4-14 Service Guide N5227-90001
Troubleshooting PNA Series Microwave Network Analyzers
Front Panel Troubleshooting N5227A
Checking the Front Panel Keys
To check the front panel keys, push each key and compare the name in the Key Label box to the name
physically labeled on the key cap. These names are also in Tabl e 4 -2 below.
• If all the key names are correct, then the front panel keypad is working. If some of the keys are not
working, suspect a faulty keypad. To replace the keypad, refer to “Removing the A1 Front Panel Interface
Board and Keypad Assembly” on page 7-8.
• If none of the keys are working correctly, suspect a faulty A1 front panel interface board. To replace the
A1 front panel interface board, refer to “Removing the A1 Front Panel Interface Board and Keypad
Assembly” on page 7-8.
Table 4-2 Front Panel Keyboard Key Names
TRACE/CHAN
Keys
RESPONSE
Keys
ENTRY
Keys
ENTRY
Keys (Cont’d)
Trace 1
Meas OK k/m
Trace 2 Format Cancel
Enter
Off
Trace 3
Scale Help . (decimal point)
Trace 4
Display Bk Sp +/-
Traces Avg 0
STIMULUS
Keys
Receiver
Cal 1 Freq
Navigation
Keys
MARKER/
ANALYSIS Keys
2Power
Marker 3 Sweep
Search 4 Trigger
Memory 5
UTILITY
Keys
Analysis 6 Save
Click
7Print
8Macro
9 Recall
G/n System
M/u Preset
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