8194B, 8195B, 8197B
Spectracom Corporation
GPS Ageless Master Oscillator Instruction Manual
4-4
4.3.2 Alarm
Timeouts
The command
ATx
reads or sets the time out period allotted for tracking alarms AT1,
AT2 and AT3. The default time out periods are
AT1
= 1 minute, AT2 = 2 1/2 hours
,
and
AT3
= 30 days
.
When the receiver is unable to track at least four qualified satellites a count down timer
is started. If the receiver is unable to reacquire qualified satellites within the assigned
time out periods the expired time out alarm is asserted. An AT1 alarm is classified as a
Minor alarm. AT2 and AT3 are Major alarms.
To read the current time out values issue the
ATx
command as follows:
Type:
ATx <ent>
Where x = 1, 2, 3.
Example Response:
ALARM TIMEOUT x = DDD HH:MM:SS
Where x = 1, 2, 3
DDD
=
Days
000
…
999
HH = Hours 00 … 23
:
=
Colon
Separator
MM = Minutes 00 … 59
SS = Seconds 00 …59
To change the alarm time out periods, place the unit in set mode and issue the
ATx
command as shown below:
Type:
ATx DDD HH:MM:SS
Response:
ALARM TIMEOUT x = DDD HH: MM:SS
