Checking The Signal Separation Group - Agilent Technologies N5242A Service Manual

PNA Series Microwave Network Analyzers
N5241A/42A

Checking the Signal Separation Group

Before checking the signal separation group assemblies, you must open the analyzer.
CAUTION 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 cover from the analyzer. Refer to
Procedures described in this document are performed with power
WARNING
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.
CAUTION 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.
Checking the Output Power of the A, B, C, and D Signals
Using a power meter, you can measure the outputs of the A, B, C, and D signals from the
front panel. The measurement results will help you isolate a faulty assembly. The output of
the R receiver cannot be measured because it would necessitate breaking the phase lock
loop, causing all of the signals to be lost.
Equipment Used for This Check
Equipment Type
Power meter
Power sensor, 3.5 mm
Adapter, 3.5 mm (f) to 3.5 mm (f)
Equipment Setup
1. Before starting these checks, zero and calibrate the power meter. (See the power meter
user's guide for instructions on setting the calibration factor.)
2. If the
Receiver Display
the following: Press UTILITY
Receiver Display
.
3. Set the sweep speed for a 10 second sweep: Press STIMULUS
Sweep Time
. Set the time to 10.000 seconds in the
Service Guide N5242-90001
Model or
Part Number
E4418B/E441B
E8485A
83059B
(Figure 4-6 or Figure
, then
System
Measurement System Troubleshooting
"Removing the Covers" on page
Alternate Model or
Part Number
E4418A/E4419A
None
85052-60012
4-7) is not on the analyzer screen, perform
Service Utilities
, then
Sweep
box.
Sweep Time
Troubleshooting
7-6.
, then
, then
4-33