12
Overview
All 2000 series transceivers and receivers are made up of several common building blocks and they are all
constructed in the same common chassis. The man-pack consists of a 2050 transceiver mated with a 2040
manpack adaptor which contains the battery management system, battery pack and automatic antenna
tuner. When mated with the man-pack adaptor all connections to the transceiver are through military
standard connectors.
This manual deals with each module and has a separate section describing sections of transceiver and
receiver that are unique to that transceiver or receiver.
The 2050 transceiver and 2050R receiver all have the following three modules:-
* Control
Head
* Microprocessor/RF
PCB
*
Power amplifier PCB
The 2040 man-pack comprises the 2050 transceiver mated with the 2040 man-pack adaptor which contains
following modules described later in this manual:-
*
Battery management system PCB
*
Automatic antenna tuner PCB
*
Connector transition PCB
*
Signal transition PCB
Control Head
The control head consists of one main PCB and a 128 x 64 LCD graphic display module and a 23 key
backlit keypad. Connections for the microphone and control head cable are made by RJ-45 8 way
connectors.
The control head communicates to the main body of the transceiver using RS-232 protocol at 33.6k baud.
The control head can be operated up to 50 meters from the transceiver main body. The loudspeaker output
connector is by a 3.5 mm jack.
Programming of the transceiver can be done from the infrared port located on the lower front centre window
of the control head.
The remote head contains its own microprocessor to drive the display and scan the keyboard, but otherwise
contains no controlling intelligence.
Microprocessor/ RF Audio PCB
Microprocessor section
This section contains the PGA based micro processor, DSP which processes received and transmitted
audio, memory, Direct Digital Frequency Synthesiser (DDFS), power supplies and audio power amplifier. It
also contains all interface circuits to the rear panel connector, the control head and the RF power amplifier.
RF section
The RF section contains the receiver, the transmitter exciter and the noise blanker. The receiver employs a
double conversion superheterodyne design with a high dynamic range. All receiver signals are processed
through either a single sideband filter which has a pass band of 2.4 KHz, or in the case of FSK (F1B)
signals, through a narrow sideband filter with a pass band of 500Hz (or other optional bandwidths).
