User's Manual

Speed TxRx User Manual
Miltel Communications Ltd. 7
Figure 2-2: Speed TxRx Block Diagram
Antenna
Antenna
VCO
Phase Locked
LOOP(PLL)
MC13176
Crystal
13.56MHz
Internal
adjustment range
433.92MHz +/-
35KHz
433.92MHz
VCO
Crystal
13.56MHz
Diversity
switch
T/R
switch
SAW filter
433.92MHz BPF
& LNA
10.7MHZ 1
st
IF
VCO
Crystal
10.245MHz
423.22MHz LO
455KHz 2
nd IF
FM Demodulator
Coaxial Cables
Harmonic Filter
& Attenuator
Dipole
Dipole
Transmitter
Transceiver Enclosure
Receiver
Controller
DC
Regulator
To Repeater
or Concentrator