12
MISCELLANEOUS USEFUL TIPS
• 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 optimal signal-to-noise for the entire system.
• Before inserting the batteries, ensure that they are being inserted with the correct
polarity.
• Before operation, confirm that the receiver and associated transmitter are tuned to
the same frequency group and channel number.
• Use only new AA alkaline or fully recharged NiMH 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 to
each other for optimum results but never closer than 3 ft. (1 m) as that may overload
the receiver’s input circuitry and cause feedback and interference.
• If rackmounting the receiver, keep away from heat sources such as amplifiers by
allowing enough space between them for adequate ventilation. Also, position the
receiver in the rack so the antennas can be optimally adjusted as described above.
• 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 and 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.
