User Manual

Optimization Overview – continued
July 1999
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SC 4812ET BTS Optimization/ATP – CDMA LMF
PRELIMINARY 2
Xircom Model PE3–10B2 or equivalent can also be used to
interface the LMF Ethernet connection to the frame.
NOTE
RS–232 to GPIB Interface
 National Instruments GPIB–232–CT with Motorola CGDSEDN04X
RS232 serial null modem cable or equivalent; used to interface the
LMF to the test equipment.
 Standard RS–232 cable can be used with the following modifications:
– This solution passes only the 3 minimum electrical connections
between the LMF and the GPIB interface. The control signals are
jumpered as enabled on both ends of the RS–232 cable (9–pin D).
TX and RX signals are crossed as Null Modem effect. Pin 5 is the
ground reference.
– Short pins 7 and 8 together, and short pins 1, 4, and 6 together on
each connector.
5
3
2
7
8
1
4
6
5
2
3
7
8
1
4
6
GND
RX
TX
RTS
CTS
RSD/DCD
DTR
DSR
GND
TX
RX
RTS
CTS
RSD/DCD
DTR
DSR
ON BOTH CONNECTORS:
 SHORT PINS 7 & 8;
 SHORT PINS 1, 4, & 6
9–PIN D–FEMALE 9–PIN D–FEMALE
Model SLN2006A MMI Interface Kit
 Motorola Model TRN9666A null modem board. Connectors on
opposite sides of the board must be used as this performs a null
modem transformation between cables. This board can used for
10–pin to 8–pin, 25–pin to 25–pin and 10–pin to 10–pin conversions.
 Motorola 30–09786R01 MMI cable or equivalent ; used to interface
the LMF serial port connection to GLI2, CSM and LPA debug serial
ports.
Communications System Analyzer
The communication system analyzer is used during optimization and
testing of the RF communications portion of BTS equipment and
provides the following functions:
(1) Frequency counter
(2) RF power meter (average and code domain)
(3) RF Signal Generator (capable of CDMA modulation)
(4) Spectrum Analyzer
(5) CDMA Code Domain analyzer
Four types of Communication System Analyzer are currently supported
by the LMF. They are:
HP8921A/600 Analyzer – Including 83203B CDMA Interface and
83236A/B PCS Interface with manual control system card.
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