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Wavetek Wandel Goltermann ANT-20 - Table of Contents

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ANT-20/ANT-20E PDH MUX/DEMUX
i
Contents
Introduction
1 Multiplex and demultiplex functions . . . . . . . . . . . . . . . . . . . . . . . . .I-1
2 Testing switch and sensor functions . . . . . . . . . . . . . . . . . . . . . . . . .I-2
3 In-service monitoring of tributary channels . . . . . . . . . . . . . . . . . . .I-2
Specifications
1 Generator section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-1
1.1 Frame generator, 64k/140M PDH MUX/DEMUX Chain
(option BN 3035/90.30). . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-1
1.2 Frame alignment signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-1
1.2.1 Frame bit modifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-1
1.2.2 CRC checksum (PCM 30 CRC / PCM 31 CRC) . . . . . . . . . . S-2
1.3 Justification as per ITU-T G.742 and G.751 . . . . . . . . . . . . . S-2
1.3.1 PDH tributary offset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-2
1.4 Error insertion (anomalies) . . . . . . . . . . . . . . . . . . . . . . . . . . S-3
1.5 Alarm generation (defects) . . . . . . . . . . . . . . . . . . . . . . . . . . S-3
1.6 Test signals for bit error rate measurements. . . . . . . . . . . . . S-3
1.6.1 Internal test signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-3
1.6.2 External signal (with option 3035/90.20 only) . . . . . . . . . . . . S-3
1.6.3 Filler signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-3
2 Receiver section. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-4
2.1 Frame systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-4
2.2 Evaluation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-4
2.2.1 Frame bit evaluation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-4
2.2.2 CRC evaluations (PCM 30 CRC / PCM 31 CRC) . . . . . . . . . S-4
2.3 Offset measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-5
2.4 Error measurements (anomalies) . . . . . . . . . . . . . . . . . . . . . S-5
2.5 Alarm detection (defects) . . . . . . . . . . . . . . . . . . . . . . . . . . . S-5
2.6 Evaluation of test signals for bit error measurements . . . . . . S-5
2.6.1 Internal evaluation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-5
2.6.2 External signal (with option 3035/90.20 only) . . . . . . . . . . . . S-5