Command Description R&S SMB
1407.0806.32 6.34 E-2
[SOURce:]FM:EXTernal:DEViation 0 … 40 MHze
The command enters the deviation of the external FM signal The deviation of the internal source
must not exceed the deviation of the external source in case of modulation source Int+Ext.
Example:
FM:EXT:DEV 3kHz
'sets an external modulation depth of 3 kHz
*RST value Resolution Options SCPI
1 kHz - Compliant
[SOURce:]FM:MODE NORMal | LNOise | HDEViation
The command sets the mode for the frequency modulation.
Parameters: NORMal
The maximum range for modulation bandwidth and FM deviation is available.
LNOise
Frequency modulation with phase noise and spurious characteristics close to
CW mode. The range for modulation bandwidth and FM deviation is reduced
(see data sheet).
HDEViation
Frequency modulation with full setting range for FM deviation. The range for
modulation bandwidth is reduced (see data sheet).
Example:
FM:MODE?
'queries mode for frequency modulation.
Response: NORM
'normal mode, the maximum range for modulation bandwidth and FM
deviation is available.
*RST value Resolution Options SCPI
NORMal 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
To Next Page
Loading...
