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Making Measurements
Measuring Amplifiers
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.
NOTE This is only an example configuration for high power applications. Actual 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.
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