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61280003L2-1B
Section 1 TRACER Description
VT-100 RS-232 Interface
A serial interface port using RS-232C signal levels is provided for attaching a VT-100-compatible
terminal. The connection is made via a DB-25 connector on the rear panel. The data rate is configured
for 9600 bps, 8 data bits, no parity, and 1 stop bit.
A 7-day error history of the T1 interfaces and radio link is also provided. Fifteen-minute histories are
provided for the most recent 24 hours of operation.
Alarm Contacts
Two sets of alarm contacts are provided on the rear of the BBP: major alarm and minor alarm. A major
alarm indicates the radio link is not operational. A minor alarm indicates that system performance is
degraded or that the T1 interfaces are experiencing errors. Normally-open and Normally-closed contacts
are provided for both alarm types. Under normal operating conditions there is no continuity between the
Normally-open and Common contacts, and, under an alarm condition, continuity between those contacts
exists. The Normally-closed and Common contacts normally have continuity, while under alarm
conditions, these contacts are open.
IF Signal
The N-type connector on the rear panel provides the interface point between the BBP and the RFC. This
connection provides the data signal, power, and configuration information to the RFC. A coaxial cable
(ADTRAN part number 3125RF027@A) is provided for connecting the BBP to the RFC for the
rackmount model. Cable for connecting the BBP to a mastmount RFC must be provided by the customer
after the length of cable has been determined.
Power
The unit receives power via one of two connectors. Power for the entire system is provided by these
interfaces. The three-pin circular DIN connector is provided to connect an optional ADTRAN desktop
AC adapter (ADTRAN part number 1360DSK24VL1), providing 24 volts DC. The three-pin terminal
block allows the connection of any DC power source providing between 21 and 60 volts DC. The power
consumption of the entire system is 30 watts.
Controls and Indicators
The system may be configured via the front panel, which is accessible behind a drop-down panel on the
right half of the BBP. The front panel is illustrated in Figures 1-6 and 1-7.
TEST
POWER
6
T1A
T1B
BPV
BPV
LBK
LBK
YEL/AIS
YEL/AIS
RED
RED
Figure 1-6. BBP Front Panel (with door closed)
Preliminary
FREQ
SYSTEM
PLAN A
RF LOW
PLAN B
LINK DOWN
TRACER 2xT1 User's Manual
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Troubleshooting
