Agilent Technologies 8753ET User Manual page 81

High Power Configuration Two
Figure 1-54 shows a full 2-port forward direction high power measurement. In this configuration the
maximum power from test PORT 1 and test PORT 2 is 0.10 watt or 20 dBm.
NOTE
This is only an example configuration for high power applications. Actual device values need
to be determined for each individual application.
Figure 1-54 High Power Configuration Two
An external amplifier and coupler are connected between the RF OUT and the RF IN access ports to the
transfer switch.
The coupled arm of the external coupler must be connected to the R CHANNEL IN port. Maximum
recommended power to the R CHANNEL input is 10 dBm, so depending on the coupling factor of the
external coupler, an attenuator may need to be added to the R CHANNEL path.
Maximum power to the RF IN port is 26 dBm. With the PORT 1 or PORT 2 SWITCH/COUPLER ports
connected, the approximate loss from RF IN to either test PORT is 6 dB at 3 GHz, and 8 dB at 6 GHz. The
approximate loss for the Option 075 is 8 dB at 3 GHz.
Maximum power to PORT 2 from the DUT is 2 watts or 33 dBm. Attenuators need to be added to the A and B
sampler ports to reduce the power to the samplers. An isolator was added to the PORT 2 SWITCH/COUPLER
ports to reduce power to the transfer switch. Maximum power to the transfer switch is 26 dBm. Some
compression may occur above 123 dBm.
NOTE Isolators must be inserted so that maximum isolation is achieved from the COUPLER to the
SWITCH ports. Refer to the isolators' manufacturer specifications for more information.
Making Measurements
Measuring Amplifiers
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