RIGOL DG1000Z Series - Manual (Page 138)

RIGOL Chapter 2 Command System
2-126 DG1000Z Programming Guide
:SOURce[:MOD]:FM Commands
[:SOURce[]][:MOD]:FM[:DEViation]
Syntax [:SOURce[]][:MOD]:FM[:DEViation] {|MINimum|MAXimum}
[:SOURce[]][:MOD]:FM[:DEViation]? [MINimum|MAXimum]
Description Set the FM frequency deviation of the specified channel.
Query the FM frequency deviation of the specified channel.
Parameter Name Type Range Default
[] Discrete 1|2 1
Real Refer to the “Explanation” 1kHz
Explanation  When [:SOURce[]] or [] is omitted, the system sets the related
parameters of CH1 by default.
 The frequency deviation is the deviation of the modulating waveform frequency
( [:SOURce[]][:MOD]:FM:INTernal:FREQuency ) relative to the carrier
frequency. The frequency deviation must be lower than or equal to the carrier
frequency. The sum of the frequency deviation and carrier frequency must be
lower than or equal to the sum of the current carrier frequency upper limit and
1kHz.
 If Sine is currently selected as the carrier waveform, the carrier amplitude will be
limited at 2Vpp when the sum of the frequency deviation and carrier frequency is
greater than the current carrier frequency upper limit.
 When external modulation source is selected
( [:SOURce[]][:MOD]:FM:SOURce ), the frequency deviation is controlled by
the ±5V signal level of the [Mod/Trig/FSK/Sync] connector of the
corresponding channel at the rear panel. Positive signal level corresponds to
frequency increase and negative signal level corresponds to frequency decrease.
Lower level will generate less deviation. For example, if the frequency deviation is
set to 1kHz, +5V signal level corresponds to a 1kHz increase of frequency and
-5V signal level corresponds to a 1kHz decrease of frequency.
Return Format The query returns the frequency deviation in scientific notation with 7 effective digits,
for example, 1.000000E+02 (the frequency deviation is 100Hz).
Example :SOUR1:FM 100 /*Set the FM frequency deviation of CH1 to 100Hz*/
:SOUR1:FM? /*Query the FM frequency deviation of CH1 and the query
returns 1.000000E+02*/
Related
Commands
[:SOURce[]][:MOD]:FM:INTernal:FREQuency
[:SOURce[]][:MOD]:FM:SOURce