Sweep mode

To make these commands operational they must first be enabled by the CFRQ:MODE SWEPT command. These commands enable you to select the sweep mode between single shot and continuous sweep and between linear and logarithmic sweep. You can also select the triggering mode from the following:

OFF Disable the trigger.

START The first trigger input causes the carrier sweep to commence sweeping. Any other trigger inputs whilst sweeping are ignored. Only at the end of each sweep is the trigger latch reset ready for the next input.

STARTSTOP The first trigger input starts the carrier sweep and the following trigger input pauses it, so that the user can investigate a particular point of interest. The next trigger input continues the sweep from where it was paused. At the start of each sweep the trigger latch is reset ready for the next input.

STEP Each trigger input steps the sweep on by one frequency step. The trigger latch is reset after each step ready for the next step.

SWEEP

:MODE

Data type :

Allowed suffices :

Default suffix :

Example:

:TYPE

Data type :

Allowed suffices :

Default suffix :

Example:

:TRIG

Data type :

Allowed suffices :

Default suffix :

Example:

SWEEP?

[not used alone]

Select Mode of operation for Sweep generator (single or continuous)

Character Program Data (either SNGL or CONT)

None

None

SWEEP:MODE SNGL

Select type of sweep (linear or logarithmic)

Character Program Data (LIN or LOG)

None

None

SWEEP:TYPE LOG

Character Program Data (any one of OFF, START, STARTSTOP, STEP)

None

None

SWEEP:TRIG STARTSTOP

Prepares message containing information on Sweep Mode type and trigger in the following format:

:SWEEP:MODE <mode>;TYPE<type>;TRIG<trig>

where:

<mode> is character program data indicating the sweep

 

mode selected, <type> is character program data indicating

 

type selected, and <trig> is character program data indicating

 

the trigger type selected

Example: :SWEEP:MODE CONT;TYPE LOG;TRIG STEP

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Image 54
VXI 3002 manual Sweep mode, Sweep?