User's Manual

Model 1150A DVOR
2-4 Rev. - November, 2008
This document contains proprietary information and such information may not be disclosed
to others for any purposes without written permission from SELEX Sistemi Integrati Inc.
The RF monitor assembly functions as an RF detector/amplifier and distributor of the detected RF signals. The
assembly also contains the dummy load for the standby transmitter carrier RF signal. The RF Monitor includes built-
in dummy loads for the four sideband signals.
The Audio Generator CCA generates and processes all of the modulation signals transmitted by a DVOR transmitter
and generates the power level and phase control signals needed to operate the transmitter and commutator. It is also
responsible for monitoring the operational status of the transmitter.
The DVOR system uses two sideband generator assemblies for each transmitter. Each sideband generator contains
one Sideband Generator CCA.
The Sideband Generator amplifies the CW RF signal from the frequency synthesizer to the operational output power
levels.
MONITOR MONITOR
RMS
CO-LOCATED
DME / TACAN
RCSU
LOCAL
CONTROL
UNIT
(LCU)
PMDT
INTERFACE
CIRCUIT
CARD
BCPS1
BCPS2
LV
PS
LV
PS
+28
+12
-12
+5
+28
+12
-12
+5
Synth Disable
Audio Modulation
Disable
Field
Monitor
Antenna
Restart
VOR
Status
Keying, RMM
Remote Control
Alarm
Indication
Current Data, Settings
Current Data, Settings
-50 to +10 dBm
Alarm
Indication
Figure 2-2 Simplified DVOR Control and Monitoring Block Diagram