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Table of Contents
Summary of Contents for Broadcast B044
- Page 1 B044 DUAL G703 DETECTOR Handbook Version 1.0...
- Page 2 DUAL G703 Detector B044 dB Broadcast Ltd has made every effort to ensure the accuracy of information contained within this document which is nevertheless supplied for information purposes only and does not constitute any form of warranty or guarantee. All trademarks acknowledged.
- Page 3 DUAL G703 Detector B044 Date of first publication 12/06/2004 Current issue and date Board issue numbers 259-044-011 covered 2004 dB Broadcast Ltd...
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Page 4: Table Of Contents
Channel A link functions and adjustments Channel B link functions and adjustments Mode selection – affects both channels Selecting the relay drive signal Selecting the micro-controller mode AMPLE PROBLEMS AND THEIR SOLUTIONS ORDERING INFORMATION SPECIFICATION 2004 dB Broadcast Ltd... -
Page 5: Introduction
B044 Introduction The B044 is part of the Hawkeye range of detector modules for monitoring G703 signals at 2.048MHz rate. It fits in either 1U or 3U Avitel or Vistek frames and power is derived from the frame PSU. An on-module regulator provides +/- 5 Volt rails. -
Page 6: Main Features
Alarm will turn on when three consecutive incorrect frame alignment signals have been received • CRC4 errors are counted internally and update a 10 bit counter every second, with the alarm being set if the count exceeds a pre- determined level 2004 dB Broadcast Ltd Version 1.0... -
Page 7: Installation
The available rear connectors and the frames/signal I/O used are as follows: Type Frame Connectors Signal types VMC 3306K 1U/3U Avitel BNCs G703 at 2.048MHz VB110 1U(F010)/3U BNCs G703 at 2.048MHz Vistek Avitel style chassis 3U Vistek style VMC 3306K chassis VB110 2004 dB Broadcast Ltd Version 1.0... -
Page 8: Rear Panel Connections
Level Low B (open collector) Relay A2 NC Frame Error B (open collector) Relay A2 NO Not connected Ctrl 0V Note: NO = normally open, NC = normally closed and Com = common 2004 dB Broadcast Ltd Version 1.0... -
Page 9: Configuration And Operation
Alarm insertion signal present (AIS & TS16 AIS) Level Level low Signal below threshold set by RV1 (CHA) or RV2 (CH B) CRC4 high Quality below CRC-4 threshold (if enabled) Note: Relay outputs are programmable – see Configuration. 2004 dB Broadcast Ltd Version 1.0... -
Page 10: Configuration
B044 Configuration and operation Configuration Each channel has a number of configuration jumper links and adjustments. The B044 Dual G703 Detector showing jumper links Channel A link functions and adjustments Adjustment Main Module - Channel A jumpers Select detected error to drive relay outputs FRM, LEV, AIS or CRC – see... -
Page 11: Selecting The Relay Drive Signal
The micro-controller may be operated in one of three modes: Mode JP3 position Description Near front panel Not used CRC4 CRC4_1 CRC-4 threshold alarm enabled (default) CRC4 CRC4_2 CRC-4 threshold alarm disabled MF-Dis MF-Dis Multi-frame disabled 2004 dB Broadcast Ltd Version 1.0... -
Page 12: Sample Problems And Their Solutions
(RV1 for CHA and RV2 for CHB). Check that the incoming signal is not double terminated. The FRAME or CRC LEDs never operate, even with known bad signals Check that the micro-controller is being operated in the correct mode. 2004 dB Broadcast Ltd Version 1.0... -
Page 13: Ordering Information
3U Chassis, 14 Module slots, 2 48V PSU slots (2 48V PSUs included) VB110 BNC Rear connector module 1U Vistek configuration (dual PSU) F010 1U Chassis, 2 Module slots, 2 PSUs ( PSUs included) VB110 BNC rear connector module 2004 dB Broadcast Ltd Version 1.0... -
Page 14: Specification
G703 75 Ohm or 120 Ohm – factory fitted option – with active loop though outputs Framing: CRC4, Multi-frame or Non-CRC4 Data rate: 2.048Mbps +/-50ppm Connectors 2 x 3 BNCs (two used per channel) 2004 dB Broadcast Ltd Version 1.0...