Keysight n1921a Operating And Service Manual page 27

Figure 2-1
4 Zero and calibrate the standard and incident sensors on channels A and B
5 Set the frequency of the signal source to 50 MHz and power level to 0 dBm.
6 Set the frequency of the N1912A channels A and B to the same frequency as
7 Measure the standard power (P
8 Repeat steps 5 to 7 for other frequencies with the same power level.
9 Turn off the RF output of the signal source.
10 Remove the standard sensor from the N1912A channel A.
11 Connect the device-under-test (DUT, N1921/2A) to the N1912A channel A.
12 The test equipment setup is as shown in
Keysight N1921A and N1922A Operating and Service Guide
Sensor accuracy performance test setup for the N1921/2A
(50 MHz to 18 GHz)
Power meter
B
A
respectively.
Turn on the RF output.
the signal source.
channel B. Compute and record the power ratio (P
the current frequency and power level, based on the following equation:
Performance Tests and Adjustments
Signal source
Incident sensor
) of channel A and incident power (P
STD
P (dB) = P
ratio STD
Power splitter
Standard sensor
) of these channels for
ratio
– P
INC1
Figure 2-2.
2
) of
INC1
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