User Manual

Remote operation
Communicatio
ns examples
Basic selection and
returning of r esults
The results a re returned using the FRD command. This returns the results that are
shown on the screen, in the order in which they appear on the screen. As results
are selected
using remote control, the results are added to the bottom of the list,
with the exception of harmonics, which always appear at the end of the list.
:INST:NSEL 1
Sets the current group as group 1
:SEL:CLR
Clears all results from all groups
:SEL:VLT
:SEL:AMP
:SEL:FRQ
:SEL:WAT
:SEL:VAS
:SEL:VAR
:SEL:PWF
:SEL:VPK+
:SEL:APK+
:FRD?
Returns V
rms
,A
rms
, Frequency, Watts, VA,
VA
r
, power factor, V
pk+
and V
pk-
in floating
point format.
:FRF?
Returns the results selected for confirmation
using the label that appears on the display.
In this case will return, “Vrms, Arms, Freq,
Watt, VA, VAr, PF, Vpk+, Apk+”
Returning results
repeatedly
The power analyzer updates the res ults at the specified update rate. To return
results as soon as they are available, set up the DSE register to enable bit 1, the
New Data Available (NDV) bit. Then read the DSR register using the ":DSR?"
command until it indicates that there is new data available, and then send a
":FRD?" command to get selected results.
:DSE 2 // This enables the NDV bit.
While strDSR <> "2"
:DSR?
strDSR = received data
Loop
:FRD?
Receive results
PA3000 Power Analyzer User Manual 97