User's Manual

Board and Unit Descriptions
Cabling between boards and units is found on page 5-26.
DC - Directional Coupler
The directional couplers on the BS and MS sides are identical.
Connection
To the left in the cabinet DC/MS:
Port Connected to
DPX ANT on the DPX/MS duplex filter.
TEST –30dB Test port for the downlink output signal. This port has
no directivity.
MS –20dB Not used.
ANT MS antenna.
To the right in the cabinet DC/BS:
Port Connected to
DPX ANT on the DPX/BS duplex filter.
TEST –30dB Test port for the uplink output signal. This port has no
directivity.
MS –20dB Mobile station antenna connection for remote control.
This port has at least 20dB directivity towards the
antenna.
ANT BS antenna.
MS
DPX
ANT
TEST
DC
-30 dB
-20 dB
Figure 5-8. DC Directional coupler
ALLGON System AB AR Repeaters & OMT32 Hardware – Functional Description
User’s Manual VD202 90/EN Rev. 1A 1999-07 5 - 16