Decade TRC-800 - SECTION 3: OPERATION; Controls and indicators; Input and output connectors; Optimal input level

A)
sEcTtoN 3
OPERATION
Controls
and
indicators
TRC-800
and
TRC-800S: Input
level
is
controled by a
stereo
(TRC-800S)
potentiometer,
labeled INPUT LEVEL
and
located
on the
front
panel.
One
led indicates
the
modulation level: OVER
(red),
wich lights up when
the
modulation
level is
equal or
greater
than
2OOo/o, wich indicates
an
overmodulation state
and
could
result in
distortion at the
receiving
end,
The
OVER
indicator should never
or
rarely light, in order
to
avoid
distortion.
To
allow a better
perception
of this
indicator, its holding
time
has been
lenghtened,
because of
its
importance.
The
TRC-800S
transmitter
can be
switched
from mono
to stereo
mode,
in
order to
let
you
use the best
mode
for
your particular
application.
The
stereo selector
is located
on the
front
panel.
When in
stereo
mode,
the
STEREO
indicator lights
up,
In
mono,
only the
RIGHT input
is active
(balanced
or unbalanced) and
the
LEFT input is ignored.
Input
and output connectors
TRC-800
and
TRC-800S
transmitters come with
two sets of
inputs:
RIGHT
and
LEFT XLR3
balanced inputs
and RIGHT and LEFT 114"
unbalanced
inputs, wich
are
the two
most
popular
types
of
input
connectors.
The
RF output has
a
female
UHF
(PL)
connector and typical load
impedance
is
50 Ohms.
Antenna
cable
(RG-8
or
RG-58)
should nor
exceed 200 feet in lenght f
or RG-8
and
100 feet
for RG-58, in
order to
minimise
the
power
loss in
the cable.
Optimal
input
level
Optimal
input level
is reached when
the OVER
modulation indicator
remains
off
most
of the time. Adjust
the
input level
control to
meet
that
condition,
R\
a\
A
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