18
Miscellaneous Tips
For optimal operation with external
•
antennas, low loss RF shielded cable
should be used and the length of the
cable should not exceed 10 ft. (3 m).
The receiver antennas should be kept
•
away from any metal surfaces whenever
possible as they can reflect away or
shield the incoming RF signal.
If the receiver’s volume control is set
•
too high, it may overdrive the input
of the attached audio mixer, causing
distortion. Conversely, if the output is set
too low, the overall signal-to-noise ratio
of the system may be reduced, causing
noticeable hiss. If such noise occurs,
adjust the output level of the receiver
so that highest sound pressure level
going into the microphone transmitter
causes no input overload in the mixer, but
permits the mixer level control to operate
in the normal range (not too high and
not too low). This provides the optimum
signal-to-noise for the entire system.
Before inserting the batteries, ensure that
•
they are inserted with the correct polarity.
Before operation, confirm that the
•
receiver and associated transmitter are
tuned to the same frequency group and
channel number.
After making a receiver channel change,
•
ensure that the corresponding change is
also made on the matching transmitter.
Use only brand new alkaline batteries.
•
Do not use “general purpose” carbon
batteries. When batteries are weak,
replace all the batteries at the same time.
Do not mix new and old batteries.
Position the receiver so that it has the least
•
possible obstructions between it and the
transmitter. Line-of-sight is best!
During operation, the transmitter and the
•
receiver should be as close as possible for
optimum results but never closer than 3 ft.
(1 m) as that may overload the receiver’s
input circuitry and cause noises.
For the best operation, the receiver should
•
be placed at least 3 ft. (1 m) above the
ground and 3 ft. (1 m) away from a wall or
metal surface. The transmitter should also
be at least 3 ft. (1 m) from the receiver.
Keep antennas away from noise sources
such as motors, automobiles, neon lights,
signal processors, computers, as well as
large metal objects.
A receiver cannot receive signals from
•
two or more transmitters simultaneously.
Turn the transmitter off when it is not
•
in use. For longest life, remove the
batteries if the unit is not to be used for
a long period as the transmitters draw
a tiny residual current to maintain the
programmed settings, even when turned
off. Also, since batteries installed for a
long time can sometimes corrode and/or
leak, causing damage, it is generally
recommended that batteries be removed
whenever the transmitters are not
being used.
When using the BT-1KU bodypack for
•
instrument use: Scratchy noises can
sometimes occur when an electric guitar
with dirty pots or connections is used with
a wireless system. Therefore, the supplied
capacitor provides first-order filtering of
the RF signal from the cord into the guitar
and eliminates virtually all scratchy noises.
Should your equipment still produce
scratchy noise, we suggest these steps
to eliminate problems:
1) Make sure all guitar volume and tone
pots are clean and all contacts are solid.
This is very important.
2) Solder a 47pF capacitor across the pot
to ground terminal of the guitar’s volume
and tone pots to provide extra filtering.
