System Accuracy Verification - Keysight 8990B Service Manual

1 Performance Verification and Adjustments
6 Select 1.05 GHz CW on the 8990B to turn on the check source.
7 Perform zeroing and calibration for the N1923/4A with the RF signal.
8 After the zeroing and calibration is completed, turn off the sensor check
9 Set the horizontal scale to the Linear scale.
10 Measure the average power.
11 Collect each mean value of the average power reading for one minute. The
12 If the calculated zero set value is out of specification (>200 nW), refer to
13 Set the 8990B RF input channel 1 frequency to 50 MHz.
14 Select 50 MHz CW on the 8990B to turn on the check source.
15 Repeat
16 If the calculated zero set value is out of specification (>550 nW), refer to
17 Repeat

System accuracy verification

The purpose of this verification is to verify the accuracy of the 8990B after a period
of usage to ensure that the Peak Power Analyzer is still within its published
specifications.
This performance verification requires the following equipment.
Equipment for low power verification (-35 to +10 dBm):
– PSG analog signal generator (E8257D, with Option 1EU)
– Power sensor (N8481A/N8487A)
– Power meter (N1914A/E4417A)
– Power splitter (11667A)
– PEAK Power Analyzer and sensor [DUT] (8990B and N1923A/N1924A)
24
source.
mean value is the system zero set value for the 8990B with the N1923/4A.
"Adjustments" on page 51.
step 7 to step
"Adjustments" on page 51.
step 7 to step 16
11.
for the RF input channel 4.
Keysight 8990B Service Guide