Tabor Electronics 5251, User Manual, Page: 185 / 298

4
Remote Programming Reference
Modulated Waveforms Control Commands
4-51
Sweep Modulation
Programming
Use the following command for programming the sweep
parameters. Sweep control is internal. The frequency will sweep
from start to stop frequencies at an interval determined by the
sweep time value and controlled by a step type determined by the
sweep step parameter.
There are two sweep modes: Linear, where the step of which the
generator increments from start to stop frequency is linear and
Logarithmic, where the step of which the generator increments from
start to stop frequency is logarithmic
The commands for programming the frequency sweep function are
described below.
SWEep:STARt<start_freq>(?)
Description
This specifies the sweep start frequency. The 5251 will normally sweep from start to stop frequencies
however, if the sweep direction is revered, the output will sweep from stop to start frequencies. The start
and stop frequencies may be programmed freely throughout the frequency of the standard waveform
frequency range.
Parameters
Name Range Type Default Description
<start_freq> 10 to
100e6 Numeric 10e3
Programs the sweep start frequency. Sweep start is
programmed in units of Hz.
Response
The 5251 will return the present sweep start frequency value. The returned value will be in standard
scientific format (for example: 100mHz would be returned as 100e-3 – positive numbers are unsigned).
SWEep:STOP<stop_freq>(?)
Description
This specifies the sweep stop frequency. The 5251 will normally sweep from start to stop frequencies
however, if the sweep direction is revered, the output will sweep from stop to start frequencies. The start
and stop frequencies may be programmed freely throughout the frequency of the standard waveform
frequency range.
Parameters
Name Range Type Default Description
<stop_freq> 10 to
100e6 Numeric 1e6
Programs the sweep stop frequency. Sweep stop is
programmed in units of Hz.
Response
The 5251 will return the present sweep stop frequency value. The returned value will be in standard
scientific format (for example: 100mHz would be returned as 100e-3 – positive numbers are unsigned).