6
External triggering 2-way power sweep measurement
Use the following SCPI commands for external triggering 2-way power sweep measurement.
Table 4.
SCPI Description
Agilent ESG/MXG/PSG signal generator
SYST:PRES Preset the instrument to its default settings
FREQ 1000MHz Set frequency to 1000 MHz (example)
OUTP:STAT ON Turn on RF output
LIST:TYPE STEP Enable the frequency/power sweep list
INIT:CONT OFF Select to single list or step sweep
POWER:START -20DBM Set start power to –20 dBm (example)
POWER:STOP 10DBM Set stop power to 10 dBm (example)
SWEEP:POINTS 121 Set power sweep points to 121 (example)
TRIG:SOURCE BUS Enable GPIB triggering using the *TRG command
LIST:TRIG:SOUR EXT Enable the triggering of a sweep event by an externally applied signal at the TRIGGER IN
connector
LIST:DWEL:TYPE STEP Select the dwell time from the step sweep
POWER:MODE LIST Select the Swept Power mode
POW:ATT:AUTO ON Enable the signal source’s automatic loop control (ALC) to adjust the attenuator so that at a
specified RF power level the signal source’s RF output connector is maintained
FREQ:MODE FIX Select the stop frequency sweep and allow signal source to operate at a set frequency sweep
Agilent P-Series power meter
SYST:PRES Preset the instrument to its default settings
SENS:FREQ 1000MHz Set frequency to 1000 MHz (example)
SENS:DET:FUNC AVERAGE Set Measurement mode to average for CW\average power measurement
TRIG:SOUR EXT Set to external triggering which is required for the frequency sweep operation
OUTP:TRIG EXT Set power meter trigger output to external triggering
OUTP:TRIG ON Enable the trigger output port
SENS:AVER:COUNT 1 Set average count to 1 (example)
SENS:MRATE DOUBLE Set measurement speed to Double (example) to speed up the measurement
SENS:BUFF COUNT 121 Set buffer count to 121 (example)
INIT:CONT ON Set to Free Run mode to accept continuous trigger cycles
*OPC Enable operation complete command and set the operation complete bit in the Standard Event
Status Register when all pending device operation have completed
Wait 1 sec
Agilent ESG/MXG/PSG signal generator
INIT Initialize the signal source
*TRG Trigger the device if BUS is the selected trigger source
Agilent P-Series power meter
*ESR? Poll the status of the power meter by sending *ESR?. *ESR will return 1 when buffering is
completed
FETCH? Use FETCh? to retrieve all buffered measurements
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