Racal Instruments 2461 User Manual page 183

External Arming
All functions (with the exception of phase) can be armed by means of an EXT ARM input
connector. The various modes can be selected via special functions.
External Arming Sources
'EXT ARM' input (front panel); VXI 'TTLTrig0-7' (user selectable).
EXT ARM Input
Input Impedance:
Coupling:
Input Levels:
Vil maximum
Vih minimum
Maximum Input Level:
(CAUTION)
Connector:
ARM Modes
Mode
1
2
3
4
5
6
7
8
9
A-24
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1 kΩ nominal
DC
0.4V
2.4V
10V RMS, or +15V or -15V peak
MCX female
Start Stop
SELF ARM SELF ARM
SELF ARM
SELF ARM
SELF ARM
SELF ARM
User Manual 2461 Type C