G Way Solutions PS825W60R User Manual

INSTALLATION

AND

OPERATING MANUAL

FOR

RHBDA-PS8-0.1/25W-55-A (R)

RACK BI-DIRECTIONAL AMPLIFIER

TABLE OF CONTENTS

PARAGRAPH PAGE NO

RHBDA OVERVIEW 3
RHBDA BLOCK DIAGRAM DESCRIPTION 3

OPTIONAL EXTERNAL FILTER (Figure 1) 3

RHBDA BLOCK DIAGRAM DRAWING (Figure 2) 4
ELECTRICAL SPECIFICATIONS 5

MECHANICAL CONNECTIONS 6
ENVIRONMENTAL CONDITIONS 6
RHBDA CONNECTIONS 6
MECHANICAL OUTLINE DRAWING (Figure 3) 7
OPTIONAL ALARM CONDITIONS (Figure 3a) 7
RHBDA INSTALLATION 8

RHBDA OPERATION 9

FRONT PANEL ADJUSTMENT (Figure 4) 10
BACK PANEL CONNECTORS (Figure 4a) 10

RF EXPOSURE WARNING 11
DIAGNOSTICS GUIDE 11

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RHBDA OVERVIEW:

The RHBDA assembly enhances 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.

RHBDA BLOCK DIAGRAM DESCRIPTION

:

Refer to Figure 1 for the following discussion.

The RHBDA Downlink path receives RF signals from a Source, amplifies the RF
signal, and transmits the signal to the subscriber. The RHBDA Uplink path receives
RF signals from the subscriber then amplifies the RF Signal, and sends it to the
Base. The Uplink and Downlink occupy two distinct frequency bands. The frequency

bands are as follows: 806-824 MHz for the Uplink and 851-869 MHz for the Downlink.
Two Filters and one diplexer isolate the Uplink and Downlink paths.

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 on the Rack
Uplink and Rack Downlink paths. The use of these controls is covered in the
“OPERATION” section, later in this document.

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Figure 2

1. 2. 3.

4. 5. 6.

RHBDA BLOCK DIAGRAM

1. Downlink Filter - has a narrow bandpass and high selectivity.

2. Downlink LNA & Attenuator – 0-30 dB in 2-dB steps of attenuation on the Downlink
input signal with a pre-amplifier that has 20 dB gain.

3. Downlink HPA – is a High power amplifier with an ALC circuit which offers 40dB Gain.

4. Uplink Filter - has a narrow bandpass and high selectivity.

5. Uplink LPA – is a Low power amplifier consisting of two modules, with an ALC circuit
which offers 60dB Gain.

6. Mobile Diplexer - has low bandpass insertion loss and high selectivity.

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