Rohde & Schwarz SMC100A - Page 245

R&S SMC100A Command Description
1411.4060.32 6.43 E-1
[SOURce:]FM:EXTernal:DEViation 0 … 40 MHz
The command enters the deviation of the external FM signal
E
xample:
FM:EXT:DEV 3kHz
'sets an external modulation depth of 3 kHz
*RST value Resolution Options SCPI
1 kHz - Compliant
[SOURce:]FM:SENSitivity?
The command queries the input sensitivity of the MOD EXT input in Hz/V. The command is only
effective if the external modulation source is selected (SOUR:FM:SOUR EXT). The returned value
depends on the modulation deviation setting (SOUR:FM:DEViation). This value is assigned to the
voltage value for full modulation of the input.
The command is a query command and therefore has no *RST value.
Example:
FM:DEV 5E3
'sets a modulation deviation of 5 kHz.
FM:SENS?
'queries the input sensitivity at the MOD EXT input.
Response: 5E3
'since the voltage value for full modulation is 1V, the resulting sensitivity is
precisely 5000Hz/V.
*RST value Resolution Options SCPI
- - Compliant
[SOURce:]FM:SOURce EXT | INT
The command selects the modulation source for frequency modulation. INT is the internal
modulation source which is configured in the SOURce:LFOutput subsystem. The external signal is
input at the MOD EXT connector."
Example:
FM:SOUR INT
'selects the internal modulation source.
*RST value Resolution Options SCPI
INTernal - Compliant
[SOURce:]FM:STATe ON | OFF
The command activates/deactivates frequency modulation.
Activation of frequency modulation deactivates phase modulation.
Example:
FM:STAT ON
'activates FM modulation.
*RST value Resolution Options Correlation SCPI
OFF - FM ON deactivates phase modulation. Compliant