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61280004L2-1C
Section 1 TRACER Description
A block diagram of the BBP is shown in Figure 1-5.
RS-232
E1 A
E1 B
IF
21-56
VDC
VT100 RS-232 Interface
An RS-232 interface is provided via a 25-pin D connector for attaching a VT100 compatible terminal.
The active signals used on this interface are listed below
Signal Name Pin Number
Transmit Data .......... 2 ............. Terminal/Modem
Receive Data ............ 3 ............. TRACER
Request to Send ....... 4 ............. Terminal/Modem
Clear to Send ............ 5 ............. TRACER
Data Set Ready ........ 6 ............. TRACER
Signal Ground .......... 7
The management system allows the E1 interfaces to be provisioned. The line code can be selected as
AMI or HDB3. The signaling can be selected as channel associated signaling (CAS) or common channel
signaling (CCS). Alarm conditions can also be monitored. The management system will report the
following alarms on the E1 interfaces:
4
Baseband Processor Board
µC
UART
E1
Data
Multiplexer
E1
Fc = 140 MHz
Filter
Fc = 70 MHz
IF Interface Board
Figure 1-5. BBP Block Diagram
Source
DSP
Spread
Viterbi
Spectrum
Encoder/
Data
Decoder
Pump
Σ
90
90
TRACER 2 x E1 User's Manual
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