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The Event Log, shown in Figure 19, loads and time-
stamps IDSL circuit performance anomalies and
threshold violations. This screen is a very useful aid
in troubleshooting a chronic circuit. It monitors DDS
sync loss, DDS open loop, IDSL OCU-R margin,
IDSL sync loss, and power-up events. IDSL loop
signal-to-noise margin is calculated on a numerical
scale from 0-20 with 0 approximately equal to a BER
of 1 x 10
-6
and 20 equal to virtually a 0 BER.
CIRCUIT ID:IDSL Test Unit
EVENT
DDS SYNC LOSS
DDS LOOP OPEN
OCU-R MARGIN
DSL SYNC LOSS
OCU-R POWER
LAST LOG RESET
CIRCUIT ID:IDSL Test Unit
14
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EVENT LOG
FIRST
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07/24/00 11:10:04
-------- --------
07/24/00 11:10:04
07/24/00 11:10:01
01/03/98 03:33:20
<ENTER>
To CLEAR the Event Log
<ESC>
To exit without destroying data
Figure 19. Event Log Screen
Set Circuit ID
New ID =
Figure 20. Set Circuit ID Screen
61220010L2-5, Issue 3
The Set Circuit ID screen, Figure 20, sets the circuit
identification.
07/25/00 02:38:13
LAST
CURRENT
07/24/00 20:45:03
CLEAR
07/24/00 20:45:03
CLEAR
-------- --------
CLEAR
07/24/00 20:45:03
CLEAR
07/25/00 02:00:00
CLEAR
07/25/00 02:38:36
COUNT
255
020
---
021
017
61220010L2-5C
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