Externally Leveling The Synthesizer; Leveling With Detectors/Couplers /Splitters; L-11. Alc Circuit Externally Leveled - HP 8360 User Handbook Manual

Externally Leveling
the Synthesizer
Leveling with
Detectors/Couplers
/Splitters
In externally leveled operations, the output power from the
synthesizer is detected by an external sensor. The output of this
detector is returned to the leveling circuitry, and the output power
is automatically adjusted to keep power constant at the point of
detection.
Figure l-11 illustrates a typical setup for external leveling. When
externally leveled, the power level feedback is taken from the external
negative detector input rather than the internal detector. This
feedback voltage controls the ALC system to set the desired RF
output. Refer to Figure A-l in Chapter 2, for a block diagram of the
synthesizer's ALC circuitry.
Figure l-1 1. ALC Circuit Externally Leveled
LEVELED OUTPUT
Getting Started Advanced 1-23