Checking The Source Group - Keysight Technologies N5224/5A Service Manual

Troubleshooting
Measurement System Troubleshooting

Checking the Source Group

Source Group Tests
Before checking the source group assemblies, you must open the analyzer.
Use an antistatic work surface and wrist strap to reduce the chance of
electrostatic discharge for all of the procedures in this chapter.
1. Turn off the analyzer power.
2. Unplug the power to the analyzer and disconnect all front and rear panel
connections except installed jumpers.
3. Remove the outer and inner covers from the analyzer. Refer to
the Covers" on page
Procedures described in this document are performed with power
supplied to the product while protective covers are removed. Energy
available at many points may, if contacted, result in personal injury.
4. With the covers off, plug in the analyzer and turn on the power.
Do not operate the analyzer with the outer cover removed for more than
30 minutes, as this could cause the analyzer to overheat which could
result in costly damage.
Frequency Banded vs. Broadband Failure
There are two main types of failures that are related to the source group.
Frequency banded failures are indicated by all receiver traces having partial
dropouts across the frequency range. Broadband failures are indicated by all
receiver traces being in the noise floor.
RF Signal Troubleshooting
Check the output power of the A, B, C, and D signals:
Equipment Used for This Check
Equipment Type
Power meter
Power sensor, 2.4 mm
Adapter, 2.4 mm (f) to 2.4 mm (f)
4-32
7-7.
Model or
Part Number
E4418B/E4419B
E8487A
11900B
Keysight N5224A/25A Service Guide
"Removing
Alternate Model or
Part Number
E4418A/E4419A
None
85056-60007