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@
MOTOROLA
INC.
Communications
Group
MOTOROLA HF.SSB
Automatic Antenna Tuner
Models
T1961A and T1962A
Installation Procedure
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1. INTRODUCTION
(Refer to Figure 1.)
1.1 Motorola HF-SSB Automatic Antenna Tuners,
Models T1961A and TI962A, are antenna match-
ing networks rated at 125 watts peak-envelope-power
(PEP). Model T1961A Antenna Tuner matches the im-
pedance of an end-fed antenna (vertical whip or random
length wire) into a nominal 50-ohm impedance source
with a frequency range from 2-to-18 MHz. Model
T1962A Antenna Tuner performs the same impedance
match, but it can be used only with a 23' whip antenna
and at a frequency range from 2-to-9 MHz.
1.2 AutomatiC
tuning
is
accomplished
through
microprocessor control of reed relays that switch
inductors and capacitors in and out of the matching net-
work. The balance
of this installation
procedure
describes preinstallation
instructions,
installation in-
structions and ground systems for the radio and the
antenna tuner.
FAEPS-3000S-0
"5381
Figure 1. AutomaticAntenna
Tuner
.2.
PREINSTALLA TION INSTRUCTIONS
2.1
TUNE POWER ADJUSTMENT
....
,
"7
CAUTION
The
following
adjustments
to
the
TRITON 20 or TRITON 12 and 24 chan-
nel radios must be performed before mak-
ing electrical connections to the antenna
tuner.
2.1.1
TRITON 20 Adjustment
Step 1.
In
the
TRITON
20 instruction
manual
(68P81044E20),
refer
to
the
TRN4038A
Power
Amplifier circuit board overlay and schematic.
Step 2.
With the radio in the TUNE MODE, adjust
potentiometer R441 for 3 watts :t 1 watt of power out-
put into a 50-ohm resistive load.'
2.1.2
TRITON 12 and 24 Channel Adjustment
Step 1. In the TRITON 12 and 24 channel radio in-
struction manuals (68P81O30E35 and 68P81O34EO5),
refer to the TLN1752A Power Amplifier circuit board
overlay and schematic diagram.
Step 2.
With the radio in the TUNE MODE, adjust
potentiometer R41 for 3 watts :t 1 watt of power output
into a 50-ohm resistive load.
@ Motorola,
Inc. 1979
All Rights Reserved
Printed in U.S.A.
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1301 E.Algonquin Road, Schaumburg, II.60196
68P81110E64-0
5/15/SD-PHI
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