36
MDS 4790M (MPT 1411) I/O Guide
MDS 05-3628A01, Rev. B
LOG [CLR]
This command displays or clears a list of the last 800 operating changes, called
“system events.” These events include alarm notifications,
as well as normal
operator actions such as turning the power on or off.
In many cases, the events
leading up to a failure can be reviewed to help determine the cause of a
problem.
Entering the
LOG
command without any parameters displays the entire event
history. Entering
LOG CLR
or
LOG CLEAR
clears all current events from the log
history.
MODEL
This command displays the radio’s model number. Information about the
radio’s configuration and operating parameters can be obtained from this
number; see Section 2.6,
Model Number Codes
, beginning on page 6.
MODEM [9600M, MPT1411]
This command selects the radio’s modem characteristics. Enter
9600M
for
digital operation supporting 9600 bps operation in compliance with the UK
MPT 1411 radio standard.
Enter
MPT1411
for analog operation with an
external
modem compliant with
the United Kingdom’s MPT 1411 radio standard. (
NONE
is an alias for
MPT1411
.)
The default selection for this command is MODEM 9600M.
NMASK [0000 0000–FFFF FFFF]
Table 8 and Table 9 listed the major and minor alarm classifications. It is
possible to reassign alarm outputs (illustrated in Figure 14 on page 19) to a
different category, and change which alarm events trigger an automatic
switchover in redundant master stations. However, this should be done rarely,
if ever.
The
AMASK
command (page 30) and
NMASK
command reclassify major and
minor alarm events, respectively, changing the alarm output relay status and
switchover conditions. These commands can be used to tailor a radio’s alarm
response. For example, a major alarm at a redundant master station causes
switch-over to the other transceiver board. By reconfiguring a minor alarm as
a major alarm, switch-over can be forced at the occurrence of a (formerly)
minor alarm condition.
Reclassifying alarms does not disable alarm notification
. The front panel
ALARM
LED illuminate, the alarm event is logged, and the
ALARM
and
STAT
commands show the alarm status.
Event Log screen, page 62
Clear Logs screen, page 62
Modem screen, page 54
Alarm Masks screen, page 59
