Codan Radio Communications VT-3H040-S-HSO Manual Do Utilizador
Transmitter Main Board Instruction Manual IM20-MT3TXMN
1-1
1
GENERAL
1.1
Introduction
The MT-3 Transmitter Main Board integrates the MT-3 Front Panel Board, MT-3 Audio
Processor, Synthesizer or Crystal Controlled Oscillator module, and Amplifier module together to
comprise a MT-3 series transmitter (see section 5.1: MT-3 Transmitter Block Diagram). The Front
Panel Board and the Audio Processor are soldered directly to the Transmitter Main Board while the
Amplifier and the Synthesizer or Crystal Controlled Oscillator module are frequency band
sensitive, plug-in modules. Circuitry and jumpers on the Transmitter Main Board control the
operation of the modules as well as the overall operation of the MT-3 transmitter. Power and signal
connections are made through the 48 pin type 'F' connector on the rear of the Transmitter Main
Board where they are then routed to the other MT-3 modules. The front and rear panels are
attached to the Transmitter Main Board and together with the extruded aluminum shell, form the
transmitter enclosure.
Processor, Synthesizer or Crystal Controlled Oscillator module, and Amplifier module together to
comprise a MT-3 series transmitter (see section 5.1: MT-3 Transmitter Block Diagram). The Front
Panel Board and the Audio Processor are soldered directly to the Transmitter Main Board while the
Amplifier and the Synthesizer or Crystal Controlled Oscillator module are frequency band
sensitive, plug-in modules. Circuitry and jumpers on the Transmitter Main Board control the
operation of the modules as well as the overall operation of the MT-3 transmitter. Power and signal
connections are made through the 48 pin type 'F' connector on the rear of the Transmitter Main
Board where they are then routed to the other MT-3 modules. The front and rear panels are
attached to the Transmitter Main Board and together with the extruded aluminum shell, form the
transmitter enclosure.
Note:
LTR
TM
is a trademark of E.F. Johnson Co.
1.2
Performance Specifications
1.2.1
General Specifications
Type:
MT-3 Series Transmitter
Compatibility:
MT-3 Series Amplifier, OC-3 Crystal Controlled Oscillator
module, OS-3 and OS-3H Frequency Synthesizer modules.
Modulation:
11K0F3E or 16K0F3E (Frequency Modulation).
Operating Temperature Range:
-30˚C to +60˚C, optional -40˚C to +60˚C temperature test.
Operating Humidity:
95% RH (non-condensing) at +25°C.
Operating Voltage:
+9.5 VDC Regulated. +13.8 VDC Nominal (11 - 16 VDC).
Front Panel Controls:
NORM (repeat mode), OFF, and KEY TX (TX on).