Service Manual

GSM-204-323
TDF
31st Oct 01
Tech. 5–38
Technical Description: Horizon macro outdoor
CONTROLLED INTRODUCTION
68P02902W02-A
TDF
Overview of
TDF
The purpose of the twin duplexed filter (TDF) Tx block is to enable each
antenna to serve one CTU for both Tx and Rx.
The TDF has two identical sections, each providing a single path from a CTU to
a separate antenna. There is no combining in the TDF.
The TDF is located in the basket above the CTUs and is attached to the top
surface of the top panel using two M6 screws.
TDF view
Figure 5-23 shows the TDF Tx block with connectors identified.
HOLES FOR TOP PANEL
BASKET ATTACHMENT
7/16 CONNECTORS
TO ANTENNAS
TWO SMA Tx
CONNECTORS BENEATH
TDF (FROM CTU)
N-TYPE
CONNECTORS
TO SURF
Figure 5-23 View of TDF Tx block with connectors identified