Keysight Technologies U3022BH10, User'S And Service Manual

Page: 63 / 124

U3022 B H10 High Power Measurements
High Power Measurements
The Test Set and the N5242A PNA-X can be configured to measure high power devices. This
ability is useful if the required power for the DUT is greater than what the analyzer can provide,
or if the maximum output power from the amplifier under test exceeds the safe input limits for
the analyzer. This section describes how to set up the analyzer and Test Set with external
couplers, attenuators, isolators and booster amplifiers to perform high power measurements.
•
The external couplers are used to provide reference power to the PNA-X (REF 1 and REF 2)
for accurate measurements.
•
The attenuators are used to protect the PNA-X receivers.
•
The isolators are used to protect the internal Test Set and PNA-X components . An eight
isolator and RF cable kit for the U3022BH10 is available (order Keysight U3020AK37).
•
The booster amplifiers are used to provide added gain.
When using high power configurations an attenuator must be placed in the
receiver path, and the couplers and isolators must be installed in the source
path or damage to the PNA-X, or the U3022
B H10 Test Set , will occur. Refer
to “Frequency Range and Maximum Power Levels” on page 1 6 .
Getting Started
A power meter is required for the following procedure.
1. Estimate the gain and power level needed to measure or force the DUT into compression. This
will determine the amount of power required from the source.
2. Determine the type of high power system to be configured. Refer to the following examples:
•
Figure 1 3 , “ RF Cable Interface Configuration” on page 2 6 . Used for the “ System Operational
Check s ” on page 27 .
•
Figure 53 , “Odd Ports (1 Watt)” on page 65 .
•
Figure 54 , “Port 1 (20 Watt)” on page 65 .
•
Figure 59 , “2-Way Power Configuration (1 Watt)” on page 71 .
3. Determine the ports that will be configured for high power source and receivers.
4. Measure the booster amplifiers gain. Refer to “Measuring Booster Amplifier Gain” on page 64 .
5. Set the power level out of the DUT. Refer to “Setting the Power Level at the Output of the DUT”
on page 67 .
6. Select the attenuator values for optimum PNA-X receiver and REF Inputs.
7. Configure the system for DUT measurement. Refer to “Calibrating the System and Measuring
the DUT” on page 73 .
U3022BH10 User's and Service Guide 63