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User Manual 3155
FM:FUNCtion:SHAPe?
Response and default
The 3155 returns SIN, TRI, SQU, or RAMP depending on its present setting. Default is SIN.
FM:FREQuency<FM_freq>
Purpose
This command sets the modulating wave frequency. This parameter affects the 3155 when set to operate
in FM:FUNC:MODE FIX
•
<FM_freq> sets the frequency of the modulating waveform
Parameter type
Numeric
Parameter range
<FM_freq>
1e-3 to 100e6 in units of Hertz
FM:FREQuency?
Response and default
The 3155 returns the present modulating waveform frequency value. The returned value is in standard sci-
entific format (for example: 100mHz would be returned as 100E-3 – positive numbers are unsigned). Default
value is 1e3.
FM:FREQuency:RASTer<FM_sclk>
Purpose
This command sets the modulating wave sample clock frequency. This parameter affects the 3155 when set
to operate in FM:FUNC:MODE USER
•
<FM_sclk> sets the sample clock frequency of the modulating waveform
Parameter type
Numeric
Parameter range
<FM_sclk>
1e-3 to 2e6 in units of samples per second
FM:FREQuency:RASTer?
Response and default
The 3155 returns the present modulating waveform sample clock frequency value. The returned value is in
standard scientific format (for example: 1KHz would be returned as 1E3 – positive numbers are unsigned).
Default value is 1e6.
Programming Reference 4-31
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