User Manual

Wireless Innovations Group
2601 Telecom Parkway
Richardson, Texas 75082
400/800 MHz Fiber Optic & RF Fed Bi-Directional
Amplifier Operations / Maintenance Manual
DWG NO:
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Date
:06/16/2004
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2 Plug the BDA into a 120 VAC single phase three wire grounded receptacle (5-15R).
3 Connect the RF antenna cable to the antenna port (Type-N Female) on the rear panel of
the BDA. If a RF fed BDA was installed, connect the base station RF cable to the base
station port (Type-N Female) on the rear panel of the BDA.
4 If a fiber fed BDA was installed, connect the fiber optic cable to the BDA front panel
FC/APC connectors. If both fiber connection indicators (i.e. LEDs) are illuminating a
green color, the connection between the optical source and the BDA was successful.
DOWNLINK GAIN SETUP
The fiber fed BDA provides 18 dB of gain for 9 dB of optical loss. The factory gain
setting for the fiber fed BDA is 48 dB, with a maximum FCC RF output limit of +30
dBm. Due to the various fiber optic link losses found in a communication system, the
fiber optic gain must be adjusted so not to exceed the BDA FCC power limit. The
equipment needed and the gain test setup required for this adjustment is shown in Figure
6.1 below.
Figure 6.1 Downlink Gain Test Configuration
1 Using the signal generator, inject a –18 dBm signal into the downlink operating passband
of the fiber fed BDA.
2 Measure the output signal level of the fiber fed BDA using the spectrum analyzer.
3 If the measured output signal level exceeds +30 dBm, reduce the fiber optic gain (i.e.
adjust BDA’s fiber optic transceiver front panel potentiometer) so that the output power
level is equal to +30 dBm.
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.
Signal
Generator
Fiber Optic
Transceiver
Chassis
Fiber Fed
BDA
Spectrum
Analyzer
-18 dBm
RF Cable Fiber Cable RF Cable
+30 dBm