 9600, 4800 and 1200 bauds (selectable) Format N, 8, 1 (1 start bit, 8 data bits, 1 stop bit, no parity) Protocol None (no XON/XOFF) 9.5 Remote control port Type RS232 Bit rate 9600 Bps Format N, 8, 1 (1 start bit, 8 data bits, 1 Stop bit, no parity) Maximum cable length 100 m Format and protocol Proprietary It is recommended to use a shielded DB9 cable in order to increase reliability. 6051397800 Rev A Page : 20 CARRY-CODER
) MICROWAVE
| User Manual W SERVICES, INC. ne ane 5S. RF output Type S-band Frequency range 1.99 to 2.50 GHz Channel bandwidth 8/7/6 MHz Format COFDM (2K carriers) Standard ETS 300 744 (DVB-T) Output power 50 mW, 100 mW, 250 mW and 1W (selectable) Shoulders at +/- 4.2 MHz > 30 dB for 1W
> 35 dB for 250 mW or less Harmonic and spurious < -60 dBc (DC to 6 GHz) In-band ripple < +/- 1dB Return Loss 18 dB (typical) Impedance 50 Ohms Connector N - Female Never use the CARRY-CODER without 50 Ohms load or antenna properly connected to the RF output, Since this could damage the RF output stage.
\l4 The system can operate with several COFDM signals located on 8 MHz adjacent channels. When analog
~/ transmissions are active in-band, it is recommended to leave a free 8 MHz channel between COFDM
~ signals and the active analog signals. 9.9 Power supply input The CARRY-CODER can be powered either with a battery pack or through a 4 pins connector. This enables the use of an external Power source such as a battery belt or any appropriate power supply (+11 to 32 VDC - 4A). 6051397800 Rev A Page : 21 BROADCAST CARRY-CODER y MICROWAVE User Manual SERVICES, INC. 6. WARRANTY AND RETURN TO FACTORY The CARRY-CODER is warranted for a 2 years period, starting from delivery date. In case of CARRY-CODER failure, please use the following process:
___- Contract Number or Customer Name
<_ BMS Part / Model Number _ Serial Number Description and special a customer related specification. e Customer Name e Contract Number e BMS Model Number e Serial Number e Description of problem with as much detail as possible. e Name of person to contact who might have further information on the failure. |
e Contact information such as phone number and/or email address. e Return Information e Contact BMS technical support. There are no user serviceable parts inside the CARRY-CODER. Trying to open the device without prior authorization from BMS will cause the warranty loss. 6051397800 Rev A Page : 22 BROADCAST CARRY-CODER
) MICROWAVE W SERVICES, INC. User Manual 7. CONTACT INFORMATION Broadcast Microwave Services, Inc. Phone: +1.858.391.3050 Fax: +1.858.391.3049 Shipping address: 12367 Crosthwaite Circle Dock 10 Poway, CA 92064 Website: http://www.bms-inc.com Email: Support@bms-inc.com sales@bms-inc.com 6051397800 Rev A | Page : 23
"BROADCAST CARRY-CODER
) MICROWAVE Wn SERVICES. INC. User Manual ANNEX A : COFDM modes characteristics The main COFDM modulation parameters are :
Number of sub-carriers (about 2.000 in our case) e Guard interval (GI) duration between COFDM symbols e Constellation scheme used for individual sub-carrier modulation e Data redundancy code rate used for error correction The following table gives the useful transmis sion bit rate for each COFDM mode. It also specifies the Carrier-to-Noise operation limit in the case of a perfect line-of-sight (Gaussi an) channel and in the case of a typical multipath terrestrial (Raylegh) channel. Constellation | Code |
WY eo We can notice that a low code rate (=
multipath environment. fo high data redundancy) is necessary to insure a good efficiency in