©1999 Hamtronics, Inc.; Hilton NY; USA. All rights reserved. Hamtronics is a registered trademark. Revised: 4/29/04
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class C amplifiers always run cleanest
when driven to full power. If you
reduce drive too much, the base-
emitter junction of the pa transistor is
not fully turned on, and spurious
outputs can result. The optimum
drive level usually is about 10% less
than full saturation; stress is
considerably reduced while the
transistor is turned on well enough to
run clean.
When properly adjusted, the power
output should not sag appreciably
after the transmitter has been on for a
few minutes. Power sag of more than
about 2 Watts indicates overdrive, im-
proper heatsinking, or a bad antenna
system.
COR and CWID Adjustments.
Various timers and tone fre-
quencies for the COR and CWID and
courtesy beep functions are may be
set by touch tone command, with
defaults established by data burned
into the EPROM at the factory. Refer
to the separate OPERATION
instruction manual for details.
Audio Adjustments.
There are only two adjustment
pots on the COR-5 Controller Board:
repeat audio pot R10 and tone level
pot R20. The repeater has been
designed to minimize the number of
adjustments, and all audio
adjustments are done simply with the
mic gain and deviation limiter controls
on the exciter and the two pots on the
controller.
a. Use a service monitor or some
other method of monitoring
transmitter deviation.
b. Set repeat audio pot R10 on the
controller fully clockwise, and set mic
gain pot in exciter fully clockwise.
With loud modulation on the receiver,
adjust the deviation limiter pot in the
exciter for hard limiting at about 5.5
kHz deviation. The result of this
procedure is to set up the deviation
limiter so that it doesn't limit on
normal receiver audio but it will limit
if telephone audio exceeds 5 kHz
deviation.
c. Activate the autopatch. Adjust
the mic gain pot in the exciter for full
deviation with dial tone audio. Then,
call someone and have the person
speak first softly and then very loudly
into the telephone. The deviation
limiter should clip the audio at not
much more than 5 kHz deviation with
the loud audio, and the soft audio
should be easy to hear. If necessary,
turn up the mic gain pot to make the
telephone audio louder, but check
again to be sure the limiter clips the
audio at about 5.5 kHz deviation with
dial tone or very loud audio from the
phone line. Turn off autopatch.
d. Apply a signal to the receiver
with 1000 Hz tone at 3 kHz deviation,
and adjust repeat audio pot R10 on
the controller for 3 kHz deviation on
the transmitter. This establishes the
repeat audio level relative to the
settings already done for the
autopatch.
e. Set the deviation of the cwid
and courtesy beep tones to 3 kHz, or
whatever level you prefer, by setting
tone level pot R20 on the controller.
The Test Tone 1000 Hz touch tone
command is handy for this operation;
it provides a ten second tone for
alignment purposes.
f. This completes the adjustments.
If any future changes are made, re-
member that the deviation limiter pot
in the exciter is set to limit loud audio
from the autopatch, the mic gain pot
in the exciter is used to set the
autopatch gain, and the repeat audio
and tone level pots on the controller
are used to set normal repeat audio
levels. Any change to the pots in the
exciter require that the pots on the
controller be reset afterwards.
FCC INFORMATION.
This device has also been granted
a registration number by the Federal
Communications Commission, under
part 68 rules and regulations for
direct connection to the telephone
lines. In order to comply with these
FCC rules, the following instructions
must be carefully read and applicable
portions followed completely.
1. This equipment complies with
part 68 of the FCC rules. A label is
provided on the rear of the repeater
chassis. This label contains the FCC
registration number and ringer
equivalence number (REN). If
requested, this information must be
provided to telephone company.
2. The ringer equivalence code
(REN) is used to determine the
quantity of devices which may be
connected to the telephone line may
result in the device not ringing in
response to an incoming call. In
most, but not all areas, the sum of the
REN's should not exceed five (5.0). To
be certain of the number of devices
that may be connected to the line, as
determined by the total REN's, contact
the telephone company to determine
the maximum REN for the calling
area.
3. If this equipment, causes harm
to the telephone network, the
telephone company will notify you in
advance. Also, you will be advised of
your right to file a complaint with the
FCC if you believe it is necessary.
4. The telephone company may
make changes in its facilities, equip-
ment, operations, or procedures that
could affect the operation of the
equipment. If this happens, the
telephone company will provide
advance notice in order for you to
make the necessary modifications in
order to maintain uninterrupted
service.
5. If trouble is experienced with
the telephone interface circuits, it
must be repaired promptly. If the
trouble is causing harm to the
telephone network, the telephone
company may request you remove the
equipment from the network until the
problem is resolved. If any questions
on how to repair the module, please
consult factory for any additional
troubleshooting information you may
need or to make arrangements for fac-
tory service .
6. This equipment must not be
used on telephone company provided
public coin service. Connection to
party lines is subject to state tariffs;
contact your state public utility
commission for information.
OPERATION.
GENERAL.
Operation of the REP-200 Repeater
is fairly typical of what you would ex-
pect. However, because of the
number of control functions, there is a
considerable amount of material to be
read in order to understand the whole
system. In order to make it easier to
visualize what is involved and to find
information later for reference,
information is presented in small
sections in the order in which you
would be likely to need it. First,
simple repeat operation is explained,
followed by how to perform touch tone
commands, autopatch operation, and
finally, descriptions of each of the
other operating functions available to
the owner.
If you have any difficulty, please
re-read the section(s) which describe
the mode of operation involved. There
may be things about using that mode
which you don't fully understand yet.
