Noise Suppression - GME TX3120S Instruction Manual

connect the radio's negative (black) lead to the
vehicle's chassis, or if preferred, directly to the
battery's negative terminal. the radio's positive
(red) lead should connect to an accessory point
in the vehicle's fuse box via the 2 amp fuse. this
point should supply +13.8 volts only when the
ignition switch is turned on or in the AccEssory
position via the 2 amp fuse.

nOISe SUPPreSSIOn

the inherent design of Fm transceivers results in
a high level of resistance to ignition and electrical
interference. however in some installations it
may be necessary to take additional steps to help
reduce or eliminate noise interference.
During installation, try to route the Dc battery
leads, the antenna lead or any accessory wires
away from the engine compartment, ignition or
alternator wiring. If the noise continues, it may
be necessary to fit a suppression kit in which case
we recommend you consult an auto electrician for
advice specific to your installation.
higher frequency electrical interference caused by
electric motors can be suppressed directly at the
motor terminals.
PA G E 3 2
High Voltage Detection
the radio has a built-in, high voltage detection
system to warn you if an overvoltage situation
occurs. If the overvoltage warning appears you
should switch your radio oFF and disconnect it
from the power source, before locating the cause
of the trouble.
If the power supply voltage exceeds 18 volts Dc,
the backlight will flash, an alarm melody will be
heard and 'hI_Dc' will be displayed. If the radio
remains connected, it will recheck the supply
voltage at regular intervals and repeat the alarm
sequence while the excessive voltage remains or
until the radio is disconnected from the power
source.
If the voltage level returns to normal while the
radio is connected, the alarm sequence will be
cancelled and the radio will return to normal
operation.
NOTE:
30 volts.
I n s t r u c t I o n m A n u A l
the power source should never exceed
t X 3 1 2 0 s