BNC 645 - Manual (Page 49)

49
Figure 4-11
2. Press the Mod button to toggle on the modulation output.
3. Press the softkey under Type and press the softkey under PM to
select phase modulation. A phase modulation output will be
generated with the current parameters.
4. Press the softkey under Src to toggle between internal source (Int)
and external source (Ext) for selecting modulating waveform
source.
5. If internal source is selected:
a. Press the softkey under Shape to toggle between different
types of modulating waveform. If arbitrary waveform (Arb) is
selected as modulating signal source, the modulating signal
source is depending on the previous waveform selection in
arbitrary function. One may toggle the Mod key to see the
arbitrary modulating waveform message that temporarily
displayed on the screen.
b. Press the softkey under PM Freq and use numeric keypad or
the knob with the cursor keys to set the desired modulating
frequency.
6. Press the softkey under PhaseDev to set the phase deviation if
needed. Use numeric keypad or the knob with the cursor keys to
enter your value.
7. Press the Graph button to view all the waveform parameters.
Remote interface operation
Use these commands to output a phase modulation waveform:
FUNCtion {SINusoid|SQUare|RAMp|USER}
FREQuency {<frequency>|MINimum|MAXimum}
VOLTage {<amplitude>|MINimum|MAXimum }
VOLTage:OFFSet {<offset>|MINimum|MAXimum }
PM:INTernal:FUNCtion
{SINusoid|SQUare|RAMp|NRAMp|TRIangle|NOISe|USER}
PM:INTernal:FREQuency {<frequency>︱MINimum|MAXimum}