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NOTE: No additional fiber gain adjustment will be required after the fiber optic gain has
been set. If any additional gain adjustments are required they must be performed via the
RS232 port.
The RF fed BDA uplink gain setting was performed at the factory and no field adjustments are
required. For a 48 dB gain setting, the maximum input signal level is – 14 dBm with ALC
active and – 43 dBm without ALC active. Note, the ALC is activated at the factory and when
the input level exceeds – 43 dBm, the ALC will go into operation.
7.
BDA MAINTENANCE / TROUBLESHOOTING & MODULE CARE
7.1 Maintenance
The BDA does not require any routine or preventative maintenance once in operation.
7.2 BDA Troubleshooting Procedure
FAULT
No Downlink Signal
No Uplink Signal
Low FF BDA Downlink Gain
(Gain Set: 48 dB)
Low RF BDA Downlink Gain
(Gain Set: 48 dB)
Low FF BDA Uplink Gain
(Gain Set: 48 dB)
Low RF BDA Uplink Gain
(Gain Set: 48 dB)
DWG NO: AE04B-A1669
Troubleshooting Procedure
-Verify BDA power is switched "ON".
-Check fiber fed BDA cable connections.
-Check RF fed BDA cable connections.
-Verify fiber fed BDA Rx fiber port LED is green.
-Check Radio Transmitter at base station.
-Verify BDA power is switched "ON".
-Check fiber fed BDA cable connections.
-Check RF fed BDA cable connections.
-Check fiber optic connection at base station Fiber Optic
Transceiver Chassis.
-Check for output signal at Fiber Optic Transceiver
Chassis located at the base station.
-Using a Signal Generator, inject a –18 dBm signal at base
fiber optic transceiver and measure output power level of
BDA with Spectrum Analyzer (+30 dBm).
-Using a Signal Generator, inject a – 18 dBm signal in the
base station port of the BDA and measure the output
power level of BDA with Spectrum Analyzer (+30 dBm).
-Using a Signal Generator, inject a – 43 dBm signal at the
BDA antenna port and measure the output power level at
the Fiber Optic Transciever Chassis at the base station port
using the Spectrum Analyzer (- 4 dBm).
-Using a Signal Generator, inject a – 43 dBm signal at the
BDA antenna port and measure the output power level at
the BDA base station port using the Spectrum Analyzer
(+ 5 dBm).
400/800 MHz Fiber Optic & RF Fed Bi-Directional
Wireless Innovations Group
2601 Telecom Parkway
Richardson, Texas 75082
Rev: B
Amplifier Operations / Maintenance Manual
Date: 06/18/2008
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