Download Model 1281A

Remote Programming Reference
Instrument Control Commands
5
Response
The 1281A will return INT, or EXT depending on the present 1281A setting.
FREQuency{<freq>|MINimum|MAXimum}(?)
Description
This command modifies the frequency of the standard waveform in units of hertz (Hz). It has no affect on
arbitrary waveforms.
Parameters
Name
Range
Type
Default
Description
<freq>
50e0 to
400e6
Numeric
10e6
Will set the frequency of the standard waveform in
units of Hz. Although the display resolution for the
frequency setting is 9 digits only, the frequency
command can be used with resolutions up to 14
digits. The accuracy of the instrument however, can
only be tested to this accuracy using an external
reference that provides the necessary accuracy and
stability
<MINimum>
Discrete
Will set the frequency of the standard waveform to
the lowest possible frequency (50e0).
<MAXimum>
Discrete
Will set the frequency of the standard waveform to
the highest possible frequency (400e6).
Response
The 1281A will return the present frequency value. The returned value will be in standard scientific format
(for example: 100mHz would be returned as 100e-3 – positive numbers are unsigned).
FREQuency:RASTer{<sclk>|MINimum|MAXimum}(?)
Description
This command modifies the sample clock frequency of the arbitrary waveform in units of samples per
second (S/s). It has no affect on standard waveforms.
Parameters
Name
Range
Type
Default
Description
<sclk>
50e3 to
1200e6
Numeric
100e6
Will set the sample clock frequency of the arbitrary
and sequenced waveform in units of S/s. Although
the display resolution for the frequency setting is 9
digits only, the frequency command can be used with
resolutions up to 14 digits. The accuracy of the
instrument however, can only be tested to this
accuracy using an external reference that provides
the necessary accuracy and stability
<MINimum>
Discrete
Will set the sample clock frequency to the lowest
possible frequency (50e3).
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