Features and Functions 3
Keysight 34980A Mainframe User’s Guide 179
The following command retrieves scanned readings and alarm data from reading
memory (the readings are not erased).
FETCH?
Using the Alarm Output Lines
Four TTL alarm outputs are available on the rear-panel Alarms connector. You can
use these hardware outputs to trigger external alarm lights, sirens, or send a TTL
pulse to your control system. You can assign an alarm to any configured channel
and multiple channels can be assigned to the same alarm number. Each alarm
output line represents the logical “OR” of all channels assigned to that alarm
number (an alarm on any of the associated channels will pulse the line).
Alarms connector (as viewed from rear of instrument)
1
2
3
Reading with Units (26.195 °C)
Date (November 21, 2004)
Time (3:30:23.000 PM)
4
5
Channel Number
Alarm Limit Threshold Crossed
(0 = No Alarm, 1 = LO, 2 = HI)
2.61950000E+01 C,2004,11,21,15,30,23.000,1003,2
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