Additional Sense Commands - HP 6811B User Manual

Additional Sense Commands

The following additional sense commands are provided with the HP Dual Power Analyzer (Option
020/022). These commands let you select a measurement source and the frequency measurement channel
for the Power Analyzer input.
SENSe:NSELect
Selects the measurement source that will return data when a query is sent. A parameter value of 1 selects
the Main Output, which measures the actual output voltage and current of the ac source. A value of 2
selects the Power Analyzer input, which measures the voltage and current at the V SENSE and I SENSE
input channels. Note that this command is similar to, but not the same as, the command
INSTrument:NSELect that is used in 3-phase sources.
Only the following commands are affected by the measurement source selection:
•
Queries beginning with MEASure or FETCh
•
SENSe:CURRent:ACDC:RANGe <range>
Command Syntax SENSe:NSELect <NR1>
Parameters
*RST Value
Examples SENS:NSEL 2
Query Syntax SENSe:NSELect?
Returned Parameters <NR1>
SENSe:FREQuency:SOURce
This command selects the frequency measurement source for the Power Analyzer input. It only applies
when the Power Analyzer input is active.
Accurate frequency measurements are critical when making all Harmonic measurement calculations.
Other measurement calculations also use frequency measurement values, but they only slightly affect the
accuracy of the measurement. The ac source normally measures the frequency at the V SENSE input
channel. With this comand you can select the I SENSE input channel as the frequency measurement
source for the Power Analyzer input.
NOTE:
For Main Output measurements, the ac source uses the programmed output frequency
value when making measurement calculations.
Command Syntax SENSe:FREQuency:SOURce <source>
Parameters
*RST Value
Examples SENS:FREQ:SOUR CURR
Query Syntax SENSe:FREQuency:SOURce?
Returned Parameters <CRD>
12
1 | 2
1
VOLTage | CURRent
VOLTage