TTC T-BERD 107A, Reference Manual

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6-17
PRINTER
OPERATION
SECTION 6
Possible messages are:
Alarm Messages
SIG LOSS XX — Loss of valid T1 pulses, where
XX is a running count of signal losses since the
last test restart.
FRAM LOSS XX — Loss of frame synchroniza-
tion, where XX is a running count of frame sync
losses since the last test restart.
PATT LOSS XX — Loss of pattern synchroni-
zation, where XX is a running count of pattern
sync losses since the last test restart.
YELLOW ALM ON — A yellow alarm condi-
tion is present.
YELLOW ALM OFF — A yellow alarm condi-
tion is no longer present.
EX ZERO ON — More than 15 consecutive
zeros have been received when the B8ZS switch
is set to AMI (LED extinguished) or more than
seven consecutive zeros have been detected
when the
B8ZS switch is set to B8ZS (LED
illuminated).
EX ZERO OFF — Less than 16 consecutive
zeros have been received when an excess zeros
condition had been previously detected.
ONES DENSITY — The received data contains
less than n ones in 8(n+1) bits, where n = 1 to 23.