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Frequency Selection (169.445 - 171.905 MHz)
The M-169 transmitter can operate on eight FCC dedicated assigned
channelsfor wireless microphoneoperationunder FCC RegulationPart90.
These channels may be used in two groups of four channels for
multi-channel operation. (Refer to frequency charts on page 9.)
After you have determined the channel on which
you are going to operate, position the two rotary
switches to indicate the channel and the mode of
operation. The left rotary switch determines
mode of operation. Position “1” is for
COMTEK companded receivers. Position
“0” is for non-companded receivers of
different manufacturesother than COMTEK.
The right rotary switch selects the frequency by
channel number (1-8). (Refer to frequency chart on page 9.)
Multiple Channel Operation
When multiple transmitters are broadcasting in the same immediatearea
(within 100 feet), the RF signals will “mix” together generating additional
signals. Ifthese product frequenciesare too closeto a frequencywhich you are
using,you will experience intermodulationinterference. This condition is
commontoallradioreceiverstosomeextent.
Simultaneous operation of more than three channels requires frequency
coordination to avoid intermodulation interference which could result in
poor or unusable performance.
To avoid this type of interference,you should select frequencies from one
of the standard groups (see group frequency charts on page 9), or use COMTEK’s
frequency selection software available at www.comtek.com to determine appropriate
frequencies or contact COMTEK to obtain a free copy.
M-169 FREQUENCY SELECTION
