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

Equipment

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

Test Setup

Power Meter
Thermistor
mount

Procedure

Use the following procedure to perform the power reference level test:
Note The procedure details the key presses required on the
Agilent E4418B. For the Agilent E4419B the equivalent key presses
should be performed on both channels.
1. Set the DVM to measure resistance:
Connect the DVM between the V
Agilent 432A and pin 1 on the thermistor mount end of the sensor cable.
Verify that no power is applied to the Agilent 432A.
2. Round off the DVM reading to two decimal places and note this value
3. Connect the equipment as shown in Figure 2-4, ensuring that the DVM
Note Ensure that the Agilent 432A and the power meter under test have
been powered on for at least 30 minutes before moving to step 4.
Agilent E4418B/E4419B Service Guide
Test Power Meter
Power
ref
V
RF
V
comp
Figure 2-4: Power Reference Level Test Setup
as the internal bridge resistance (R) of the Agilent 432A
(approximately 200 Ω).
• R ____________Ω
input leads are isolated from chassis ground.
Power Reference Level Test
Digital Voltmeter
connector on the rear panel of the
RF
Performance Tests
+ input
-input
2-17