Agilent Technologies 8753ET User Manual page 80

High Power Configuration One
Figure 1-53 shows a one-path 2-port forward direction high power measurement. In this
configuration the maximum power from test PORT 1 is 1 watt or 30 dBm. An external
amplifier and coupler are connected between the SWITCH and COUPLER access port for
PORT 1. The coupled arm of the external coupler must be connected through an external
switch to the R CHANNEL to maintain the phase lock in the forward direction.
This is only an example configuration for high power applications. Actual
NOTE
device values need to be determined for each individual application.
Figure 1-53 High Power Configuration One
A power divider must be placed between the PORT 2 SWITCH and PORT 2 COUPLER
ports with one leg of the divider connected through the external switch to the R
CHANNEL port to maintain the phase lock in the reverse direction. (A coupler could also
be used in place of the power divider.)
The recommended external switch for this application is the HP/Agilent 8762B Option
T24. The 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 PORT 2 is 2 watts or 33 dBm. Attenuators need to be added to the A
and B sampler access ports to reduce the power to the A and B samplers. An additional
attenuator must be added to the PORT 2 COUPLER/SWITCH ports to reduce the power to
the transfer switch.
Making Measurements
Measuring Amplifiers
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