User's Manual

Test Equipment Set–up – continued
May 2000
3-47
SC 4812T CDMA BTS Optimization/ATP
Figure 3-15: Typical TX ATP Setup with Directional Coupler (shown with and without RFDS)
30 DB
DIRECTIONAL
COUPLER
40W NON–RADIATING
RF LOAD
OUTPUT
PORT
RVS (REFLECTED)
PORT 50–OHM
TERMINATION
FWD
(INCIDENT)
PORT
BTS INPUT
PORT
TX TEST
CABLE
ONE 20 DB 20 W IN LINE
ATTENUATOR
Connect TX test cable between
the directional coupler input port
and the appropriate TX antenna
directional coupler connector.
TX ANTENNA DIRECTIONAL COUPLERS
RFDS RX (RFM TX) COUPLER
OUTPUTS TO RFDS FWD(BTS)
ASU2 (SHADED) CONNECTORS
RX
(RFM TX)
TX
(RFM RX)
COBRA RFDS Detail
1
2
3
RF FEED LINE TO
DIRECTIONAL
COUPLER
REMOVED
COMMUNICATIONS
TEST SET
IN
Appropriate test sets and the port
names for all model test sets are
described in Table 3-21.
TX
TEST
CABLE
TX RF FROM BTS FRAME
TEST
DIRECTIONAL
COUPLER
NOTE:
THIS SETUP APPLIES TO BOTH
STARTER AND EXPANSION FRAMES.
FW00116
3