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MTT-14B e_Manual D07-00-083P RevA00
2.3.2 Alarm Status
This screen provides
general alarm status
(current and history for
local and remote). The
following is reported:
Figure 31 STUx E1 Alarm Status Screen
SNR: Triggered when the local current SNR margin value is below
the user threshold setting. This is set in MODEM CONTROL >
SYSTEM SETTINGS, on the SNR MARGIN THRESHOLD line.
LOSW: Loss of Sync defect alarm, a loss of synchronization word
defect is declared when at least 3 consecutive received frames
contain 1 or more errors. An LOSW defect is cleared when at
least 2 consecutive received frames contain no errors.
ATTN: Triggered when the local attenuation value is greater than
the user threshold value. This is set in MODEM CONTROL >
SYSTEM SETTINGS, on the LOOP ATTN THRESHOLD line.
These alarm conditions are displayed as current and history.
These are defined as:
curr YES: The alarm condition is currently detected.
curr NO: The alarm condition is not currently detected.
hist YES: The alarm condition has been detected, but it is no
longer present.
hist NO: The alarm condition has never been detected since the
start of the test or since pressing HISTORY.
The following F-keys are available:
PRINT (F3): Send the alarm screen to the serial port.
STORE (F4): Press to store the status screen.
08:39:57
>LINK UP
STU-C E1<
ALARM STATUS
LOCAL
REMOTE
curr
hist
curr
SNR :
NO
NO
NO
LOWS:
NO
NO
NO
ATTN:
NO
NO
NO
PRINT
hist
NO
NO
NO
STORE
Page 53 of 101
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