HP 3325B - Page 78

HP 3325B Remote Operation Command Set
MOAR; Write Modulation Source Arbitrary Waveform Data
The MOAR command defines an arbitrary waveform for the modulation source. From
1 to 4096 waveform sample points can be programmed. A value of 0 corresponds to 0.0 volts,
and +1.0 corresponds to full scale which is half the MOAM voltage (since MOAM is in
peak-to-peak). Issuing this command turns the modulation source off, so it should be
followed with a MOFU3 command.
When using arbitrary waveforms, the MOFR command sets the frequency at which the
entire waveform block is repeated. Only certain discrete frequencies are available and these
depend on the number of entries in the waveform. The HP 3325B selects a frequency as near
as possible to the value entered with the MOFR command.
Command Availability
IVIOAR
HP 3325B Yes
HP 3325A No
Where value is a waveform sample whose value ranges from -1.0 to +1.0.
Example:
MOAR 1,0,-0.4,0 ENT results in the following waveform:
^ 1 . 0
0
- 1 . 0
2-46