Keysight Technologies 8480 Series, Operating And Service Manual

Page: 46 / 99

2 General Information
46 Keysight 8480 Series Operating and Service Manual
3 Launch the Interactive IO on the Keysight IO Libraries Suite to send SCPI
commands to the DUT.
4 Reset the power meter in a known state by sending
“*RST”
command,
followed by
“SYST:PRES”
command to pre-set the meter's output to its
default value.
5 Connect the DUT to the power meter 1 mW calibrator and perform zeroing for
the DUT by sending
“CAL:ZERO:AUTO ONCE”
.(Please use the recommended
adapter for the respective model)
6 Perform calibration for the DUT by sending
“CAL:AUTO ONCE”
.
7 Set the frequency of the DUT to 50 MHz by sending
“FREQ 50MHz”
.
8 Enable auto-averaging for the DUT by sending
“AVER:COUN:AUTO ON"
.
9 Change the power measurement unit of the DUT to watt by sending
“UNIT:POW W”
.
10 Disconnect the DUT from the power meter 1 mW calibrator.
11 Perform zeroing for the DUT by sending
“CAL:ZERO:AUTO ONCE”
.
12 Set the DUT to the single trigger mode by sending
“INIT:CONT OFF”
.
13 Read the noise level of the DUT by sending
“READ”
and then record the
reading.
14 Repeat step 13 for 10 times and then calculate the mean value of the readings.
15 Compare the calculated mean value to the system specification. If the test
fails, refer to “Adjustments” on page 50.
Power linearity performance verification
The power linearity performance verification measures the relative linearity error
of the 8480. All measurements are performed at 50 MHz. The reference power
level for the linearity measurement is 0 dBm for the 8483A and -30 dBm for
8481/5/7D.
This performance verification requires the following equipment:
– signal generator (N5182A)
– thermocouple-based average power sensor, as a reference sensor
(N8481A/5A/7A)
– power meter (E4416/7A)