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6.
INSTALLATION
6.1 BDA Installation & Gain Setup
INSTALLATION
1 Install the BDA in a standard 19" rack. The BDA should be placed in a location where
the interconnect cables (i.e. fiber, RF and serial cable) can be easily installed and not
susceptible to damage. If the BDA is not installed in a controlled environment, a 5U high
space should be located above and below the unit for airflow.
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.
RF Cable
Signal
Generator
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.
DWG NO: AE04B-A1669
Fiber Cable
Fiber Optic
Transceiver
Chassis
-18 dBm
Figure 6.1 Downlink Gain Test Configuration
Wireless Innovations Group
2601 Telecom Parkway
Richardson, Texas 75082
Fiber Fed
BDA
+30 dBm
400/800 MHz Fiber Optic & RF Fed Bi-Directional
Amplifier Operations / Maintenance Manual
Rev: B
Date: 06/18/2008
RF Cable
Spectrum
Analyzer
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