Adtran TRC582TR1 사용자 설명서
TRACER 2xT1 User’s Manual
61280003L2-1B
Section 2 Installation
22
Preliminary
RF LOW
The “RF Low” LED indicates that the received signal is within 10dB of the minimum received signal
strength (~-80 dBm). If this indicator is on, the link performance may be marginal. The antennas should
be peaked in azimuth and elevation until the desired signal level is achieved. RSSI may be monitored on
either the RF unit or the front of the BBP. If the received signal is too strong and RSSI reaches a
maximum such that the peak cannot be discerned, then the transmitter on the far end should be turned
down.
strength (~-80 dBm). If this indicator is on, the link performance may be marginal. The antennas should
be peaked in azimuth and elevation until the desired signal level is achieved. RSSI may be monitored on
either the RF unit or the front of the BBP. If the received signal is too strong and RSSI reaches a
maximum such that the peak cannot be discerned, then the transmitter on the far end should be turned
down.
At this point the radio link should be operational. Proper operation can be determined by the status of
the “LINK DOWN” LED. If this LED is
the “LINK DOWN” LED. If this LED is
on
, the link
is not
operational. If this LED is not on, the
link is operating. Certain types of interference can cause one end of a path to operate and the other end
to fail. In some instances, this may be corrected by swapping the frequency plan at each end, thus
avoiding the interference if it is stronger at one end than the other. Changing the spreading code at each
end may also allow interference to be mitigated.
to fail. In some instances, this may be corrected by swapping the frequency plan at each end, thus
avoiding the interference if it is stronger at one end than the other. Changing the spreading code at each
end may also allow interference to be mitigated.
REMOTE BERT
The TRACER includes a Bit Error Rate Tester (BERT) to verify that the installed system is operating
correctly. When the “Remote Test” button is pushed on the local BBP, the remote end will send a BERT
pattern for approximately 10 seconds. The “Remote TST” indicator will turn yellow and remain on for
the duration of the test. If no bit errors are detected, the “Remote TST” indicator will turn off. If any bit
errors are detected, the “Remote Fail” indicator will turn red. This test should be run after the radio link
has been aligned. If the test fails, refer to Section 4, “Troubleshooting,” for guidance.
correctly. When the “Remote Test” button is pushed on the local BBP, the remote end will send a BERT
pattern for approximately 10 seconds. The “Remote TST” indicator will turn yellow and remain on for
the duration of the test. If no bit errors are detected, the “Remote TST” indicator will turn off. If any bit
errors are detected, the “Remote Fail” indicator will turn red. This test should be run after the radio link
has been aligned. If the test fails, refer to Section 4, “Troubleshooting,” for guidance.
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.
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.