Operations Manual VETA Monitor Receiver (VMR)
Contents
1. The OFDM polarity of normal or invert is usually selected based on the polarity of the transmitter signal and on the down converter parameters Down converters using high side injection invert the polarity of the incoming signal Down converters with Low side injection do not invert the polarity For example if the transmitter is set for normal inversion and the down converter at the VMR side uses low side injection then the normal OFDM polarity is selected The BDC Power option turns ON or OFF the VDC on the IF line to the internal BDCC As mentioned before BDC power must be on for the VMR 100 M0103X2 17 of 26 GMS Inc doing business as Cobham Tactical Communications and Surveillance www cobham com tcs F BDC Settings Fi LO frequency must be entered in MHz Choose between High or Low side injection Revr 1 Down Converter LO E200 MHz Reve I Down Lane LO Side High BDC Power ON F BOC Gain Setting 20 0000 Turns 12VDC ON or OFF on the IF line Enter gain of the BDC Figure 7 BDC Control Screen 100 M0103X2 18 of 26 GMS Inc doing business as Cobham Tactical Communications and Surveillance www cobham com tcs 5 Software Control Configuration control and monitoring of the VMR are enabled through the use of Cobham Tactical Communications and Surveillance optional sold separately MS Windows based VMR Configurator software program Cobh2. vinput kevaAsy ted Input Lev B h Input Lev C Input Lev D Demod Loek TPS Lock FEC Lock Constel Mod 8MHZ PreUit Err PostUit Err Packet Err SNR A SNR B SNR C SNR D Figure 5 VMR OSD 100 M0103X2 14 of 26 GMS Inc doing business as Cobham Tactical Communications and Surveillance www cobham com tcs 4 1 1 Mode Button Pressing the Mode button toggles the diagnostic On Screen Display OSD Pressing the mode button will toggle the OSD on with the spectrum display showing input from the Composite Video output port Pressing the mode button a second time will change the spectrum display to input B Pressing a third time will turn the OSD off The diagnostic data displayed on top of the current video includes signal to noise data input power level frequency as well as some captured parameters from the incoming RF signal as shown in Figure 5 4 2 VMR SIDE PANEL The side panel contains the connectors necessary for interfacing to the VMR Detailed descriptions of all the VMR connectors and components see Figure 6 are included in the following sections 4 2 1 Power Switch The Power Switch located on the far right side of the panel enables 12VDC to the system it has three positions BATT power supplied from Battery OFF and EXT power supplied from External Power supply via 4 pin XLR On powering the VMR one of the eight green configuration LED s will light up the last one that was active when the VMR power
3. 4 22 Communications DB 9 F Connector 16 4253 TEE EE N OE 16 ALA AR EE OE are eee 16 4 2 5 External Dower 17 426 RE CONNECTIONS seede 17 4 3 Using Internal Down Converters sss 17 5 Software Control 19 6 Special NS RE ee ee oe ek eee Oe 20 61 EOEDMERE TNB 20 62 DEMODULATION esse sees ee ee ee ee ee ee ee ee ee ee ee ee ee 20 63 VIDEO DECODING 2 20 64 AUDIO DECODING ie ee ee ee ee ee ee ee ee ee ee ee ee 21 OG POWER Ge Ge GE Ee Ee O 21 O6 PAN 21 67 Emviorimerital missie ra Ge GE Re er 21 6 8 RS232 DATA OUTPUT 21 69 CONTRO sai PT ee ee Ee er 21 6 10 REMOTE CONTROL 21 6 11 LOCAL MONLITORING ee EE EE N GE N ee RE EG Ee EE 22 6 12 REMOTE MONITORING 22 100 M0103X2 2 of 26 GMS Inc doing business as Cobham Tactical Communications and Surveillance www cobham com tcs ol FUN OP TION ie E Ge GE EE E E ee ee 22 List of Figures el 10 Fi are 2 MR TOD e E nee ee ene ae eee 12 Figure 3 VMR Monitor Controls 12 FT NNN 13 Fieiie os II 14 Foue 6 VR ide VEN en ee EG ee EE N 15 Figure 7 BDC Control Kan 18 List of Tables Fe 14 Table 2 Communications Connector ee ee ee 16 Table 3 Video Connector 16 Table 4 Audio ConnectiOnsS ee ee 16 Table 5 External POWET ee ee ee ee ee ee ee ee 17 Table 6 RF Connections 17 List of Appendices Appendix A Troubleshooting Section LED Indictoars sse 23 MTV D gt EA OR EE N N EE ER O AEE 24 Appe
4. II Musicam or NICAM User Selectable ISO IEC 13818 3 Musicam 256 Kbit s ch Musicam All bitrates supported 32 kHz or 48 kHz Musicam 12 or8 32 KHz 16 KHz or 8 KHz 200 Hz to 10 KHz 1 0 dB Analogue Un balanced outputs Line Level lt 100 Ohms Unbalanced RCA 9 18 V lt 28 Watts 12 2 W x 3 5 D x 6 5 H 30 9 cm W x 8 89 cm D x 16 51 cm H 5 5 Ibs 2 5 kg 1 to 40 deg C Up to 115 k baud DB 9F Front Panel with 16 channel mode select Preset key selection 1 16 All receiver options and functions are controlled set via the remote interface 100 M0103X2 GMS Inc doing business as Cobham Tactical Communications and Surveillance 21 of 26 www cobham com tcs 6 11LOCAL MONITORING Control Panel Signal Strength Bar Graph Channel amp Mode and Rx Lock invalid Encryption Key OSD Signal to Noise Ratio SNR Pre and Post FEC Bit Error Rate BER and Packet Errors 6 12REMOTE MONITORING All RX measurements and controls 6 13 SECURITY OPTION ABS is standard The VMR can optionally be provided with Advanced Encryption System AES or B crypt 128 or 256 for protecting the signal in sensitive applications 100 M0103X2 22 of 26 GMS Inc doing business as Cobham Tactical Communications and Surveillance www cobham com tcs Appendix A Troubleshooting Section LED Indictors LED condition Meaning Action No Config LED s lit Unit is OFF ae oe ESE Indicate
5. VDL VETA Digital LINK wireless link Figure 1 shows a basic VETA configuration wireless link The VMR shown below has the standard default internal down converters The steps necessary to setup the configuration shown are stated below gt Install omni directional antennas or ones best suited for the application onto the RF INA and RF IN B ports on the VMR and one on the SMA RF connector on the Veta transmitter gt Attach the VT VETA transmitter power cable and apply 12VDC to the red pigtail and GND to the black pigtail Ensure power supply can supply at least 2 5A at 12VDC gt Attach a composite video source to the BNC video input cable that is located on the VT breakout cable and turn it on gt Note which VT Configuration LED 1 through 8 is lit above the CONFIG button this number must match the receiver assuming that both VT and VMR have default parameters gt Press the RF button on the VT to insure that RF signal is On gt Apply 12Vdc to the VMR gt Turn on the VMR with the PWR switch on the front panel up is ON for Battery and down for external Power Supply through 4 pin XLR gt The VMR is wired such that the decoded video is fed directly into the monitor gt Ensure the selected green LED1 through 8 above the CONF button on VMR and VT match If not use the CONF button to select the correct configuration or change actual parameters using Control Software 100 M0103X2 9 of 26 GMS Inc do
6. range and larger quantity of simultaneous A V links to operate in the same frequency band The wider bandwidths provide greater throughput that allow the system to transfer the highest quality video The standard VMR is supplied with dual Diversity inputs and internal RF Block Down Converters BDC s with a user selected frequency band The VMR s Maximal Ratio Diversity Combiner provides optimum reception in difficult fading and multipath environments One of the biggest problems encountered in the transition from analog to digital A V systems has been the inherent digital coding decoding delays that in some digital systems are 400ms or more The VETA Transmitters amp Receivers employ internal MPEG 2 or MPEG 4 User Selectable Encoders and Decoders with specially designed low delay coding technology which provides an end to end latency down to 44ms without the introduction of any further MPEG encoding artifacts This ensures that the picture you see is what is happening now crucial for applications such as surveillance and law enforcement where personnel are reacting to real time events Control and status monitoring can be accomplished via the VMR s Rx Control Panel Top of Unit or via an external IBM PC and Cobham Tactical Communications and Surveillance s M S Windows application control software Critical performance parameters like Signal to Noise Ratio SNR Pre and Post FEC Bit Error Rate BER and Packet Errors are provided b
7. was turned off In addition the red Alarm LED will light if the VMR is unable to lock to a RF signal Figure 6 VMR Side View 100 M0103X2 15 of 26 GMS Inc doing business as Cobham Tactical Communications and Surveillance www cobham com tcs 4 2 2 Communications DB 9 F Connector The Communications I O DB 9 connector provides RS232 control The receiver can be controlled remotely with Cobham Tactical Communications and Surveillance PC control software refer to Software Control Manual using RS232 protocol The pins and their functions are described in the table below Table 2 Communications Connector Connector Connector Type i Function Name I O DB 9 F RS232 GND I O DB 9 F CTRL TX 4 2 3 Video One composite video out 75 ohm impedance PAL NTSC standard is provided Table 3 Video Connector Connector Name Connector Type Comments i EG 4 2 4 Audio Two RCA connectors are provided for audio output The output level is nominal line level with output impedance of 50 ohm Audio is single ended There are no audio gain adjustments on Receiver Table 4 Audio Connections Connector Name Connector Type Function AUD L RCA LEFT AUDIO AUDR RIGHT AUDIO VMR also has a headphone jack located above the right handle 100 M0103X2 16 of 26 GMS Inc doing business as Cobham Tactical Communications and Surveillance www cobham com tcs 4 2 5 External Power XLR Connector EXT
8. 2 7 of 26 GMS Inc doing business as Cobham Tactical Communications and Surveillance www cobham com tcs Please contact Cobham Tactical Communications and Surveillance for details of packages that can be tailored to meet your individual needs whether they are service availability technical training and local geographic support or dedicated spares holdings 24 Safe Operating Procedures e Ensure that the power supply arrangements are adequate to meet the requirements of VETA product e Operate within the environmental limits specified for the product e Only authorized trained personnel should open the product There are no functions that required the User to gain access to the interior of the product 100 M0103X2 8 of 26 GMS Inc doing business as Cobham Tactical Communications and Surveillance www cobham com tcs 3 Getting Started The VMR is pre configured by Cobham Tactical Communications and Surveillance prior to shipment thus is ready to work right out of the box NOTE Additional cables and antennas may be delivered by Cobham Tactical Communications and Surveillance based on customer application Contact Cobham Tactical Communications and Surveillance for further information 3 1 Initial Checkout Prior to installing a VMR unit into the desired target environment an initial checkout should be performed to ensure proper operation of the unit The initial checkout consists of configuring a basic
9. BW Threshold 100 dBm to 105dBm 6 3 VIDEO DECODING Compression Type Compression Standard Video format standards Profiles Chroma Format Line Standard Horizontal Resolution VETA Systems Latency end to end delay Video Outputs Standards Video Connectors 100 M0103X2 GMS Inc doing business as Cobham Tactical Communications and Surveillance MPEG 2 Field or Selectable ISO IEC 13818 2 with Intra Refresh update mode for low Latency operation NTSC or PAL SP ML or MP ML 4 2 0 or 4 2 2 525 and 625 NTSC PAL 704 528 480 352 pixels Frame Encoding Down to 44ms for 6 7 or 8 MHz Narrow BW to 120mS w VETA TX Only mode dependant 1 Composite w OSD NTSC with and without pedestal or PAL Composite BNC F 20 of 26 www cobham com tcs Output Impedance Output Level Frequency Response 6 4 AUDIO DECODING Number of Channels Decompression Type Musicam Compression Standard Bit rates Sampling Freguency Nicam Ultra Low Latency Bits per Sample Sampling Frequency Frequency Response Audio Outputs Output Impedance Connector 6 5 POWER DC Voltage Range Power Consumption 6 6 Physical Dimensions Weight 6 7 Environmental Operational Temperature 6 8 RS232 DATA OUTPUT Baud Rate Connector 6 9 CONTROL Local Control 6 1OREMOTE CONTROL RS232 Control from PC GUI 75 Ohms 1V p p 10 Hz to 4 MHz 1 5 dB 2 MPEG Layer I amp
10. Operations Manual The most important thing we build is trust VETA Monitor Receiver VMR Cobham Tactical Communications and Surveillance 1916 Palomar Oaks Way Suite 100 Carlsbad CA 92008 100 M0103X2 1 of 26 Tel 760 496 0055 FAX 760 496 0057 GMS Inc doing business as Cobham Tactical Communications and Surveillance www cobham com tcs Table of Contents M R EE RE EE EE EE 5 2 Introduction 6 1 ENO 6 2 2 General System Information mmssssssssessserssserosserssseresssrsssssesssressssesssesesssersssersssersssersssersssersssessssssnssssnses 6 N AE EE EE NE EE EE EE EE EE NEO N ON AA SaleOpeiatiis Pr OC TTT 8 3 GENE SE 3 ee ie eo ee ee ie ee ie ie ee 9 3 1 heh 9 4 Hardware Overview srsssessssessssessssessssessssessssensasensssensesessensnsensnsensnsenessensssensesensssensssensesensenensenensenensenenseneneen 12 4 1 VMR Control NE 12 4 1 1 MON 12 4 1 1 Received Signal Strength Green LED Ks iese eene ee eke ER ee RR ER ee RR ER ee Rek ee 13 42 FO pr 13 At ORMEN ea EE EE ee er era 13 4 12 Alarm Red LED 13 4l Green Config LEDS TN 13 4 14 Cone Button e rssseeseeasseressersseresseresssesseresssassesessevsseressesssssesserssssessesesssrssesessenssssenseresssensesesssessesesssneee 14 115 FRON NN 14 4 1 1 Mode ButtOn cecesccsccscesssssccsecescessecsesscssssessecuesecseceesuessesecsecussucsessecuesucsessecuecussucsecaecuesuceesaecussucasensess 15 AZ VMR SIDE PANEL 15 4 2 1 Power Switch 15
11. X amp RX further apart VT VMR 12VDC Figure 1 Basic VDL Setup 100 M0103X2 10 of 26 GMS Inc doing business as Cobham Tactical Communications and Surveillance www cobham com tcs The initial checkout described above is simply to check the basic video operation of the VMR unit For further details on the connectors monitoring and controlling the VMR read thoroughly through this manual For information on Control Software refer to manual 100 M0131 100 M0103X2 11 of 26 GMS Inc doing business as Cobham Tactical Communications and Surveillance www cobham com tcs 4 Hardware Overview RF connectors of VMR are located on the top of the unit All other interface connectors are located on the side of the unit The control panel located on the top of the unit consists of a VETA standard push button panel and LED indicators VMR also has a separate control panel for monitor control located on the top of the unit below main control The front view side and control panels of the VMR unit are illustrated in Figure 2 Figure 4 and Figure 6 and discussed in detail in this section PROTOTYPE 11V MIN E Figure 2 VMR Top View 4 1 VMR Control Panel The control panel is explained in this section 4 1 1 Monitor Control The Monitor Control is located below antennas and controls the monitor settings like brightness contrast hue etc as well as the sound volume PWR On Off LED PWR Ct
12. am Tactical Communications and Surveillance Part Number for this Software is 8970920 100 This Graphical User Interface GUI program provides the end user with a straightforward way to interface with the VMR unit During normal operation once a VDL link is established the VMR Configurator GUI can be used to monitor the link statistics as well as control the receiver Monitoring the link statistics is an optional operation therefore if desired the VMR Configurator GUI does not need to be active and can be disconnected from the VMR unit For detailed information refer to the manual 100 M0131 100 M0103X2 19 of 26 GMS Inc doing business as Cobham Tactical Communications and Surveillance www cobham com tcs 6 Specifications 6 1 COFDM RF INPUT Input Ports Connectors Input Impedance Input Frequency Frequency Accuracy 6 2 DEMODULATION DVB T of Carriers DVB T Bandwidth DVB T Guard Interval DVB T FEC DVB T Modulation Optional VETA Narrow BW Modes VETA of Carriers VETA Bandwidth VETA Guard VETA FEC VETA Modulation Threshold 6 7 amp 8 MHz BW QPSK V2 16 QAM Vo 64 QAM Vo 2 N F 50 Ohms lt 1 5 1 VSWR 0 174 to 8 5 GHz In Bands 10 ppm 2k 8 71 6 MHz 1 32 1 16 1 8 1 4 1 2 2 3 3 4 5 6 7 8 QPSK 16 QAM 64 QAM 400 2 5 MHz or 1 25 MHz 1 16 1 8 1 3 2 3 QPSK 16 QAM lt 95 dBm lt 89 dBm lt 83dBm Optional Diversity can improve threshold by 2 5 dB VETA
13. f the OSD Demod Lock is OK and packet errors are 0 then Check video is enabled at the transmitter Check correct unit name is selected at the receiver to match the transmitter Check scrambling keys are matched Reduced Image quality Image quality is affected by the selected horizontal resolution The image will become progressively softer for each horizontal resolution below the sharpest resolution of 704 pixels It is advisable to select a horizontal resolution that matches the resolution of the camera Image quality is also affected by the video bit rate which can be read from the video bit rate field of the transmitter controller The standard setting is 2 3Mb s However enabling audio particularly the high quality audio modes will reduce the video bit rate substantially Therefore ensure an appropriate audio mode is selected or audio is fully disabled eEnsure that bit rate of transmitted signal is higher that of the received signal in the Repeater 100 M0103X2 24 of 26 GMS Inc doing business as Cobham Tactical Communications and Surveillance www cobham com tcs Appendix C Example of Default Configurations Settings for LS Band CONFIGURATIONS mne o ro fo ow fo ow om fo fo fo ro ow ow e BDC LO REENEN SES AE om om om sesse se me ome ome RF Frequency 1755 1802 1850 1755 1850 2200 2300 2400 2200 IDEE fs fs fe fe fe fe OFDM Normal Normal Normal Normal Normal Normal Normal Normal No
14. ilter On screen Ee EES Display ANENE om ow ow for ow ow ow O PE EREE ej Descrambling LNB Power Pwr up Video Format O 5 100 M0103X2 26 of 26 GMS Inc doing business as Cobham Tactical Communications and Surveillance www cobham com tcs
15. ing business as Cobham Tactical Communications and Surveillance www cobham com tcs gt If the configuration LED is flashing green press the RF button on the front keypad this action provides power to the internal down converters which must always be on for VMR to receive RF gt Press the MODE button to turn on the diagnostic OSD on screen display gt After approximately 5 seconds the link should be established and video provided by the source should be displayed on the monitor The green RF LED should light as well as the signal strength green LED indicators gt If the red Alarm LED lights it may be an indication that the receiver is unable to lock to a signal Check the following o Ensure the receiver and transmitter configuration green LED 1 through 16 located above the CONFIG button are the same If not press the CONFIG button on either the transmitter or receiver so they match See section 4 1 3 for details on Config LED s o Ensure the BDCC PWR for the VMR is ON Configuration LED should be solid green o Ensure the transmitter RF button has been pressed after applying 12VDC o Use the control cable and GUI to ensure that the following modulation parameters match on both the VETA TX and VMR Bandwidth Frequency Guard Interval and OFDM Polarity o If the TX and RX are physically too close to each other the RX may overload causing distorted Video You may reduce the power of the TX Use RF button or move the T
16. ndix C Example of Default Configurations Settings for LS Band ou sesse see een eek ee ER RR 25 Appendix D Example of Default Configurations Settings for C2 Band sss 20 100 M0103X2 3 of 26 GMS Inc doing business as Cobham Tactical Communications and Surveillance www cobham com tcs Revision History Version Main Changes from Previous Edited Checked version 12 21 2009 Update to sunlight readable monitor jo 100 M0103X2 4 of 26 GMS Inc doing business as Cobham Tactical Communications and Surveillance www cobham com tcs 1 Acronyms This section lists and describes the various acronyms used in this document 16QAM 16 state Quadrature Amplitude Modulation A V Audio Video AES Advanced Encryption System ABS Basic Encryption System 8 bit CSM Compact Surveillance Modem COFDM Coded Orthogonal Frequency Division Multiplexing CVBS Composite Video BDC Block Down Converter FEC Forward Error Correction GUI Graphical User Interface I O Input Output KBaud Kilobaud per second Kbps Kilobits per second Mbps Megabits per second MER Modulation Error Rate MPEG Moving Picture Experts Group NTSC National Television System Committee PAL Phase Alternation Line QPSK Quadrature Phase Shift Keying QAM Quadrature Amplitude Modulation RF Radio Frequency RX Receiver S N Signal to Noise Ratio THD Total Harmonic Distortion TX Tra
17. nsmitter VDC Volts Direct Current VDL VETA Digital Link VR VETA Receiver VT VETA Transmitter VDR VETA Digital Repeater UDP User Datagram Protocol VNA VETA Network Adapter 100 M0103X2 GMS Inc doing business as Cobham Tactical Communications and Surveillance 5 of 26 www cobham com tcs 2 Introduction Cobham Tactical Communications and Surveillance s Very Efficient Transmission Apparatus VETA product line provides several key features that enable high quality and low latency wireless Audio Video A V transmission for the most demanding short or long distance point to point or to multipoint transmission applications VETA uses a robust digital modulation system known as Coded Orthogonal Frequency Division COFDM that provides a robust link that is immune to multipath interference and provides crisp clear pictures in the most difficult of terrains This manual provides information on how to operate the VMR VETA Monitor Receiver as well as pertinent technical information related to the overall system 2 1 Key System Features e 8 Integrated sunlight readable LCD Monitor e Input Frequency 0 174 to 7 2 GHz In Bands e COFDM Demodulation 400 or 2K Carriers e Bandwidths from 125 MHz to 8 MHz e Uses Professional batteries e Internal Block Down Converters e Compact and lightweight e Secure with ABS AES 128 or 256 Encryption e Low End to End System Latency 44mS D 400 carriers is optional with
18. oth on the on the On Screen Display or M S Windows control program Security of transmission is ensured by the use of Standard ABS encryption or for greater security the optional AES 128 or 256 bit scrambling algorithms can be added vi Option Dependant 44mS in DVBT modes Up to 120mS in Narrow Band modes depends on modulation parameters 2 3 Warranty Cobham Tactical Communications and Surveillance offers a 12 month standard product warranty During this period should the customer encounter a fault with the equipment we recommend the following course of action Check the support section of the website for information on that product and any software firmware upgrades If fault persists call our support line and report the fault If fault persists and you are informed to return the product please obtain an RMA number from the Cobham Tactical Communications and Surveillance support department or website and ship the equipment with the RMA number displayed and a description of the fault Please email the support section the airway bill consignment number for tracking purposes Depending on the nature of the fault Cobham Tactical Communications and Surveillance endeavors to repair the equipment and return it to the customer within 14 days of the item arriving at our workshops Obviously it is impossible to cater for all types of faults and to manage 100 replacement part availability and delays are sometimes inevitable 100 M0103X
19. provides DC power in The DC nominal voltage is 12VDC minimum is OVDC and maximum should not exceed 18 VDC Reverse polarity protection is provided but no protection for over voltage Table 5 External Power Connector Name Connector Type Pin Function 4 2 6 RF CONNECTIONS The VMR is always configured with internal down converters which is the normal default hardware setup Only exception is for UHF units where the BDC s are replaced with LNA s Table 6 RF Connections Connector Name Connector Type Comments RF IN B N F To internal down converter 4 3 Using Internal Down Converters Down converters have an LO local oscillator which is mixed with the DVB T transmitter frequency and it then converts it to the IF intermediate freguency The VMR VETA receiver locks on to the IF frequency in order to be able to receive the C OFDM signal The VMR calculates the IF frequency based on the LO in MHz of the down converter as well as the DVB T transmitter frequency in MHz and whether the LO is using high or low side injection These parameters must be entered into the Cobham Tactical Communications and Surveillance control software setup screens see Figure 7 However when the unit leaves the factory these parameters are pre configured for the internal down converters Although the BDC gain setting is not needed for the operation of the system it is used in calculating of input levels displayed by OSD on screen display
20. rl Figure 3 VMR Monitor Controls Figure 3 shows the functions of Monitor Control To activate Brightness Ctrl first select Menu Now pressing of Brightness Ctrl will decrease the brightness of the monitor by 20 VMR also has an automatic brightness control feature for energy saving purposes 100 M0103X2 12 of 26 GMS Inc doing business as Cobham Tactical Communications and Surveillance www cobham com tcs 4 1 1 Received Signal Strength Green LED s The green LED s located above the MODE button when ON indicate the signal strength the RF input power level from the minimum No LEDs Light to the maximum strength All four LEDs Light 4 1 2 RF Green LED The RF green LED indicator located above RF button when ON indicates that the VMR is locked to the incoming signal system is operating normally 4 1 1 Lock Yellow LED The LOCK key icon yellow LED indicator located above the RF button when is ON indicates that incoming signal is encrypted F Sy enn RF 105 U 0206 13 G S s 8304 ALARM O40 8 MODE RF CONFIG Figure 4 VMR control panel 4 1 2 Alarm Red LED The Alarm red LED indicator located above the RF button indicates a fault condition or an alarm when ON This can be an indication that there is no lock of the Transport Stream no video in the Transport Stream or mismatching Encryption Key 4 1 3 Green Config LEDS 1 to 8 VMR has an option that can only be set in factory to ha
21. rmal Polarity sere of wae one ne i i ie ae oe blus Dad n Yes Yes Yes Yes Yes Yes Yes Yes Yes no Video MPEG4 deblocking No No No No No No No No No Filter 9 DOBROTE Z AEE EE Z w AEE High High High High High RG H 6Mhz 2 5Mhz 2 5Mhz 2 5Mhz 2400 1802 2300 1802 1 32 1 16 1 16 1 16 Normal Invert Invert Invert NTSC NTSC NTSC NTSC lt 8 Yes Yes lt 2 Z O NUL E Oo CD Nn O On screen Display Auto Spect OFF OFF O O Z HH O Detect pm for or for fr AE ne fox om for om a fx fo fo NET UP sos sos sos sos 525 sos sos 525 525 sos 525 525 sos 525 525 525 Video Format 100 M0103X2 25 of 26 GMS Inc doing business as Cobham Tactical Communications and Surveillance www cobham com tcs Appendix D Example of Default Configurations Settings for C2 Band CONFIGURATIONS ete fe fe RF Frequency 4400 4400 4700 5000 4400 4700 EIE IIT OFDM Normal Normal Normal Normal Normal Polarity seff dB 4700 5000 4400 4700 5000 4400 DVB T NB High High High High High High dB lip HE Normal Normal Normal Normal NTSC Format NTSC Blue Screen on Yes no Video MPEG4 deblocking No No No No No No Yes F
22. s ed power Push R to turn Ensure that RF source is active and has correct freguency Red Alarm Lit No RF Signal Lock Ensure that BDC s are On RF LED Off Ensure there is no interfering signal Ensure that Video is enabled at RF LED On decoder Lock Ensure that scrambling keys matched Signal strength LED s off No incoming RF signal Ensure that RF source is active 100 M0103X2 23 of 26 GMS Inc doing business as Cobham Tactical Communications and Surveillance www cobham com tcs Appendix B Faults Fault Action No RF Link e Check if the following parameters of the Transmitter and corresponding Receiver match Freguency Bandwidth Guard Interval Spectral Inversion e Check if the down converters operate correctly Correct LO is set BDC power is On e Check if the TX Output Power is On Poor Link Performance e Interference Should an interfering RF signal occur on the same freguency the performance of the link will be affected Remove the interferer or move to an alternative frequency e Reduced transmit power ensure that the attenuation setting on the transmitter is appropriate for direct output or for amplifiers connected e No Diversity operation Ensure both down converters are operational Blue screen at receiver Switch on the OSD if Demod Lock is not ok then see No RF Link section above If Demod Lock is OK but Packet errors are not 0 then see section Poor Link Performance above I
23. the 1 25 or 2 5MHz RF bandwidths 9 AES 128 or AES 256 are optional 2 2 General System Information Cobham Tactical Communications and Surveillance s VETA Monitor Receiver VMR is a State of the art COFDM receiver for mobile portable applications This compact battery IDX or Anton Bauer or DC operated receiver contains two internal Down Converters or LNA for UHF applications for Diversity reception a VETA compliant Receiver 8 inch flat screen sunlight readable monitor with headphone Analog A V output jacks are provided for viewing on an external monitor Cobham Tactical Communications and Surveillance s Very Efficient Transmission Apparatus VETA Product Line provides several key features that enable high quality and low latency wireless Audio Video A V transmission for the most demanding short or long distance point to point or point to multipoint transmission applications VETA uses a robust digital modulation system known as Coded Orthogonal Frequency Division Multiplexed COFDM that provides a robust link that is immune to multipath interference and provides crisp clear pictures in the most difficult of terrains 100 M0103X2 6 of 26 GMS Inc doing business as Cobham Tactical Communications and Surveillance www cobham com tcs The VETA product line supports standard DVB T 2K carriers with 6 7 or 8 MHz bandwidths Additionally optional 1 25 MHz or 2 5 MHz RF bandwidths with 400 carriers that allow both increased reception
24. ve 8 or 16 configurations In 8 configuration mode 8 green LEDs located above the CONFIG button indicate which one of the stored configurations is currently selected Configuration number is represented in a binary form using LED s 1 4 For VMR with 16 configurations combination of Config LED s determines which configuration number is selected In this case LED 5 is always On and 6 7 and 8 always are Off The following table shows the correlation between Configuration numbers selected and Config LED s 100 M0103X2 GMS Inc doing business as Cobham Tactical Communications and Surveillance 13 of 26 www cobham com tcs Table 1 Config LED s Config 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Number ENE IE IR AR IN DEI IS ad fenjonf onjonf E NEK LED4 EEE AE EE 4 1 4 Config Button The Config button when pressed selects the next configuration from memory The 16 configurations in memory define all potential variables including center frequency modulation bandwidth Guard Interval and OFDM polarity 7 Note that this configuration selection 1 through 16 must match the transmitter s OFDM modulation parameters selection for the link to work 4 1 5 RF Button Pressing the RF button toggles ON OFF DC power to the Block Down Converters Flashing Config LED indicates OFF state and solid green ON state The VMR must always have power on to BDC for unit to lock to incoming RF Input GHz 2
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