G Way Solutions 2PGN10W90 User Manual

INSTALLATION

AND

OPERATING MANUAL

FOR

BDA-XXX-1/10W-X0-A

BI-DIRECTIONAL AMPLIFIER

TABLE OF CONTENTS

PARAGRAPH PAGE NO

BDA OVERVIEW 3
BDA BLOCK DIAGRAM DESCRIPTION 3
BDA BLOCK DIAGRAM DRAWING (Figure 1) 4
ELECTRICAL SPECIFICATIONS 5
FREQUENCY RANGES (Table 1) 6
MECHANICAL SPECIFICATIONS 7
ENVIRONMENTAL CONDITIONS 7
BDA CONNECTIONS 7
MECHANICAL OUTLINE DRAWING (Figure 2 & 2a) 8
RF EXPOSURE WARNING 9
BDA INSTALLATION 10
BDA OPERATION 11
UPLINK MECHANICAL OUTLINE- ADJUSTMENT

(Figure 3)
DOWNLINK MECHANICAL OUTLINE- ADJUSTMENT
(Figure 4)
DIAGNOSTICS GUIDE 14

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12
13

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 BLOCK DIAGRAM DESCRIPTION

:

Refer to figure 1 for the following discussion.
The BDA Downlink path receives RF signals from the base statio n 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 SMR frequency
bands are as follows: 806-821 MHz for the Uplink and 851-866 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.

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Figure 1

1. 2. 3.

6.

4. 5.

BDA BLOCK DIAGRAM

BDA-XXX-1/10W-X0-A

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

2. Downlink Pre-amp - is a low noise amplifier that drives the Downlink HPA and offers
45dB Gain, 50 dB gain for -90 models.

3. Downlink PA – is a high power amplifier with an ALC circuit which offers 43dB Gain,
48 dB gain for -90 models.

4. Uplink MPA – is a medium power amplifier with an ALC circuit which offers 43dB
Gain, 48 dB gain for -90 models.

5. Uplink Pre-amp - is a low noise amplifier that drives the Uplink MPA and offers 45dB
Gain, 50 dB gain for -90 models.

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

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ELECTRICAL SPECIFICATIONS

:

Frequency Range : See Table 1
Pass band Gain @ min attenuation : 80 dB min, 90 dB min for -90 Models
Variable Step Attenuator Range : 0-30 dB

(2-dB steps)
Pass band Ripple : ±1.5 dB (typ)

Noise Figure @+25

20 dB Bandwidth
Uplink : 8 MHz
Downlink : 20 MHz

3rd Order Intercept point
Uplink : +45 dBm (typ)
Downlink : +50 dBm (typ)

*Output Power @ 1dB Compression
Uplink : +32 dBm (typ)
Downlink : +40 dBm (typ)

*ALC Factory Set Point
Uplink : +25 dBm
Downlink : +32 dBm

Isolation between Up/Down Link : 100 dB min
Input/ Output Impedance : 50 Ohms
VSWR (Input/Output) : 1.5: 1 max

Power Supply : 110VAC/1.20Amp

*The Manufacturer's rated output power of this equipment is for single carrier operation. For situations
when multiple carrier signals are present, the rating would have to be reduced by 3.5 dB, especially
where the output signal is re-radiated and can cause interference to adjacent band users. This power
reduction is to be by means of input power or gain reduction and not by an attenuator at the output of
the device.

°C at max gain : 5.0 dB max

: 240VAC/0.60 Amp
: 50 to 60 Hz

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