3-40 Keysight N5224B/25B Service Guide
Tests and Adjustments
Performance Tests
3-
3.
The power sensor is disconnected and the test cable is attached to the
analyzer port under test.
4.
Both sources are turned on and the signal generator’s frequency is set to 2
Hz above the analyzer’s frequency. By combining these two signals
together, the resultant signal will be a perfect sine wave with a magnitude
which varies from -17 dBm to -23 dBm at a rate of 2 Hz.
5.
The analyzer’s receiver measurement is retrieved and compared with a
perfect sine wave. Any deviation is due to receiver non-linearity.
6.
The test set’s output attenuator is changed in 5 dB steps from 0 to 60 dB,
and this measurement is repeated.
7.
With the 1 dB of overlap in each measurement, the data for each
attenuator setting can be stitched together to provide a complete receiver
linearity profile from +3 dBm to -63 dBm.
8.
This test is repeated for each receiver.
If the Analyzer Fails this Test:
— If the analyzer fails this test, rerun the test.
— If the analyzer fails this test repeatedly, replace the A23 mixer brick for a
Port 1 or Port 2 failure or the A24 mixer brick for a Port 3 or Port 4 failure,
then repeat this test. Refer to
“Removing and Replacing the A27 and A28
— If the analyzer still fails this test, replace the A12 SPAM board and repeat
this test. Refer to
“Removing and Replacing the A4–A17 Boards” on
.
Dynamic Accuracy at Low Frequency (Available with LFE Option
205/220/420/425)
1
This description applies to all instruments with low frequency extension (LFE)
Option 205, 220, 405, 420, and 425.
Function of the Test: This test will be set to the LFE path at 99.6 MHz. The test
procedure is the same as the Dynamic Accuracy test process except that the
LFE test process uses a 2-channel function generator as the source which has
sufficient power range to cover each power step. Therefore a test set is not
required.
Specification Tested: Dynamic Accuracy at Low Frequency
Equipment Used:
— Function generator (33622A)
— Power splitter (11667B)
— Fixed attenuator (10dB x2) – (8493C Option 010)
1. Your model PNA may not have available all of the LFE Options listed.
Содержание N5224B
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Страница 212: ...5 50 Keysight N5224B 25B Service Guide Theory of Operation Receiver Group Operation 5 Figure 5 17 4 Port Receiver Group...
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Страница 220: ...5 58 Keysight N5224B 25B Service Guide Theory of Operation Power Supply Group Operation 5...
Страница 225: ...Keysight N5224B 25B Service Guide 6 5 Replaceable Parts Rebuilt Exchange Assemblies Figure 6 1 Module Exchange Procedure...
Страница 490: ...6 270 Keysight N5224B 25B Service Guide Replaceable Parts Replaceable Parts Listings 6...
Страница 608: ...8 102 Keysight N5224B 25B Service Guide General Purpose Maintenance Procedures Correction Constants 8...
Страница 612: ...Appendix 4 Service Guide EEPROM Address Assignments and Location N5224 5A B PNA and N5244 5A B PNA X Instruments...
Страница 613: ...Installation Note Xxxxx xxxxx 3...