5
External triggering 2-way frequency sweep measurement
Use the following SCPI commands for external triggering 2-way frequency sweep measurement.
Table 3. Procedures to configure the N1911A/12A power meter for Power Sweep mode
SCPI Description
Agilent ESG/MXG/PSG signal generator
SYST:PRES Preset the instrument to its default settings
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
FREQ:START 50MHz Set start frequency to 50 MHz (example)
FREQ:STOP 6000MHz Set stop frequency to 6000 MHz (example)
SWEEP:POINTS 596 Set frequency sweep points to 596 (example)
POWER:LEVEL 5DBM Set output power level to 5 dBm (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 at the TRIGGER IN connector
LIST:DWEL:TYPE STEP Select the dwell time from the step sweep
POWER:MODE FIX Stop a power sweep. Enable signal source to operate at a fixed power level
FREQ:MODE LIST Select the Swept Frequency mode
Agilent P-Series power meter
SYST:PRES Preset the instrument to its default settings
SENS:DET:FUNC AVERAGE Set measurement mode to average for CW\average power measurement
TRIG:SOUR EXT Set to external triggering which is require for frequency sweep operation
OUTP:TRIG EXT Set power meter trigger output to external triggering
OUTP:TRIG ON Enable 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 596 Set buffer count to 596 (example)
SENS:FREQ:START 50MHz Set start frequency to 50 MHz (example)
SENS:FREQ:STOP 6000MHz Set stop frequency to 6000 MHz (example)
SENS:FREQ:STEP 596 Set frequency step to accept 596 steps (example)
INIT:CONT ON Set to Free Run mode to accept continuous trigger cycles
*OPC Enable the operation complete command and set the operation complete bit in the Standard Event Status
Register when all pending device operations 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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