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Selecting Test Features
Setting up Signaling Bits
SONET Operation
1 On the HP 37717C press and select an SONET interface.
2 On the MAIN SETTINGS page set MAPPING to ASYNC 2 Mb/s or FL
BYTE 2 Mb/s and set the VT PAYLOAD to PCM30 or PCM30CRC
(structured or unstructured).
3 Set the CAS ABCD bits as required. If you select an unstructured
payload the signaling bits are set up on the MAIN SETTINGS page; if
structured is selected they are set up on the STRUCT’D PAYLOAD
page.
4 Press and setup the HP 37717C receiver interface to match
the signal being output from the HP 37717C transmitter.
HOW TO Transmit a DS1 signal with user-defined signaling bits
(Option 110 instruments)
PDH Operation
When transmitting a DS1 framed, structured signal or a DS3 signal
structured down to DS1, the values of A,B signaling bits for D4 and SLC-
96 payloads, and the A,B,C,D signaling bits for ESF payloads can be set.
1 On the HP 37717C press and select a PDH interface.
2 On the MAIN SETTINGS page select a DS1 SIGNAL and set the
PAYLOAD TYPE to D4, ESF or SLC-96 and STRUCTURED.
3 On the STRUCT’D SETTINGS page set the TEST SIGNAL to 56 kb/s
or Nx56 kb/s
4 Set the A,B bits (for D4 and SLC-96) and A,B,C,D bits (for ESF) as
required. Press and set up the HP 37717C receiver
interface to match the signal being output from the HP 37717C
transmitter.
SONET Operation
1 On the HP 37717C press and select an SONET interface.
2 On the MAIN SETTINGS page set MAPPING to ASYNC DS1 and set
the VT PAYLOAD to D4, ESF or SLC-96 and STRUCTURED.
TRANSMIT
RECEIVE
TRANSMIT
RECEIVE
TRANSMIT
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