Comtek Communications Technology Inc BST75-216 Manual De Usuario
Page 9
Multiple Channel Operation
When multiple transmitters (more than two) are used in the same
proximity, intermodulation interference can occur. This condition
is common to all radio receivers to some extent when multiple
transmitters are used in the same operating area. The RF signals will
“MIX” together generating additional signals. If these product
frequencies are too close to a frequency which the receiver can also
respond to, you will experience intermodulation interference which
may cause undesirable operation.
proximity, intermodulation interference can occur. This condition
is common to all radio receivers to some extent when multiple
transmitters are used in the same operating area. The RF signals will
“MIX” together generating additional signals. If these product
frequencies are too close to a frequency which the receiver can also
respond to, you will experience intermodulation interference which
may cause undesirable operation.
To avoid this type of interference when multiple transmitters are used
in the same proximity, transmitting frequencies must be coordinated
by selecting from frequencies in the same group.
(See group frequency chart on page 8.)
in the same proximity, transmitting frequencies must be coordinated
by selecting from frequencies in the same group.
(See group frequency chart on page 8.)
Transmitter Proximities For
Multiple Channel
Operation
Multiple Channel
Operation
Frequency groups being
transmitted should be
separated by 2X the
operating area; and for
best performance, the
group operating areas
should have a 100 ft.
minimum separation.
transmitted should be
separated by 2X the
operating area; and for
best performance, the
group operating areas
should have a 100 ft.
minimum separation.
Free Frequency Coordination Software
Frequency coordination and after-sale programming for different
compatible frequency groups can be done through COMTEK’s
Technical Support Services. Frequency selection software may be
downloaded from COMTEK’s website at www.comtek/support.html
compatible frequency groups can be done through COMTEK’s
Technical Support Services. Frequency selection software may be
downloaded from COMTEK’s website at www.comtek/support.html
BST 75-216 FREQUENCY INFORMATION
transmitters
transmitters
Group 1
operating area
Group 2
operating area
Transmitter
separation