Performance Verification and Adjustments
1
Keysight 8990B Service Guide
23
Performance Verification
Zero set verification
Zero set is defined as the amount of residual offset error that is present following a
zero operation. This offset error is caused by contamination from several sources,
including circuit noise. This test is a system-level verification which requires the
N1923/4A wideband power sensor.
Required test equipment:
– 1 unit of N1923/4A wideband power sensor
System specification:
–
<
200 nW (frequency >500 MHz)
– <550 nW (frequency <500 MHz)
Test procedure
1
Turn on the 8990B.
2
Connect the N1923/4A to the 8990B as shown in
.
Figure 1-1
Zero set verification setup
3
Allow the system to warm up for approximately an hour.
4
Set the 8990B RF input channel 1 frequency to 1 GHz.
5
Connect the N1923/4A to the sensor check source of the 8990B.
8990B
N1923/4A
Содержание 8990B
Страница 1: ...Keysight 8990B Peak Power Analyzer Service Guide ...
Страница 12: ...12 Keysight 8990B Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...
Страница 16: ...16 Keysight 8990B Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...
Страница 18: ...18 Keysight 8990B Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...
Страница 62: ...2 Theory of Operation 62 Keysight 8990B Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...
Страница 136: ...4 Repair Guide 136 Keysight 8990B Service Guide Figure 4 54 Remove the seven screws ...
Страница 150: ...4 Repair Guide 150 Keysight 8990B Service Guide THIS PAGE HAS BEEN INTENTIONALLY LEFT BLANK ...