Wavetek ANT-20, ANT-20E Operating Manual

BN 3035/98. 24

ANT-20, ANT-2 0 E
Advanced Network Tester

M13 MUX/DEMUX

BN 3035/90.32

Drop & Insert

BN 3035/90.20
in combination with
M13 MUX/DEMUX

Software Version 7.20
Operating Manual

5

Please direct all enquiries to your
local Wavetek Wandel Goltermann sales
company. The addresses are given at the
end of this handbook.

Copyrights

This product or parts of it are based upon
Recommendations and/or Standards of the
Standardization Sector of the International
Telecommunication Union - ITU-T and/or of the
European Telecommunications Standards Institute ­ETSI. These Recommendations and Standards are
subject to copyrights of these organizations. Without
written permission of the ITU-T and/or ETSI it is not
permitted to copy ITU-T Recommendations or ETSI
standards or parts thereof and/or make them available
to third parties.

Wavetek Wandel Goltermann
Eningen GmbH & Co.

Mühleweg 5, 72800 Eningen u. A.
© 2000

Author: MDD/TD
Translator: John Nutley

Order no.: BN 3035/98.24
Edition: 07/00.07 (V 7.20)

Previous edition:
06/00.04 (V 7.1)

Subject to change without notice
Our normal guarantee and delivery
terms apply

Printed in Germany

ANT-20/ANT-20E M13 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, M13 MUX/DEMUX

(option BN 3035/90.32). . . . . . . . . . . . . . . . . . . . . . . . . . . . .S-1

1.2 CRC checksum (DS1 ESF). . . . . . . . . . . . . . . . . . . . . . . . . .S-1

1.3 Justification as per T1.107 or T1.107a . . . . . . . . . . . . . . . . .S-2

1.3.1 PDH tributary offset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .S-2

1.4 Error insertion (anomalies) . . . . . . . . . . . . . . . . . . . . . . . . . .S-2

1.5 Alarm generation (defects) . . . . . . . . . . . . . . . . . . . . . . . . . .S-2

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 Error measurements (anomalies) . . . . . . . . . . . . . . . . . . . . .S-4

2.3 Alarm detection (defects) . . . . . . . . . . . . . . . . . . . . . . . . . . .S-4

2.4 Offset measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .S-4

2.5 Evaluation of test signals for bit error measurements. . . . . .S-5

2.5.1 Internal evaluation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .S-5

2.5.2 External signal (with option BN 3035/90.20 only) . . . . . . . . .S-5

M13 MUX/DEMUX ANT-20/ANT-20E

ii

3 Drop&Insert / Through Mode / Block&Replace . . . . . . . . . . . . . . . S-6

3.1 Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-6

3.1.1 Clock generator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-7

3.1.2 Anomaly insertion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-7

3.1.3 Defect generation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-7

3.1.4 Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-8

3.2 Signal outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-8

3.2.1 AUXILIARY signal output [11], electrical. . . . . . . . . . . . . . . . S-8

3.2.2 LINE/AUXILIARY signal output [13], electrical . . . . . . . . . . . S-8

3.3 Signal inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S-9

3.3.1 AUXILIARY signal input [10], electrical. . . . . . . . . . . . . . . . . S-9

3.3.2 LINE/AUXILIARY signal input [12], electrical . . . . . . . . . . . S-10

Introduction I-1

ANT-20/ANT-20E M13 MUX/DEMUX

Introduction

Option BN 3035/90.32

1 Multiplex and demultiplex functions

When equipped with Option BN 3035/90.32, “M13 MUX/DEMUX”, the ANT-20 can generate
and analyze DS3 signals containing 28 DS1 signals. These DS3 signals can also be mapped
into OC-N signals or STM-N and STS-N signals. This allows tests on add/drop multiplexers
equipped with built-in M13 multiplexs or on M13 signals. It is also possible to insert an external
DS1 signal via a connector ot to drop an internal DS1 signal and output it via a connector (Drop
& Insert Option, BN 3035/10.20).

The appropriate signal structures are set in the “Signal Structure” window using the “Signal
Structure Editor”.

Fig. I-1 Testing an add/drop multiplexer (ADM) equipped with M13 multiplexer