TRANSMIT SONET

Making Measurements

Performing a SONET Tributary Scan

Performing a SONET Tributary Scan

Description Tributary Scan tests each tributary for error free operation and no occurrence of Pattern Loss. A failure is indicated by highlighting the tributary in which the failure occurred. The MAIN SETTINGS , mapping setup determines the tributary structure.

The HP 37718A will configure the Transmitter to the Receiver and the PATTERN is forced to the payload it will fill.

TIP:The SONET Tributary Scan display can be logged to the chosen logging device. See "Logging on Demand " page 110.

HOW TO:

1

Set up the transmit and receive SONET interfaces and payload as

 

 

required. See "Setting SONET Transmit Interface " page 4 and

 

 

"Setting SONET Receive Interface " page 17.

 

2

Choose the required BIT ERROR THRESHOLD.

 

 

This determines the error rate above which a failure is declared.

 

3

Choose the required TEST TIMING.

 

 

The value you choose is the test time for each individual tributary and

 

 

not the total test time.

 

 

For example, 28 VT-1.5 tributaries in an STS-1 SPE - the time taken

 

 

to complete the Tributary Scan will be 28 X TEST TIMING choice.

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