MDS 05-3438A01, Rev. F MDS 4790/9790 Series I/O Guide 19
Invisible place holder
Figure 14. Antenna Connection with Internal Duplexer
(Most common arrangement)
Application #2—
External Duplexer
This arrangement is used in systems where the duplexer is mounted
externally to the radio. The radio’s
TX and RX ports are the only connec-
tors present, and they connect to the duplexer as shown in Figure 15.
Contact the factory for duplexer ordering information.
Invisible place holder
Figure 15. Antenna Connection with External Duplexer
Application #3—
External Cavity Filter
In some areas, interference from strong signals such as paging transmit-
ters might require using a cavity filter. A cavity filter is an exter-
nally-mounted device tuned to the frequency of an interfering signal. It
removes or greatly attenuates the unwanted signal before it is detected
by the master station receiver. Contact the factory for filter ordering
information.
Because the cavity filter must be installed inline between the master sta-
tion receiver and the station antenna, the cabling arrangement in
Figure 16 on Page 20 is required.
ANT
Master Station
RX
Master Station
TX
Ext. Duplexer
RX TX
ANT
To Next Page
Loading...
Need help?
General
