Keysight n1921a Operating And Service Manual page 30

2 Performance Tests and Adjustments
10 Remove the standard sensor from the N1912A channel A.
11 Connect the device-under-test (DUT, N1922A) to the N1912A channel A.
12 The test equipment setup is as shown in
Figure 2-4
13 Zero and calibrate the DUT on the N1912A channel A.
14 Repeat steps 5 and 6.
15 Measure and record the power readings of channels A and B for the current
16 Repeat steps 14 and 15 for other frequencies with the same power level.
17 Turn off the RF output of the signal source.
18 Compute the accuracy error of the DUT for each frequency being measured at
Accuracy error (%) =
19 Compare the computed accuracy errors to the calibration uncertainty values in
20 Repeat steps 5 to 19 by sweeping through the power level from 10 dBm to
30
Sensor accuracy performance test setup for the N1922A
(26.5 GHz to 40 GHz)
Power meter
A B
frequency and power level, as P
the same power level, using the following equations:
Accuracy error (dB) = P
⎛
⎝
Table 2-2. If the test fails, refer to
18 dBm with frequencies from 26.5 GHz to 40 GHz.
Signal source
Incident sensor
(for channel A) and P
DUT
DUT
P P
(
–
DUT
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Anti log
"Adjustment"
Keysight N1921A and N1922A Operating and Service Guide
Figure 2-4.
KMIC amplifier
Power splitter
DUT
INC2
– (P + (P – P
INC2 STD INC1
+ P P
(
–
INC2 STD INC1
10
on page 37.
(for channel B).
))
) )
⎞
1 100
×
–
⎠