Keysight Technologies N5244/5B Service Manual page 81

Tests and Adjustments
Performance Tests
For the two cables between the power splitter and attenuators, choose
short but flexible cables.
Figure 3-14 Dynamic Accuracy at Low Frequency Setup
If the Analyzer Fails this Test:
— If the analyzer fails this test, rerun the test.
— If the analyzer fails this test repeatedly, run the DC continuity test. Refer to
— If the analyzer still fails this test, replace the A70 LFE board and repeat this
— If the analyzer fails this test repeatedly, replace the A23 mixer brick for a
— If the analyzer still fails this test, replace the A12 SPAM board and repeat
Keysight N5244B/45B Service Guide
"DC Continuity Test the LFE Board and Test Ports (Available With Low
Frequency Extension (LFE) Installed Option 205/220/405/420/425)" on
page 3-50 and to "Removing and Replacing the A70 or A75 Low
Frequency Extension (LFE) Board" on page
test. Refer to "Removing and Replacing the A70 or A75 Low Frequency
Extension (LFE) Board" on page
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
Mixer Bricks" on page
this test. Refer to "Removing and Replacing the A4–A17 Boards (For
analyzers with serial numbers prefixed MY/SG/US5201 and above)" on
page 7-24.
7-74.
7-74.
"Removing and Replacing the A27 and A28
7-48.
3-49