Table of Contents
Summary of Contents for GMS VETA
- Page 1 Technical Operations Manual The most important thing we build is trust. VETA Receiver Cobham Surveillance GMS Products 1916 Palomar Oaks Way Ste 100 Carlsbad, CA 92008 100-M0133X1 05/27/09 T: 760-496-0055 F: 760-496-0057 www.cobham.com/gms...
- Page 2 Revision History Version Date Main Changes from Previous version Edited by X1 9‐26‐2009 Initial Release NM 2 of 33 100-M0133X1 www.cobham.com/gms...
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Page 3: Table Of Contents
6.1 System Requirements .................................. 22 6.2 Software Installation ................................... 22 6.3 VR Configurator Functions ............................... 22 7. VETA CHAINING FEATURE ..............................24 7.1 VETA Digital Repeater (VDR) ..............................24 7.2 Compact Surveillance Modem (CSM) ..........................24 7.3 UDP Transmitter .................................... 24 ... - Page 4 APPENDIX B – TROUBLESHOOTING SECTION ............................29 APPENDIX C – CONTROL CABLE ................................... 30 APPENDIX D – VR DEFAULTS, LS BAND ..............................31 APPENDIX E – VR DEFAULTS, S1 BAND..............................32 APPENDIX F – VR DEFAULTS, C2 BAND ..............................33 4 of 33 100-M0133X1 www.cobham.com/gms...
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Page 5: Acronyms
Moving Picture Experts Group NTSC National Television System Committee PAL Phase Alternation Line QAM Quadrature Amplitude Modulation QPSK Quadrature Phase Shift Keying RF Radio Frequency RX Receiver S/N Signal‐to‐Noise Ratio THD Total Harmonic Distortion TX Transmitter UDP User Datagram Protocol VDC Volts (Direct Current) VDL VETA Digital Link VDR VETA Digital Repeater VMT VETA Miniature Transmitter VNA VETA Network Adapter VR VETA Receiver VT VETA Transmitter 5 of 33 100-M0133X1 www.cobham.com/gms... -
Page 6: Introduction
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. -
Page 7: General System Information
General System Information The VR (VETA Receiver) receives and demodulates DVB-T 2k carriers’ signals with bandwidths of 6, 7 or 8 MHz. Additionally, optional 1.25 or 2.5 MHz RF bandwidths with 400 carriers allow both increased reception range and larger quantity of simultaneous A/V links to operate in the same frequency band. -
Page 8: Warranty
Depending on the nature of the fault GMS endeavor 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. -
Page 9: Getting Started
Getting Started The VR is pre-configured by GMS prior to shipment (based on customer requirements), thus is ready to work “right out of the box”. NOTE: Additional cables and antennas may be delivered by GMS based on customer application. Contact GMS for further information. -
Page 10: Key Rf Settings For Cofdm Transmission
Install omni-directional antennas (or ones best suited for the application) onto the RF IN A and RF IN B ports on the Veta Receiver and one on the SMA RF connector on the VMT. (Hard lined connection can be made instead, make sure enough attenuation is present when performing a hard line checkout) ... -
Page 11: Figure 2 - Vr Rf Essentials
For further details on the connectors, monitoring and controlling the VR read thoroughly through this manual starting with section 5, hardware overview, and section 6. For a full explanation of the control software see Manual: 100-M0131. 11 of 33 100-M0133X1 www.cobham.com/gms... -
Page 12: Hardware Overview
The Power Switch located on the far right side of the panel enables +VDC to the system; up position is ON, down position is OFF. On powering the VR, the eight green configuration LED-s (see section 5.1.6) will light up indicating the current configuration (the one that was active 12 of 33 100-M0133X1 www.cobham.com/gms... -
Page 13: Received Signal Strength Green Led-S
LEDs on the front panel increment in a binary fashion. The 16 configurations in memory define all potential variables including center frequency, modulation bandwidth, Guard Interval and OFDM polarity. See section 6 and software manual 100-M0131 for a full discussion on setting the parameters for each configuration. 13 of 33 100-M0133X1 www.cobham.com/gms... -
Page 14: Rf Button
RF signal, as shown in Figure 5. The OSD is explained in detail in Manual 100-M0131. Figure 5 – VR OSD 14 of 33 100-M0133X1 www.cobham.com/gms... -
Page 15: Vr Rear Panel
+12VDC through the IF port before activating power (or for that matter ensure the power is off before connecting) otherwise damage could occur to the down converters. The +12V power can be activated using GMS control software or the RF button on the front panel. 15 of 33 100-M0133X1... -
Page 16: Asi Out
50 ohm. Audio is single ended. There are no audio gain adjustments. – Audio Connections Table 4 Connector Connector Function Name Type Lemo 5-PIN (F) Lemo 5-PIN (F) Lemo 5-PIN (F) Lemo 5-PIN (F) LEFT AUDIO Lemo 5-PIN (F) RIGHT AUDIO 16 of 33 100-M0133X1 www.cobham.com/gms... -
Page 17: J1 Multifunction Db-15 (F) Connector
3 &4. The receiver can be controlled remotely with GMS PC control software (which is explained in more detail in Manual 100-M0131). This is done by connecting the PC RS232 transmit and receive lines to the RS232 TX CTRL and RS232 RX CTRL, pins 5 and 6. -
Page 18: Rj-45, Video Server (Optional Video Server)
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 frequency. The VR (VETA receiver) locks on to the IF frequency in order to be able to receive the C-OFDM signal. The VR calculates 18 of 33... - Page 19 (in MHz) and whether the LO is using high or low side injection (relative to the band of transmission). These parameters must be entered into the GMS control software setup screens (see Figure 7 and also refer to manual 100-M0131) regardless if the VR is configured with internal or external down converters.
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Page 20: Figure 7 - Bdc Settings Window
One possible work-around to excessive signal loss (when running long IF cable lengths) is to use a good quality in-line amplifier. Make sure to follow manufacturer’s instructions very closely because improper installation of an inline-amplifier could introduce other problems. 20 of 33 100-M0133X1 www.cobham.com/gms... -
Page 21: Figure 8 - External Bdc Setup
Figure 8 – External BDC Setup 21 of 33 100-M0133X1 www.cobham.com/gms... -
Page 22: Software Control Overview
Software Control Overview Configuration, control and monitoring of the VR units are enabled through the use of GMS’ optional (sold separately) MS Windows-based VR Configurator software program. This Graphical User Interface (GUI) program provides the end user with a straightforward way to interface with the VR unit. During normal operation, once a VDL link is established, the VR Configurator GUI can be used to monitor the link statistics as well as control the receiver. -
Page 23: Figure 9 - Vr Configurator Com Port Selector
Configurator program contains function buttons and all the configurable settings available on a VETA Rx. For more detail see the Software Manual: 100-M0131. Figure 9 – VR Configurator COM Port Selector Figure 10 – VR Configurator Main Screen 23 of 33 100-M0133X1... -
Page 24: Veta Chaining Feature
A UDP transmitter can easily be employed using the Chaining Out of a VNA into the Chaining In of a VETA TX. UDP can be sent to the VNA via the RJ45 connector which is converted to Chaining within the VNA and delivered to the VETA TX through the Chaining interface. On the receiver Side, a VR will send its Chaining Out to the Chaining In of a VNA. -
Page 25: Specifications
DVB-T FEC 1/2, 2/3, 3/4, 5/6, 7/8 DVB-T Modulation QPSK, 16-QAM, 64-QAM Optional VETA Narrow BW Modes VETA # of Carriers: 400 VETA Bandwidth: 2.5 MHz or 1.25 MHz VETA Guard 1/16, 1/8 VETA FEC 1/3, 2/3 VETA Modulation QPSK, 16QAM Threshold: (6,7, &... -
Page 26: Audio Decoding
Chroma Format: 4:2:0 or 4:2:2 Line Standard: 525 and 625 (NTSC/PAL) Horizontal Resolution: 704, 528, 480, 352 pixels Veta Systems Latency end to end delay: Down to ~44ms for 6,7, or 8 MHz, Narrow BW to ~120mS (w/VETA TX Only, mode dependant) Video Outputs... -
Page 27: Environmental
8.8 Environmental Operational Temperature: -10 to +70 deg C 8.9 Optional LAN/USB Interface Refer to GMS’ VETA IP Network Adapter (VNA) Data Sheet. This optional module provides 10/100 Base-T LAN (RJ-45) Interface that can be used for audio/video/user-data streaming 8.10 RS232 DATA OUTPUT Baud Rate: Up to 115 k baud. -
Page 28: Appendix A - Led Indictors
Ensure that Video is enabled Red Alarm Lit Has RF Signal Lock, but at the Transmitter. no decoder Lock Ensure that scrambling keys RF LED On matched No incoming RF signal Ensure that RF source is Signal strength active. LED-s off 28 of 33 100-M0133X1 www.cobham.com/gms... -
Page 29: Appendix B - Troubleshooting Section
Video Bit Rate. disabled if not required. Either on the Tx or Rx (which ever is more accessible) switch Reading: 0.0 the OFDM polarity but, other OFDM Polarity Mismatch parameters locked 29 of 33 100-M0133X1 www.cobham.com/gms... -
Page 30: Appendix C - Control Cable
Appendix C – Control Cable 30 of 33 100-M0133X1 www.cobham.com/gms... -
Page 31: Appendix D - Vr Defaults, Ls Band
Appendix D – VR DEFAULTS, LS BAND The most important thing we build is trust. 31 of 33 100-M0133X1 www.cobham.com/gms... -
Page 32: Appendix E - Vr Defaults, S1 Band
Appendix E – VR DEFAULTS, S1 BAND 32 of 33 100-M0133X1 www.cobham.com/gms... -
Page 33: Appendix F - Vr Defaults, C2 Band
Appendix F – VR DEFAULTS, C2 BAND 33 of 33 100-M0133X1 www.cobham.com/gms...
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