TM 11-7025-234-23
Table 1-2.
Control Board (A4) Plug Jumpers -- Continued
Normal
Config-
Description
Name
Jumper
uration
With jumper in, round robin training is disabled.
Round Robin
L
OUT
Disable
With jumper in, the b' ind interval used to
M
OUT
Long Blind
inhibit endless loops in the round robin training
discipline is doubled
This jumper)er would be used
in long path delay channels as satellite.
With jumper in, UI timeout is 1.7 sec. With
Short UI
OUT
Q
jumper out, UI timeout is 6.8 sec at the 2400
Timeout
baud rate.
R
With jumper in, CG turns off at an error rate of
High
OUT
approximately 1X10-3. With jumper out,
Threshold CG
threshold is approximately 1X10-4.
s
OUT
With jumper in, all signal quality thresholds
High Error
including UI, CG, and quality indictors are
Jumper
increased about an order of magnitude in error
rate over normal.
High Error
With jumper in, equalizer taps and receive
T
OUT
timing recovery updates are frozen and thus not
Freeze
allowed to update under high error rate
conditions.
u
With jumper out, CB drops during training and
OUT
CB Low During
follows CA. With jumpers in, CB follows CA
Train
dependent on CA/CB delay, but does not drop
during training or test mode.
v
Spare
1-17
