G Way Solutions PCS25W90 User Manual

INSTALLATION

AND

OPERATING MANUAL

FOR

RBDA-PCS-1/25W-90-A

INDOOR REPEATER

TABLE OF CONTENTS

PARAGRAPH PAGE NO

BDA OVERVIEW 3
BDA BLOCK DIAGRAM DESCRIPTION 3
FCC INFORMATION FOR USER 3
BDA BLOCK DIAGRAM DRAWING (Figure 1) 4
ELECTRICAL SPECIFICATIONS 5
FREQUENCY TABLE 6
MECHANICAL SPECIFICATIONS 7
ENVIRONMENTAL CONDITIONS 7
BDA CONNECTIONS 7
MECHANICAL OUTLINE DRAWING (Figure 2) 8
BDA INSTALLATION 9
RF EXPOSURE WARNING 9
BDA OPERATION 10
VARIABLE GAIN ADJUSTMENT (Figure 3) 11
BACK PANEL (Figure 4) 11
DIAGNOSTICS GUIDE 12

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BDA OVERVIEW:

The BDA assembly extends the coverage area of radio communications in buildings
and RF shielded environments.
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.

BDA CIRCUIT DESCRIPTION

:

Refer to figure 1 for the following discussion.
The BDA Downlink path receives RF signals from the base station and amplifies and

transmits them to the subscriber. The 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.

A selectable 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.

FCC INFORMATION for USER

:

NOTE: This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this equipment
does cause harmful interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is encouraged to try to
correct the interference by one or more of the following measures:

¾ Reorient or relocate the receiving antenna.
¾ Increase the separation between the equipment and receiver.
¾ Connect the equipment into an outlet on a circuit different from that to which

the receiver is connected.

¾ Consult the dealer or an experienced radio/TV technician for help.

Changes or modifications not expressly approved by G-Wave, Inc. could void the
user’s authority to operate this equipment

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Figure 1

1. 2. 3.

6.

7.

4. 5.

BDA Block Diagram

1. Uplink Diplexer - has low bandpass insertion loss and high selectivity

2. Downlink Pre-amp - is a low noise amplifier that drives the Downlink PA and
offers 46dB Gain

3. Downlink PA – is a power amplifier with an ALC circuit which offers 43dB Gain

4. Uplink MPA – is a medium power amplifier with an ALC circuit which offers 43dB
Gain

5. Uplink Pre-amp - is a low noise amplifier that drives the Uplink MPA and offers
46dB Gain

6. Filters used on High-Gain Repeaters (90dB) to provide better isolation between
Tx & Rx frequencies and to aid the diplexer rejection.

7. Downlink Tx filter is enhanced for High Power applications, preventing arching
when the power amplifier approaches the 1dB compression point.

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