Monitoring Section - NEC DTU-70 Instruction Manual

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Monitoring Section

This transmitter is provided with meters to allow output power check of the transmitter
and parameters of each PA. The output power is detected by the detector circuit in the TX
control unit and displayed by digital indication on LCD display. Further, monitor section
incorporates an output power lower and higher detect circuit and in case the output power is
not normal, an output power fault answer is sent to the TX control section. The monitor
section is also furnished with telemetry, playing an important role in the control and
monitoring of the transmitter.
The parameters of each PA are sent to the TX control section.
EXCITER
TS INPUT
PA 1
PA n
divider
Fig. 3-7 Metering Circuit for RF Signals
3 - 16
combiner
TX CONTROL
GWP-G22996
OUTPUT