Harris Aurora 5800 Troubleshooting Manual

Troubleshooting Guide

Issue 1, December 1999
IMN-201627-E01

When the radio hop is operating normally:

• The PWR lamp (green LED) is lighted.

• The TX ALM and RX ALM lamps (red LEDs) are extinguished (not lighted).

• The RSSI test jack voltage level (measured with a Voltmeter) is between 0 and 4.8 Vdc.

• A T1 (or E1) loopback test indicates no errors.

Trouble Symptoms and Suggested Corrective Actions

No.

1 No communication link

2 No communication link

3 The TX ALM lamp (red

4 The RX ALM lamp (red

5 LOS Alarm 1) Loss of signal (LOS) means the DS1/E1 signal is missing at the

TROUBLE

SYMPTOM

between two Aurora
radios in the hop and
the PWR lamp (green
LED) is OFF.

between two radios in
the hop and the PWR
LED is lighted.

LED) is lighted.

LED) is lighted.

CORRECTIVE ACTION

1) Make sure the power switches on the radios at both ends of the
hop are turned ON.

2) Check the connections to the power source.

3) Check the power source itself for availability of power.

1) Make sure far-end radio is turned ON.

2) Check the RSSI voltage level.

3) Check all cables for proper and secure connections.

4) Check the antennas for proper “line-of-sight” alignment.

1) The transmit output power level may be too low (3 dB lower than
nominal).

1) Check the RSSI voltage level.

2) Check the antennas for proper alignment.

3) Check the transmit output power at the distant end; the power to
the Rx end is too low.

input of the modem board.

Microwave Communications Division - ISO 9001 Certified

(continued on other side)

6 BER is high; too many

Copyright © 1999 Harris Corporation

errors.

1) Check and make sure that the Transmitter Spread Sequence at
the far end matches the Receiver Spread Sequence at the near
end of the hop.

2) Rotate the polarization of the antenna at both ends of the link by
90 degrees.

3) If still no improvement is achieved after step 2), use the Aurora
5800 utility software and change the transmit and receive spread
sequence numbers.

For detailed troubleshooting information, refer to Chapter 7 in the Aurora Reference Manual.

www.microwave.harris.com/cservice/

USA 1-800-227-8332 Int’l ([phone]

Harris Corporation 350 Twin Dolphin Drive Redwood Shores, CA USA 94065