GE MDS 4790 Series Installation & Operation Manual page 28

Application #4—
External Duplexer
and/or Cavity Filter
on units shipped
prior to June 1, 2000.
OPTIONAL POWER SUPPLY
20
RSPSupply - 1-888-532-2706 - www.RSPSupply.com
http://www.RSPSupply.com/p-8457-MDS-UP-9790X.aspx
Figure 16. Antenna Connection with External Cavity Filter
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
If the radio is equipped for use with an external duplexer, a second con-
nector is included (Figure
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).
This view applies only to units shipped prior to June 1, 2000
(Redundant Models)
RX in (from Duplexer)
Figure 17. Coaxial Connectors for Older Radios
(For units intended to operate with an external duplexer)
MDS 4790/9790 Series I/O Guide
Invisible place holder
Cavity Filter
IN OUT
RX TX
ANT
Master Station
Figure 14 on Page
17). In this case, the right connector acts as
Invisible place holder
ADDITIONAL HEATSINK
(Redundant Models)
TX out (to Duplexer)
MDS 05-3438A01, Rev. F
19.
RADIO A
RADIO B