20 MDS 4790/9790 Series I/O Guide MDS 05-3438A01, Rev. F
Invisible place holder
Figure 16. Antenna Connection with External Cavity Filter
Application #4—
External Duplexer
and/or Cavity Filter
on units shipped
prior to June 1, 2000.
On units shipped prior to June 1, 2000, a maximum of two coaxial con-
nectors are included on the rear panel. If only one connector is present,
it connects directly to the antenna as shown in Figure 14 on Page 19.
If the radio is equipped for use with an external duplexer, a second con-
nector is included (Figure 17). In this case, the right connector acts as
the transmit output (to the duplexer), and the left connector acts as the
receive input (from the duplexer).
Figure 18 on Page 21 shows the required cable connections between the
radio and an external duplexer (and cavity filter, if required).
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Figure 17. Coaxial Connectors for Older Radios
(For units intended to operate with an external duplexer)
RX
Master Station
TX
Cavity Filter
IN OUT
ANT
OPTIONAL POWER SUPPLY
(Redundant Models)
ADDITIONAL HEATSINK
(Redundant Models)
RADIO A
RADIO B
RX in (from Duplexer) TX out (to Duplexer)
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