If Gain Test; Front Isolation Test - Agilent Technologies E4991A Service Manual

Troubleshooting
External Tests Failure Troubleshooting

IF Gain Test

This test is to check if the IF Gain(IF=12.5kHz, 10kHz) on A4 Board works normally.
Required Equipment
Description
Calibration Kit
Procedure
The following is the procedure to perform the IF Gain Test.
Step 1. Connect the Test Head to the instrument.
Step 2. Open the External Test dialog box as described in "To Execute the External Test" on
page 189.
Step 3. Click on External Test dialog box.
5.IF Gain
Step 4. Connect the 50ohm Termination of the 16195B to DUT Port on the Test Head. Then click
.
OK

Front Isolation Test

This test is to isolate PORT1 and PORT2 on A4 Board.
Required Equipment
Description
50 ohm Termination(N)
N(m)-N(m), 61cm Cable
Procedure
The following is the procedure to perform the Front Isolation Test.
Step 1. Make sure that noting is connected to the instrument.
Step 2. Open the External Test dialog box as described in "To Execute the External Test" on
page 189.
Step 3. Click
6.Front Isolation
Step 4. Connect RF OUT and PORT2 using N Cable, and connect the 50ohm Termination(N) to
PORT1. Then click
Step 5. Click
OK & Next>>
Step 6. Connect RF OUT and PORT1 using N Cable, and connect the 50ohm Termination(N) to
PORT2. Then click
Step 7. Click
OK & Next>>
192
Recommended Model
16195B (50 ohm)
Recommended Model
HP 909C Opt.012
11500B
on External Test dialog box.
.
OK
to go to the next test.
.
OK
to go to the next test.
Chapter 4