G Way Solutions PCS2W70A User Manual

INSTALLATION

AND

OPERATING MANUAL

FOR

BDA-1XXX-.X/.XW-XX-AX

MINI-BI-Directional Amplifier

TABLE OF CONTENTS

PARAGRAPH PAGE NO

Mini-BDA OVERVIEW 3
Mini-BDA BLOCK DIAGRAM DESCRIPTION 3

Mini-BDA OPTIONS 3

Mini-BDA BLOCK DIAGRAM DRAWING (Figure 1) 4
ELECTRICAL SPECIFICATIONS 5

FREQUENCY RANGES (Table 1) 6
SYSTEM SPECIFICATIONS (Table 2) 6

MECHANICAL CONNECTIONS 7

ENVIRONMENTAL CONDITIONS 7
Mini-BDA CONNECTIONS 7
MECHANICAL OUTLINE DRAWING (Figure 3 & 3a) 8

RF EXPOSURE WARNING 9

Mini-BDA INSTALLATION 10

Mini-BDA OPERATION 11

MECHANICAL OUTLINE- ADJUSTMENT (Figure 4) 12

DIAGNOSTICS GUIDE 13

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Mini-BDA OVERVIEW:

The Mini-BDA assembly extends the coverage area of radio communications in
buildings and RF shielded environments. The Mini-BDA has dual RF paths to extend
coverage in two distinct frequency bands.
The unit features low noise figure and wide dynamic range. It is based on a duplexed
path configuration with sharp out of band attenuation allowing improved isolation
between the receiving and transmitting paths.

Mini-BDA BLOCK DIAGRAM DESCRIPTION:

Refer to Figure 1 for the following discussion.

The Mini-BDA Downlink path receives RF signals from the base station and amplifies
and transmits them to the subscriber. The Mini-BDA Uplink path receives RF signals
from the subscriber and amplifies and transmits them to the base station. The Uplink
and Downlink occupy two distinct frequency bands. For example, the PCS A

frequency bands are as follows: 1850-1865 MHz for the Uplink and 1930-1945 MHz
for the Downlink. Two diplexers isolate the paths and route each signal to the proper

amplifying channel.

An Automatic Level Control (ALC) allows for output power limiting. A variable step
attenuator gives 0 – 30 dB of attenuation in 2 dB steps. The use of these controls is
covered in the “OPERATION” section, later in this document.

Mini-BDA Options:

The Mini-BDA can be used as a line amplifier. With an optional external bias-tee, the
Mini-BDA will function with power coming from the In-building antenna.

Optional External Bias-Tees

(For .1/.1 Watt Models only)

An optional 9 pin D-sub connector is available for external alarm monitoring (See
Figures 3 & 3a).

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Figure 1

1. 2. 3.

4. 5. 6.

Mini-BDA BLOCK DIAGRAM

1. Up-Link Diplexer - has low pass band insertion loss and high selectivity

2. Down-Link Pre-amp - is a low noise amplifier that drives the Down-Link MPA and offers 38dB
Gain

3. Down-Link MPA – is a medium power amplifier with an ALC circuit which offers 40dB Gain.

(High power amplifier with an ALC circuit which offers 40dB Gain for 1 & 2 Watt models)

4. Up-Link MPA – is a medium power amplifier with an ALC circuit which offers 40dB Gain

5. Up-Link Pre-amp - is a low noise amplifier that drives the Up-Link MPA and offers 38dB Gain

6. Down-Link Diplexer - has low pass band insertion loss and high selectivity

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