Keysight 81150A - Modulating Source

Appendix
198
3.8.7 Modulating Source
Introduction
The 81150A / 81160A will accept modulation from an internal or external
modulation source. In case of internal modulation, the modulation signal can
be the ‘other channel’ (2 channel instrument only) or the internal modulation
source of the modulated channel.
Modulating Source
 Internal, External or Channel. The default is Internal.
 If you select the External source, the carrier waveform is modulated
with an external waveform. The frequency deviation is controlled by
the ±2.5V/±5V signal level present on the rear-panel Modulation In
connector. For example, if you have set the deviation to 100 kHz, then
a +2.5V/+5V signal level corresponds to a 100 kHz increase in
frequency. Lower external signal levels produce less deviation and
negative signal levels reduce the frequency below the carrier
frequency. Note: the 81160A offers a fix ±2.5V input range. The
81150A offers a selectable ±2.5V or ±5V input range.
0 V
+2.5 V/+5 V
-2.5 V/-5 V
Front-Panel
Operation
After enabling FM, press the FM Source softkey.
Remote Interface
Operation
:FM[1|2]:SOURce {INTernal[1]|INTernal2|EXTernal}