TechnicalInformation
Wireless Basics
Everywireless microphone systemhas tooperateon one specific frequency
Transmitter and receiver ofa system need to workonthe same frequency
Two transmitters cannot beused with onereceiver at the same time
Receiver/Antenna Placement
Directline of sightbetweentransmitter and receiver antenna
Place the receiver/antennas atleast5 ft. (1.5 m) away fromall transmitters
Place the receiver antennas at least5ft. (1.5 m) away from any big metal object,
wire(particularly wire mesh) orsheet metalstructures, walls,ceilings, etc.
Donot placetheantennasinhidden places (behind walls)
Place the receiver at least 5ft. (1.5 m) awayfrom any equipmentthat may emitRF
radiation such as lightingracks, fluorescentlamps, digital effect units, orPCs
Squelch
Standard: Carrier squelch, manual
– Operates strictlyonthe signal strengthof the signal.
– If received signal strengthdrops under the adjustablesquelch threshold the
audio output ismuted
Advanced: ToneCode (only WMS4000)
– The audio turnson onlyinthepresenceof the correct tonecode and an
adequate signal strength (-100dbm)
–Lock out all signals except ones withthecorrectkey.
Intermodulation
Intermodulationis the result of two or moresignalsofdifferent frequencies being
mixed together, forming additionalsignalsthat arenot harmonic frequenciesof
either.
Byusing morethanone transmitter simultaneously at the same location,intermodulation
happens in thereceiverand/or transmitter. In your case thisintermodulationproducts
aregenerated inthe bandwidththatyouareusing.
Toavoid intermodulating frequencies,we offer you pre-calculated frequenciesaspresets in
the SR450 and SR4000Receiver. Please, makesure that when setting up a multi channel
system, all your receivers are set to the same countrypreset (NAME)and group.Use the
Automaticchannelfunction(autosetup) to scan for free frequencies at your venue.
Wolfgang Fritz/ Feb. 2008
MCS0802001
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