Tait TM8115

66 Circuit Descriptions TM8100/TM8200 Service Manual
© Tait Electronics Limited June 2006
Figure 3.2 Block diagram of the transmitter circuitry
RF
Connector
Receiver
LPF
Directional
Coupler
PA
Forward Power Buffer Amplifier
Power Control
PIN
Switch
Driver Exciter
Bias
Limiter
Shaper
and Level
Shifter
Shaper
and Level
Shifter
Crowbar
Shaping
Filter
Tempera-
ture
Sensor
Buffer Amplifier
TX RX RF
Thermal Coupling
OR Gate
Switch
TX INH
+9V0 TX +13V8 BATT DIG TX INH DIG SYN EN SYN LOCK SYN TX LO
Power
Supply
Digital
Board
Frequency
Synthesizer
CDC TX DRV BIAS CDC TX FIN BIAS1 CDC TX FIN BIAS2 CDC TX PWR CTL TX TEMP TX FWD PWR TX REV PWR
CODEC
and
Audio
Interface
AGND
Signal Types:
RF analog clock digital asynchronous serial data synchronous serial data
Transmitter
Reverse Power Buffer Amplifier (40W/50W only)