Operating instructions

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Block Flow Diagram of Audio and RF signals in 9154(T50)
05/9 A
8-Apr-2003 10:28:51
D:\Protel Files\Copies from Crocodile\t50_4.ddb - Issue4\BLOCK_DIAGRAM.Sch
Title
Size: Number: Print Date: File:
Revision:
Sheet of
A4
RF Technology Pty Ltd
Unit 10, 8 Leighton Place
Hornsby, NSW 2077
AustraliaRev. Release Date: Originator:
Tone+ Tone-
Low Pass
Filter (250Hz)
Limiter
Digital
Potentiometer
Buffer
Summing Amplifier
Buffer
Line2+ Line2-
T300
Line2+ Line2-
T301
VCA VCA
Pre-emphasis
Flat
Summing Amplifier
Pre-emphasis
Flat
Pre-emphasis
Microphone input
Amplifier
20dB gain
Limiter
Summing Amplifier
Low Pass
Filter (3kHz)
Digital
Potentiometer
Buffer
Amplifier
6dB gain
Loop Detect
Modulation PLL
Modulation
Reference Oscillator
VCO
Channel PLL
Reference Oscillator
VCO
RF
Amplifier
Voltage Controlled
RF
Amplifier
RF
Amplifier
RF
Amplifier
RF
Amplifier
Low Pass
Filter (350MHz)
Low Pass
Filter (300MHz)
Passive Mixer
Low Pass
Filter (55MHz)
Low Pass
Filter (55MHz)
RF
Output
RF
Amplifier
RF
Amplifier
3200
External Reference Input
uP
uP
uP
uP
uP
uP
uP
uP
uP uP
uP
uP
uP
uP
uP
uP
uP
uP
uP
Set Synthesiser
Dividers
Centre Frequency
Adjustment
Set Synthesiser
Dividers
Centre Frequency Adjustment
Lock Detect and
Reference Osc. Detect
Lock Detect and
Reference Osc. Detect
uP uP
+12V
uP
Loop/Volts
Select
Maximum Deviation
Setting
VCA
uP
Balance
Line 1
Line 2
Maximum Tone Deviation
Setting
uP
Balanced Differential
Amplifier
CTCSS Generator
uP
uP uP
Deviation Control
Deviation Control
and
Dir. Aud. (Tone IN) Deviation
Control
Varactor
Bias
uP
Varactor Bias
uP
Line
Potentiometer
uP
Vref
Line Level In
External Ref. Div.
Peak Detector
uP
Line Level Sense
High Speed Coupler
GPS
GPS+ GPS-
uP
Temp. Sensor
uP
Temp.
VCA: Voltage Controlled Amplifier VCO: Voltage Controlled Oscillator uP: Microprocessor Input or Output PLL: Phase Locked Loop