Keysight N9038A MXE Service Guide 253
RF Downconverter Section
RF Downconverter Section Troubleshooting
Signal Path Verification
Low Band Signal Path (20 Hz to 3.6 GHz)
1.
Remove the instrument dress cover (MP24) and top brace (MP10). Refer to
Chapter 18, “Assembly Replacement Procedures.”
for instructions on
removing these covers.
2.
Remove the hardware that attaches the front frame assembly to the
chassis and slide it away from the rest of the instrument, but do not
disconnect W8 which connects it to the A8 Motherboard assembly. Refer
Chapter 18, “Assembly Replacement Procedures.”
for instructions on
removing the front frame assembly.
3.
, disconnect W14 from the A13 RF
Front End assembly Output (J7).
Before verifying the functionality of the A13 RF Front End assembly make sure that the 1st LO
signal from the A14 LO Synthesizer assembly as well as the 4800 MHz 2nd LO signal from the
A16 Reference assembly are both of the correct frequency and amplitude. Refer to
and
Chapter 9, “Reference Assembly.”
for detailed information on
how to verify these signals.
If there is a particular frequency of interest use that instead of the 100 MHz used in this example.
Be aware that the gain at higher frequencies in low band will have a slightly lower gain than that
shown in this example.
Summary of Contents for N9038A
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Page 16: ...16 Contents ...
Page 130: ...130 Keysight N9038A MXE Service Guide Instrument Messages Condition Messages ...
Page 354: ...354 Keysight N9038A MXE Service Guide Analog Digital IF A3 Digital I F Troubleshooting ...
Page 406: ...406 Keysight N9038A MXE Service Guide Block Diagrams Block Diagrams Block Diagrams ...
Page 429: ...448 Keysight N9038A MXE Service Guide Block Diagrams Block Diagrams Reference Block Diagram ...
Page 431: ...450 Keysight N9038A MXE Service Guide Block Diagrams Block Diagrams ...
Page 627: ...646 Keysight N9038A MXE Service Guide Post Repair Procedures Post Repair Procedures ...
Page 639: ...658 Keysight N9038A MXE Service Guide Post Repair Procedures Post Repair Procedures ...
Page 643: ...662 Keysight N9038A MXE Service Guide Instrument Software Software Updates ...
Page 741: ...760 Keysight N9038A MXE Service Guide Tests Intermittent Unsteady Drifting Disturbances ...
