VXI 3002 - Manual (Page 54)

3-24
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 [not used alone]
:MODE Select Mode of operation for Sweep generator (single or continuous)
Data type : Character Program Data (either SNGL or CONT)
Allowed suffices : None
Default suffix : None
Example: SWEEP:MODE SNGL
:TYPE Select type of sweep (linear or logarithmic)
Data type : Character Program Data (LIN or LOG)
Allowed suffices : None
Default suffix : None
Example: SWEEP:TYPE LOG
:TRIG
Data type : Character Program Data (any one of OFF, START, STARTSTOP,
STEP)
Allowed suffices : None
Default suffix : None
Example: SWEEP:TRIG STARTSTOP
SWEEP? 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