Selecting Atm Cell Stream Payload - HP 37717C User Manual

Selecting Test Features

Selecting ATM Cell Stream Payload

Selecting ATM Cell Stream Payload
Description The test stream comprises: 1 Foreground (F/G) Channel, 3 Background
(B/G) Channels and the remaining cell opportunities which are filled
with unassigned or idle cells.
HOW TO: 1 Select the payload which will be the subject of the test, the foreground
payload, in F/G PAYLOAD
For Delay measurements and Cell Misinsertion and Loss measurements
you need to select
The
cross cell PRBS, cell misinsertion or cell loss will cause pattern sync loss.
With
will NOT cause pattern sync loss but, of course, payload errors will be
counted.
The
foreground.
2 Select a background stream B/G STREAM 1,2 or 3
3 Select the byte to be used as a payload in the selected background
(B/G PAYLOAD).
4 Repeat the procedure for the other B/G STREAMS.
5 Select the remaining content of the cell stream FILL CELLS
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TEST CELL
PRBS runs continuously from cell to cell. With the
CROSS CELL
PRBS, the PRBS is restarted in every cell. Cell loss
SINGLE CELL
selection allows you to select your own fixed byte in the
USER BYTE
UNASSIGNED
.
.
or
IDLE