Bnc 645 User Manual download pdf (Page 49)

Figure 4-11

Press the Mod button to toggle on the modulation output.

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.

Press the softkey under Src to toggle between internal source (Int)

and external source (Ext) for selecting modulating waveform

source.

If internal source is selected:

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.

Press the softkey under PM Freq and use numeric keypad or

the knob with the cursor keys to set the desired modulating

frequency.

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.

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}

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Bnc 645 User Manual Page 49