Keysight 81150A - Page 394

Appendix
394
Command
:FSKey[1|2]:SOURce[?]
Long
[:SOURCE]:FSKey[1|2]:SOURce[?]
Parameters
{INTernal[1]|INTernal2|EXTernal}
Parameter Suffix

Description
Select an INTernal or EXTernal FSK source. The default is INT[1]. The
:FSK[1|2]:SOUR? query returns “INT”,“INT2” or “EXT”. When
the INTernal1 source is selected, the rate at which the output frequency
“shifts” between the carrier frequency and hop frequency is determined by
the FSK rate specified (FSK:INT:RATE command). INT2 selects the other
channel of the instrument (if available). When the External source is
selected, the output frequency is determined by the signal level on the rear-
panel Modulation-In connector. When a logic low level is present, the carrier
frequency is output. When a logic high level is present, the hop frequency is
output.
If you select the other channel as the modulation waveshape (“INT2”) the
SCPI command FSK[1|2]:INT:RATE doesn’t apply.
Example
:FSK1:SOUR EXT