User's Manual

Speed TxRx
Miltel Communications Ltd. 8
2.2.3 Receiver
The input signal from either ports is routed with the T/R switch to the receiver section. The signal
is filtered, amplified and further filtered by a high selectivity SAW filter. Local Oscillator
leakage is greatly reduced by the reverse isolation of the amplifier and mostly by the Narrow band
SAW filter.
The Receiver is a double down converter super_het receiver. The 2nd IF output is applied to an
FM discriminator that demodulates the signal and reproduces the digital data which is transferred
to the Repeater. A shielded 5-wire cable connects the Transceiver to a Repeater or a Concentrator.
2.2.4 Controller
The controller receives and sends data to and from the Repeater or the Concentrator. When a data
should be transmitted, The Controller turn on the voltages to the Transmit section and modulates
the transmitter VCO. The Controller is a single chip with integral RAM and ROM.
2.2.5 Regulator
The DC regulator filters The DC voltage from the Repeater or the Concentrator and distributes
the power accordingly.