Metering Circuit - SAC SS-800AVS Manual

2.2.11 Metering Circuit
The Metering Circuit provides measurements of RF output power, DC
current in one of the final transistors, a tuning indication, and
two DC voltage scales.
The RF power is measured by using a current transformer in the
output circuit. The emitter volts measurement is a DC voltage
measurement across one of the one ohm emitter resistors, and thus
gives a direct measurement of DC current in the final transistors.
Two voltage ranges are also provided for external measurements with
a probe. A tuning indication is derived from a reflected power
measurement in the antenna coupler.
ss-800AvS
Southern Avionics
'57
Company