Lo Power Adjustment - Agilent Technologies PNA Series Service Manual

PNA Series Microwave Network Analyzers
E8361A

LO Power Adjustment

The LO power adjustment is used to adjust the power level of the LO signals from the A20
LO distribution assembly. This adjustment is done for only one LO output. The differences
between each LO output is negligible; therefore, separate adjustments are not required.
Equipment used for the LO Power Adjustment
Equipment Type
Power meter
Power sensor, 2.4 mm
Adapter, 3.5 mm (m) to 2.4 mm (f)
5/16-inch, open-end torque wrench
(set to 10 in-lbs)
1/4-inch, open-end wrench
a. The E4413A 3.5 mm power sensor may be used instead of the 8487A power
sensor and 11901D adapter.
Procedure
1. Turn off the network analyzer and remove the power cable and other external cables
from the rear panel.
2. Remove the outer cover. Refer to
3. Place the analyzer on its side to allow access to the bottom of the analyzer.
4. Connect the equipment as shown in
analyzer and the power meter.
5. With a 5/16-inch open-end wrench, loosen W15 at the first converter (mixer).
6. At the junction of W15 and W14, place a 5/16-inch wrench on the W15 connector and a
1/4-inch wrench on the W14 connector. While holding the 1/4-in wrench to prevent W14
from rotating, disconnect W15 from W14 and move W15 aside.
7. Connect the power sensor to the end of W14, as shown in
Figure 3-20 Setup for the LO Power Adjustment
Service Guide E8361-90001
Model or Alternate Model
Part Number or Part Number
E4418B/E4419B E4418A/E4419A
8487A
E4413A
11901D
N/A N/A
N/A N/A
"Removing the Covers" on page
Figure 3-20. Connect a GPIB cable between the
Tests and Adjustments
Adjustments
a
7-6.
Figure 3-20.
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