Tait TM9100 Service Manual

72 Circuit Descriptions TM9100 Service Manual
© Tait Electronics Limited August 2005
Figure 3.4 Block diagram of the frequency synthesizer circuitry
Coupler
PLL
MOD
5V SWITCH
SYNTX LO SYN RX LO1
TR SWITCH
VCO (VHF only)
DIG SYNTR SW
PLL
Summer
5V
VP SUPPLY
Loop
Filter
VCO
Supply
Filter
+5V DEC VCL SUPPLY
+5V
VP
Frequency Synthesizer
LPF
Mixer
VCXO
TCXO
Modulator BufferAmplifier
PLL
MOD
VCO 2
VCO 1
Buffer
Amplifiers
and
Coupler
5V SwitchTR Switch
VCO (UHF only)
+6V0
AGND +3V0AN
Power
Supply
CDCVCXO MOD SYN CDC FCL SYN CDC LFV CDCVCO MOD
CODEC
and
Audio
SYNTX LO
SYN RX LO1
Trans-
mitter
SYN RX OSC
Receiver
Digital
Board
DIG SYN SPI DO DIG SYN SPI CLK DIG SYNTR SW DIG SYN EN DIG SYN FAST DIG SYN LATCH SYN LOCK SYN DIG FREF
14V
SMPS
BufferAmplifier
Interface
Inverter
+9V0
Signal Types:
RF analog clock digital asynchronous serial data synchronous serial data

Tait TM9100 Specifications

General

Brand	Tait
Model	TM9100
Category	Radio
Language	English