Setup: Receiver Antennas
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Determine area of operation of transmitters.
Determine receiver antenna locations for best line-ofsight to transmitters.
Locate receiver antennas no closer than 15 feet to
nearest transmitter.
Elevate receiver antennas well above the audience or
other obstructions.
Locate diversity antennas at least two feet apart
Keep antennas at least one foot away from other metal
objects.
Keep antennas at least two feet away from RF noise
sources such as digital audio processors, video devices,
CD/DVD players, computers, etc.
Setup: Receivers
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Programming receivers:
Within a given band, ALL systems should be set
to the same Group and different CHANNELS
within that Group. DO NOT MIX GROUPS!
DO NOT USE LETTER GROUPS: A1-A9,
B1-B4 unless specifically instructed
Set output mic/line switches as necessary.
Set front panel output level controls fully
clockwise
Setup: Transmitters
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Program transmitters to match receiver Group
and Channel set.
Set transmitter audio levels
Bodypack transmitter: set input attenuation
accordingly for lavalier microphone, headworn
microphone.
Handheld transmitter and bodypack transmitter:
adjust gain control in battery compartment so
that red LED peak light on receiver just flashes
on LOUDEST sound
Pre-show Checkout
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Verify good batteries in each transmitter
Turn OFF all transmitters
Turn ON all receivers
Observe RF signal LED strings on receivers:
0-2 LEDs on either side: channel is OK
3 or more LEDs on either side: channel has
excessive interference. Change to another
compatible channel
Turn on each transmitter ONE at a time to
verify signal at corresponding receiver
Turn on all transmitters to verify signals at all
receivers
Pre-show Checkout
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Conduct a walk around test for each transmitter
throughout the performance area
If locations of low RF are found, reposition
receiver antennas to compensate if possible.
If set pieces or other fixed obstructions are
problematic, the allowable performance area
may have to be modified.
Show Operation:
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Turn on required receivers.
Mute or turn off unused receivers
Turn on required transmitters. Transmitters must be at
least 15 feet from nearest receiver antenna.
Verify reception at receivers
Place transmitters with participants
Attach to participant as high on the body as possible:
breast pocket of jacket, belt, etc.
Do not fold or shorten bodypack antenna
Position lapel microphone as close as possible to
mouth: knot of tie, collar, lapel, etc.
Aim directional microphones toward mouth
Show Operation:
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Position omnidirectional head-worn microphone
at corner of mouth
Position unidirectional head-worn microphone
slightly forward and to the side of mouth
Power lock transmitter if desired (press and hold
“Mode” and “Set” buttons together).
Monitor RF levels during show on the receivers
front panels
Monitor audio directly on headphone outputs
on receiver front panels
General tips:
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TURN OFF ALL mobile phones, Blackberrys,
Trios, etc.) in the performance area
In particular… participants. Units must be
COMPLETELY OFF, not just on silent.
Do not cue up un-occupied receivers in the
sound system. Receivers without active
transmitters should be muted or turned off.
Do not set up system with some transmitters
very close to receiver antennas and other
transmitters far away. The nearby transmitters
can desensitize ALL receivers.
General tips:
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In the UHF range, line-of-sight is critical: elevate
receiver antennas as high as necessary to “see”
the transmitters at all times.