Equipment; Test Setup; Procedure - Agilent Technologies 4418B Service Manual

Equipment

• Test power meter: Agilent 432A.
• Thermistor mount: Agilent 478A option H75 or H76.
• Digital voltm eter (DVM): Agilent 3458A.

Test Setup

Power Meter

Procedure

Use the following proc edure to perform the test:
Steps 1 to 7 of this proc edure require pre-requisite knowledge of some
Note
Agilent 432A and 478A parameters. Refer to Appendix A for further
information.
1. V CR is measured using a network analyzer that has a low measurement
uncertainty at 50MHz. Here's the test procedure:
(a) Connect the thermistor mount to the 432A.
(b) Calibrate the network analyzer using an 85032B N-Type cal kit (or
(c) Set the center frequency of the network analyzer to 50MHz, and the
(d) Connect the thermistor mount to the network analyzer.
(e) Ensure the 432A mount resistance is set to 200R.
(f ) Measure the VCR of the thermistor mount =
(g) Change the 432A mount resistance is set to 100R.
Agilent E4418B/E4419B Service Guide
Test Power Meter
Power
ref
V
V
Thermistor
mount
Figure 2-7: Output Standing Wave Ratio T est Setup
an equivalent kit).
span to 5MHz.
Γ
•
Record | = ________
|
1
Output Standing Wave Ratio (SWR) Test
Digital V oltm eter
RF
comp
Per formance Tests
+ input
- input
Γ
| |
1
2-25