SCPI Programming Reference
HDG2000 Series Arbitrary Waveform Generator
66
5.2.1 AM Subsystem
The AM subsystem allows you to add amplitude modulation (AM) to a carrier waveform.
SOURce<n>:MOD:AM:DEPTh <depth>|MINimum|MAXimum
SOURce<n>:MOD:AM:DEPTh? [MINimum|MAXimum]
Parameter
Typical Return
0% to 120%, default 50%
+5.00000000001
Set the modulation of CH1 to 50%: SOURce1:MOD:AM:DEPTh 50
To achieve modulation depth greater than 100%, output carrier amplitude may be reduced.
With AM:SOURce EXTernal, carrier waveform is modulated with an external waveform.
SOURce<n>:MOD:AM:INTernal:FREQuency <frequency>|MINimum|MAXimum
SOURce<n>:MOD:AM:INTernal:FREQuency? [MINimum|MAXimum]
Set frequency of modulating waveform. The waveform chosen as modulating source will operate
at that frequency, within waveform frequency limits.
Parameter
Typical Return
2 mHz to 500 kHz
+1.00000000002
Set the modulation frequency of CH1 100Hz
：
SOURce1:MOD:AM:INTernal:FREQuency 100
When you select an arbitrary waveform as the modulating source, the frequency changes to
the frequency of the arbitrary waveform, which is based on the sample rate and the number of
points in the arbitrary waveform.
This command should be used only with the internal modulation source (
AM:SOURce
INTernal
).
SOURce<n>:MOD:AM:INTernal:FUNCtion SINusoid|SQUare|RAMP
SOURce<n>:MOD:AM:INTernal:FUNCtion?
Selects shape of modulating waveform.
Parameter
Typical Return
SINusoid|SQUare|RAMP, default SINusoid
SINusoid, SQUare, or RAMP
Select a square wave as the modulating waveform of CH1:
SOURce1:MOD:AM:INTernal:FUNCtion SQUare
This command should be used only with the internal modulation source (
AM:SOURce
INTernal
).
Pulse and DC cannot be carrier waveform for AM.
SOURce<n>:MOD:AM:SOURce INTernal|EXTernal
SOURce<n>:MOD:AM:SOURce?