User Manual

Test Equipment Set–up – continued
PRELIMINARY 2
SC 4812ET BTS Optimization/ATP – CDMA LMF
July 1999
3-48
RF OUT
ONLY
Hewlett–Packard Model HP 8921A
W/PCS Interface
HP PCS
INTERFACE
GPIB
CONNECTS
TO BACK OF
UNITS
SYNC MONITOR
EVEN SEC TICK
PULSE REFERENCE
FROM CSM BOARD
FREQ MONITOR
19.6608 MHZ CLOCK
REFERENCE FROM
CSM BOARD
TEST SETS Optimization/ATP SET UP
RX ANTENNA
PORT OR RFDS
RX ANTENNA
DIRECTIONAL
COUPLER
TX ANTENNA
PORT OR RFDS
RX ANTENNA
DIRECTIONAL
COUPLER
RS232–GPIB
INTERFACE BOX
INTERNAL PCMCIA
ETHERNET CARD
GPIB
CABLE
UNIVERSAL TWISTED
PAIR (UTP) CABLE
(RJ45 CONNECTORS)
RS232 NULL
MODEM
CABLE
S MODE
DATA FORMAT
BAUD RATE
GPIB ADRS G MODE
ON
BTS
TX
TEST
CABLE
CDMA
LMF
DIP SWITCH SETTINGS
10BASET/
10BASE2
CONVERTER
LAN
B
LAN
A
RX
TEST
CABLE
COMMUNICATIONS TEST SET
IEEE 488
GPIB BUS
IN
TEST SET
INPUT/
OUTPUT
PORTS
OUT
NOTE: IF BTS RX/TX SIGNALS ARE
DUPLEXED: BOTH THE TX AND RX TEST
CABLES CONNECT TO THE DUPLEXED
ANTENNA GROUP.
100–WATT (MIN)
NON–RADIATING
RF LOAD
2O DB PAD
30 DB
DIRECTIONAL
COUPLER WITH
UNUSED PORT
TERMINATED
EVEN
SECOND/
SYNC IN
CDMA
TIMEBASE
IN
FREQ
MONITOR
SYNC
MONITOR
CSM
RF
IN/OUT
Figure 3-19: Optimization/ATP test setup HP 8921A W/PCS
FW00097
3