Pulsar TCF-10B, System Manual, Page: 118 / 249

11.1 Transmitter Module
Description
The function of the TC–10B/TCF–10B
Transmitter Module is to provide the RF signal
which drives the 10W
PA Module. The
Transmitter’s frequency range is from 30 kHz to
535 kHz, programmable in 0.1 kHz (100 Hz) steps
by four rotary switches on the Transmitter. The
Transmitter is slaved to a crystal oscillator.
The TC–10B/TCF–10B Transmitter Module
operates from keyed inputs (set by jumpers at the
Keying Module):
• High-Level Key
• Any Transmitter Key
• Voice Key
• Shift High (TCF–10B only)
• Shift Low (TCF–10B only)
The Transmitter Module also operates with a
signal from the Optional Voice Adapter Module:
• AM Voice
The Transmitter Module operates with either no
shift or one of three different frequency shifts,
selectable by a four-position DIP switch (S5).
11.1.1 Transmitter Control Panel
(This panel is shown in Figure 1-1.)
Operator controls consist of four thumbwheel
switches (with indicator windows), representing
the frequency range:
• SW1 (x 100 kHz)
• SW2 (x 10 kHz)
• SW3 (x 1 kHz)
• SW4 (x 0.1 kHz)
After pulling the module, use a screw driver to set
the thumbwheel switches: CW for higher
frequency, CCW for lower frequency.
11.1.2 Transmitter PC Board
(The Transmitter PC Board is shown in
Figure 11-1.)
Operator controls are as described below.
Potentiometers
R13 Adjusts high-level (10 W) output
R12 Adjusts low-level (1 W) output
R14 Adjusts voice (4.3 W) output level
R1 Adjusts modulation of transmitter
signal (peak-to-valley ratio of signal
envelope)
Copyright © 1997 Pulsar Technologies, Inc.
Chapter 11. Transmitter Module
11
Schematic 1355D71-8
Parts List 1610C01-11
Group Description
G01 TRANSMITTER 2- OR 3-FREQUENCY
G02 TRANSMITTER 2- OR 3-FREQUENCY
W/Trip Test Unit
Table 11–1. 1610C01 Styles and Descriptions.