Rotel RT-830 - Page 3

OUT DOOR AM ANTENNA
LOOP AM ANTENNA
EXCLUSIVE NOTES FOR THE U.S.A.
Outdoor Antenna Grounding
If an outside antenna is connected to the receiver/tuner, be sure the an-
tenna system is grounded so as to provide some protection against vol-
tage surges and built up static charges. Section 810 of the National
Electrical Code, ANSI/NFPA No. 70—1978, provides information with
respect to proper grounding of the mast and supporting structure,
grounding of the lead-in wire to an antenna discharge unit, size of
grounding conductors, location of antenna-discharge unit, connection
to grounding electrodes, and requirements for the grounding electrode.
See figure.
DOWNLEAD OR
_-LEAD.IN WIRE
(a, b)
GROUND .^
| CLAMP
MAST
GROUND
WIRE (a, b)
TO TUNER
GROUND
WIRE
INS ANTENNA
DISCHARGE
S UNIT (c)
GROUND
^ CLAMPS
a. Use No. 10 AWG copper or No. 8 AWG aluminum or No. 17 AWG
copper-clad steel or bronze wire, or larger as ground wires for both mast
and lead-in.
b.
Secure
lead-in
wire
from
antenna
to
antenna
discharge
unit
and
mast
ground
wire
to
house
with
stand-off
insulators,
spaced
from
4
feet
(1,22
meters)
to
6 feet
(1.83
meters)
apart.
c. Mount antenna discharge unit as closely as possible to where lead-
in enters house.
— SUITABLE GROUNDING
ELECTRODE DRIVEN
8' INTO THE EARTH
(244 METERS)
SWITCHES AND CONTROLS
(1) Power Button
position, interstation noise generated when
tuning in an FM station will be reduced.
(4) Signal Strength Indicator
The 5 LEDs show incoming signal strength;
the receiving condition is optimal when all
This button turns on the unit. The LED indi-
cator above it will glow when the power is on.
Press the button a second time to turn off the
power.
(2) Dial Scale
The dial pointer LED indicates tuning fre-
quency.
(3) Stereo Indicator
Glows when stereo broadcasting signal is tuned
in. Note that when stereo signal is very weak,
the unit will not give stereo reproduction, and
the indicator will not light up
5 LEDs are illuminated.
(5) AM/FM Selector
Push to either AM or FM position depending of
which broadcasting you wish to listen. (In case
of FM/MW/LW version model, push LW/MW
button to select either LW or MW broadcasting.)
(6) FM Mute Off/Mono Button
When this button is pressed to ON, any FM
broadcast is received monaurally. Be sure to
leave the button in the released (OFF) position
during normal stereo FM reception. In the OFF
ROTEL Avem STERFO TUNER AT-B30
"ou BOD ano
1009 WUD 400 600
(7) AM Filter Button
Push
this
button
in
to
activate
the
filter
to
cut
off
high
frequencies
in
case
of
background
noises
like
hiss
preventing
a
good
AM
reception.
(8) Tuning Knob
Used
to
tune
in
to
a
desired
station.
Rotate
the
knob
to
the
right
to
tune
for
higher
frequen-
cies,
and
to
the
left
for
lower
frequencies.
AM TUNING
BAND MOOR FILTER
FM sTEDFO ore a
000
MONO
AM (MUTE OFF ON æ