Copyright TEL
31/01/96
2.1
Introduction
The individual circuit blocks which make up the T836 and T837 are:
• synthesiser
• VCO
• audio processor
• drive amplifier
• power amplifier (T836 only)
• voltage regulators.
Each of these circuit blocks is set in its own shielded compartment, formed as an inte-
gral part of the main chassis.
The configuration of the circuit blocks may be seen on a functional level in Figure 2.1
and Figure 2.2. Refer to the circuit diagrams for more detail.
Figure 2.1 T836 High Level Block Diagram
Figure 2.2 T837 High Level Block Diagram
Audio
Processor
Synthesiser
Channel
Memory
+22dBm
Reference
Oscillator
12.8MHz
Microphone
Line
Transformer
Lock
Detect
Power Control
Drive
Amp.
PA
Directional
Coupler
Low Pass
Filter
Exciter
Output
(+27dBm)
Transmitter
Output
(25W)
Audio
Processor
Synthesiser
Channel
Memory
+22dBm
Reference
Oscillator
12.8MHz
Microphone
Line
Transformer
Lock
Detect
Power Control
Drive
Amp.
Exciter
Output
(800mW)
Summary of Contents for T830 Series
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