Codan Radio Communications VT-3A130-F User Manual
User's Guide
The VT-3A130 Transmitter is a synthesized multichannel AM transmitter designed to interface
with the MT-3 Repeater Systems, while still maintaining MT-2 system compatibility. Both MT-3
systems are characterized by dependable low maintenance performance under the most severe
environmental conditions. In addition, all units are burnt-in for 24 hours and are accompanied by
a complete test report.
The VT-3A130 Transmitter operates in the 118 - 137 MHz aviation band. The transmitter’s
frequency stability is controlled by an OST-3A138 AM Enhanced Synthesizer. The Synthesizer
module can be programmed for up to 16 channels. A channel programmer can preprogram the
first 15 channels; channel 16 can be programmed from the front panel and channel 1 can be
programmed by the four BCD switches located on the MT-3 AM Transmitter Main Board.
The VT-3A130 modular transmitter family is compatible with all Daniel’s subrack and base station
enclosures.
with the MT-3 Repeater Systems, while still maintaining MT-2 system compatibility. Both MT-3
systems are characterized by dependable low maintenance performance under the most severe
environmental conditions. In addition, all units are burnt-in for 24 hours and are accompanied by
a complete test report.
The VT-3A130 Transmitter operates in the 118 - 137 MHz aviation band. The transmitter’s
frequency stability is controlled by an OST-3A138 AM Enhanced Synthesizer. The Synthesizer
module can be programmed for up to 16 channels. A channel programmer can preprogram the
first 15 channels; channel 16 can be programmed from the front panel and channel 1 can be
programmed by the four BCD switches located on the MT-3 AM Transmitter Main Board.
The VT-3A130 modular transmitter family is compatible with all Daniel’s subrack and base station
enclosures.
Transmitter Features
Compatibility
MT-2 Series and MT-3 Series Radio Systems
Frequency Generation
Synthesized (internal plug-in module)
Channel Selection
In 25 kHz increments selected by four BCD switches
Preset capability for 16 channels selectable through external control
Preset capability for 16 channels selectable through external control
Front Panel Control
One 3 position switch:
- NORM (repeat mode)
- OFF
- KEY TX PTT Activation:
- Active to ground with time-out timer
- Active to ground without time-out timer
- Microphone activated without time-out timer
- Front Panel switch (KEYED) without time-out timer, (NORM) with or
without time-out-timer.
- NORM (repeat mode)
- OFF
- KEY TX PTT Activation:
- Active to ground with time-out timer
- Active to ground without time-out timer
- Microphone activated without time-out timer
- Front Panel switch (KEYED) without time-out timer, (NORM) with or
without time-out-timer.
Amplifier Enable
Active to ground