Performance Tests
Instrument Accuracy Test
2-8 HP EPM-441A/442A Service Guide
Procedure
The following procedure should be performed for the Instrument Accuracy
Test.
Note The procedure details the key presses required on the
HP EPM-441A. For the HP EPM-442A the equivalent key presses
should be performed on both channels.
1. Connect the equipment as shown in Figure 2-2.
2. Switch the power meter on.
3. Press then .
4. Press , for a reading in watts.
5. Set the range calibrator as follows:
RANGE............................................ 3
µW
POLARITY ...................................... NORMAL
FUNCTION..................................... STANDBY
LINE ............................................... ON
Note When switching the range calibrator to STANDBY, allow enough
time for the range calibrator to settle to its zero value before
attempting to zero the power meter. This settling would appear on
the power meter display as downward drift. When the drift has
reached minimum, (typically less than 60 seconds), the range
calibrator is settled.
6. On the power meter press ,
,
select 512 from the pop up window then press .
7. On the power meter press , . Wait approximately 10
seconds for the wait symbol to disappear. Verify that the display
reads 0
±0.05 µW.
8. Set the range calibrator’s FUNCTION switch to CALIBRATE.
9. Set the range calibrator’s RANGE switch to 1 mW.
10. Press to calibrate the power meter.
11. Set the range calibrator’s RANGE switch to the positions shown in
Table 2-3 on page 2-9. For each setting, verify that the power
meter’s reading is within the limits shown.
Preset
Local
Confirm
dBm/W
W
System
Inputs
Input Settings Filter
Enter
Zero
Cal
Zero
Cal
4402serv.book Page 8 Monday, March 11, 2002 11:34 AM
To Next Page
Loading...
Need help?
General
