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DataScout™ 10G Users Manual
ing errors and alarms. The test set receive recovers the DS3 signal and passes it to
the transmit circuitry; framing and signal format is regenerated.
DS3 Thru Mode No GEN – Select this mode for intrusive through-mode testing with
framing and signal format passing directly through to the transmit circuitry without regenerating framing errors, BPV, alarms, etc. Any error detected on the RCV pair will
be passed through to the XMT pair. The test set still captures and display all received
errors.
Clocking
The test set default clocking is NW-Network (recovered) clock. In TERM mode only IntInternal clock may be selected by pressing NW Network button and select Int-Internal
clock. The test set will now be the master clock.
Framing Selection
The test set default framing is ‘C-Bit’. To change the framing press C-Bit and select
M13, Unframed or Auto. In Auto framing, the occurrence of an LOS greater than two
(2) seconds will trigger an Auto-frame upon next valid signal (pulse) detection.
DS3 Receive Framing
FRAMED! – The DataScout 10G displays a RED “OOF” to the right of the TX frame
mode (above).
DS3 Line Code
B3ZS coding is ALWAYS selected for DS3 - users cannot change this setting.
Loopback
Loopbacks are only used in TERM modes (intrusive testing). Tap the Loopback DS3
NIU pull down menu to select a loopback. Note that Monitor mode removes the Loopback menu.
Local Loopbacks
Self-Loopback – loops the test set transmit port internally to the receive port; this setting should only be used for training or confirming the test set circuitry.
Line-Loop – loops the receive signal to the transmit port (toward the network)
Stuff-Bit M23 – Optional loopback for looping M13 Mux’s
FEAC Loopback – To loopback a DS3 NIU or MUX select the element to loop i.e. NIU
and tap Loop-Up. The test set will check for pre-existing loop then send the selected
loopback code, verify loopback and display “ACTIVE” in place of “Loop-UP”. A 2^23-1
BERT pattern is automatically started upon loop-up.
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