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BIRD 428B-83H-01-M - User Manual

BIRD 428B-83H-01-M
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YOU'RE HEARD, LOUD AND CLEAR.
8625 Industrial Parkway, Angola, NY 14006 Tel: 716-549-4700 Fax: 716-549-4772 sales@birdrf.com www.bird-technologies.com
Installation and Operation Manual for
Compact Tower Top Amplifier System
Model 428B-83H-01-M/-48 and 428B-83H-01-C-110/48
and Model 428B-83H-01-T
Manual Part Number
7-9487

Table of Contents

Questions and Answers

  • K
    kristin81Aug 1, 2025
    How to troubleshoot loss of sensitivity in BIRD 428B-83H-01-M Amplifier?
    • J
      Justin MunozAug 1, 2025
      If you're experiencing intermittent or continuous loss of sensitivity with your BIRD Amplifier, there could be several reasons. First, measure the sensitivity and perform a spectrum analysis. If two or more carriers exceed 35 dBm when the desense occurs, it's likely an on-channel TX is stuck. If one carrier exceeds 35 dBm when desense occurs, it indicates Carrier Desense Interference. If carriers are less than 35 dBm, suspect Transmitter Noise Interference. Check the cable, connector, and receiver for defects by testing with amplifiers A and B. Low sensitivity on only one amplifier indicates a failed amplifier. If the operation is the same on both amplifiers A and B, suspect a defective common component.
  • C
    Charles Clements MDAug 11, 2025
    Why lightning arrester of BIRD 428B-83H-01-M Amplifier is damaged?
    • M
      Margaret KnightAug 11, 2025
      Lightning arresters on your BIRD Amplifier can be damaged by direct lightning strikes, as they don't last forever and can eventually fail. A damaged arrester can cause low gain even with functional A & B amplifiers.
  • B
    Bridget McmillanAug 20, 2025
    How to fix power supply failure of BIRD Amplifier?
    • V
      valerievelasquezAug 20, 2025
      In case of power supply failure in your BIRD Amplifier, replace the 250 volt, 2 amp fuse for the AC line.

Summary

Warranty and Terms of Sale

Warranty Policy

Covers product defects, limitations, and warranty exclusions for one year from shipment.

Terms and Conditions of Sale

Details pricing, payment, shipping, claims, and return policies.

Safety and Operational Symbols

Hazard Warnings

Symbols indicating potential dangers such as high voltage, electrical shock, hot surfaces, and heavy lifting.

System Overview

General Description

Tower Top Box (TTA)

Describes the TTA unit, its function, and components.

Base Control Unit

Details the ground-mounted unit housing alarms, power supply, and display.

Base Control Unit Details

Base Control Unit Overview

Describes the unit's function, components, and user interface access.

Functional Block Diagram

MCU and CMU Specifications

MCU Specifications

CMU Specifications

MCU TTA Functional Block Diagram

CMU TTA Functional Block Diagram

Pre-Installation Checkout

Initial Power-Up Test Procedure

Details the procedure for temporarily interconnecting and powering up the system for testing.

System Startup and Testing

Power-Up Sequence and Status

Bench Testing Procedure

Outlines steps for verifying system component functionality and measuring sensitivity.

System Menu Navigation

Menu Selection Chart

System Installation and Testing

CMU Component Interconnection for Testing

Installing the Tower Top Box

Step-by-step guide for mounting the tower top box and securing connections.

MCU System Grounding Guidelines

CMU System Grounding Guidelines

Grounding Requirements

Specifies grounding connections for surge protectors and the CMU ground stud.

Master Ground Buss Connection

Details the connection points and importance of the master ground buss.

System Installation Guideline Notes

Installation Standards

System Optimization and Data Entry

Feedline Data Entry Procedure

System Optimization Overview

Discusses the stages of amplification and the need for adjustments for optimal performance.

Attenuation Settings and Adjustments

Reserve Gain Adjustment

Explains how to adjust reserve gain using manual or automatic modes via software.

Receiver Multicoupler Distribution (MCU Only)

Details adjusting distribution attenuation for optimal receiver multicoupler gain.

Setting MCU Reserve Gain

Reserve Gain Setting Procedures

Determining MCU Reserve Gain

Illustrates the calculation for MCU reserve gain using fixed and variable attenuation.

Setting CMU Reserve Gain

Explains how to set CMU reserve gain using TTA and GTR8000 attenuators.

Attenuator Adjustments

GTR8000 Attenuator Adjustment

Reserve Gain Adjustment Procedure

Step-by-step guide for adjusting programmable attenuation for reserve gain.

System Adjustments and Analysis

Setting Distribution Attenuation (MCU Only)

Spectrum Analysis Overview

Explains the importance of spectrum analysis for receiver performance and sensitivity.

Spectrum Analysis

Spectrum Evaluation Areas

Procedure for Spectral Analysis

Steps to perform a spectral analysis to verify signals and gain adjustments.

Maximum Signal Level Mask

Operational Tests: Sensitivity and Degradation

Static System Sensitivity Measurement

Defines static sensitivity and how to measure it using the test port.

Measuring Static Sensitivity (Load Connected)

Step-by-step procedure for testing static sensitivity with the amplifier input loaded.

Effective System Sensitivity Measurement

Defines effective sensitivity and how to measure it with the antenna connected.

Sensitivity Measurement Calculations

Calculating Actual Sensitivity

Formula and example for calculating actual static and effective sensitivity.

Static Sensitivity Measurement with Load

Details the procedure for measuring static sensitivity with the amplifier input loaded.

Effective Sensitivity and Routine Operation

Measuring Effective Sensitivity (Antenna Connected)

Step-by-step procedure for measuring effective sensitivity with antenna connected.

Degradation Measurement Procedure

Explains how to determine system degradation by comparing static and effective sensitivity.

Amplifier Monitoring and Status

LCD Display and Current Draw Monitoring

Amplifier Status LEDs and Form-C Contacts

System Status Indicators and Alarms

Form-C Alarm Contacts Functionality

System Alarm Conditions

Lists conditions that trigger system alarms, such as abnormal current or communication loss.

System Test Mode Operations

Test Mode Overview and Warnings

Explains how to use the test mode to select active amplifiers and control inputs.

Set LNA X Active Procedure

Terminate LNA X Functionality

System Troubleshooting Guide

Performance Degradation Analysis

Discusses common causes like sensitivity loss and interference, and troubleshooting steps.

Hardware Problem Identification

Identifies common hardware issues such as lightning strikes and vandalism.

Loss of Sensitivity Troubleshooting

A troubleshooting guide for intermittent and continuous loss of receiver sensitivity.

Maintenance and Troubleshooting

Lightning Protection and Arresters

Information on lightning arresters, their function, and potential failure modes.

Periodic Maintenance Schedule

Appendix A: Ethernet Connectivity

Ethernet Connectivity Overview

Direct Connection Procedure

Networked Connection Procedure

TTA Network Configuration Access

Password Prompt and Setup Mode Entry

Entering Setup Mode via Telnet

TTA Network Port Security

Change Setup Menu Navigation

Telnet Security and Password Management

Telnet Security Measures

Changing the Telnet Port Password

Appendix B: Changing Service Computer IP Address

IP Address Change Procedure

Windows XP IP Configuration Steps

IP Address and Subnet Mask Settings

Entering IP Address and Subnet Mask Values

BIRD 428B-83H-01-M Specifications

General IconGeneral
BrandBIRD
Model428B-83H-01-M
CategoryAmplifier
LanguageEnglish

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