ADTRAN TRACER 2xT1, Руководство пользователя

Страница: 19 / 65

TRACER 2xT1 User’s Manual
61280003L2-1B
Section 1 TRACER Description
8 Preliminary
Tx PWR ........................ UP increments radio transmit power up.
DOWN increments radio transmit power down.
VT100 terminal will indicate Tx Power setting.
Remote Test ................. Initiate a remote test across the RF link
Non-volatile Memory
The TRACER system contains non-volatile memory to retain certain configuration settings. These
settings include:
Frequency plan
Chipping code (if set from VT-100)
Password
Password enabling
Site name
T1 line coding (if set from VT-100)
T1 framing (if set from VT-100)
Built-In Tests
The TRACER has several features to aid in site setup and later debugging. These diagnostics include T1
loopbacks and a link test with BERT (Bit Error Rate Test) data. A link test is performed by pressing the
test button. The remote unit will then send a pseudorandom data pattern and the local end will compute a
BER. After the conclusion of the test, the remote end will automatically be instructed to terminate the
pattern generation. If any bit errors are introduced, the Remote Test Fail LED will illuminate.
The monitor points provided on the front panel of the system are listed on the next page.
I ......................................Demodulated received baseband output
Q ....................................Demodulated received baseband output
CLK ............................... Recovered clock for observing EYE pattern
RSSI .............................. DC voltage indicating strength of the received signal at
the antenna
+5 ................................... System 5 volts
-5 ....................................System -5 volts
+12 ................................. 12 volts
-12 ................................. System -12 volts
RF PWR ........................ Voltage supplying RF power
GND .............................. System ground
Radio Frequency Converter or RFC
The radio frequency converter (RFC) provides the radio frequency (RF) interface between the baseband
processor and the antenna. The RFC is partitioned, functionally, into two major components - the
transmitter and the receiver.
The major connections illustrated in Figure 1-8 are transmit signal, receive signal, and the IF signal
connection.
The RFC unit is enclosed in a metal enclosure approximately 9.5 inches x 5.5 inches x 1 inch and is
mounted in a 1-U, 19-inch rackmountable housing or mastmountable, weatherproof enclosure.