MT-4E Analog and P25 Digital Radio Systems - Daniels Electronics

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vi Chapter 5: Daniels Radio System Testing ........................... 17 MT-4E Testing with the IFR 2975 by Aerofl ex .......................................... 17 General Set-Up and Connections ............................................................ 18 Uploading Daniels Confi gurations to the IFR 2975 .......................................18 Radio Service Software (RSS) ......................................................................19 Control Cards ................................................................................................19 Adapters, Cables and Extender Cards ..........................................................19 Daniels MT-4E Radio System Test Sheet ......................................................19 Turning OFF the MT-4E Receiver and Transmitter Modules .........................20 Audio Connections ........................................................................................21 System Regulator Testing ........................................................................ 22 System Voltage Testing .................................................................................22 Receiver Testing ....................................................................................... 23 Receiver Analog Testing ................................................................................23 Receiver Digital Testing .................................................................................28 Receiver Bit Error Rate Testing .....................................................................30 Receiver RF Preselector Alignment and Tuning ............................................32 Receiver Reference Oscillator Adjustment ....................................................34 Transmitter Testing ................................................................................... 37 Transmitter Analog Testing ............................................................................37 Transmitter CTCSS Testing ...........................................................................42 Transmitter Digital Testing .............................................................................45 Transmitter Modulation Fidelity Testing .........................................................47 Transmitter Reference Oscillator Adjustment ................................................49 System Testing ......................................................................................... 51 Duplex Analog Testing ...................................................................................51 Duplex Digital Testing ....................................................................................54 Chapter 6: Additional Radio System Tests ........................... 57 Radio System Testing Through Filtering Equipment ................................ 58 Radio System Testing with the Antenna Connected ................................ 59 VSWR ............................................................................................................59 Receiver Desense .........................................................................................60 RF Carrier Signal Levels on Links between Sites .........................................61 Spurious Signals over the Air ........................................................................62 Chapter 7: Blank Worksheets .............................................. 63 Maintenance Guide MG-001 Daniels MT-4E Radio Systems www.danelec.com
Chapter 1: Daniels Radio Maintenance 1 CHAPTER 1: DANIELS RADIO MAINTENANCE This document is written as a maintenance guide to Daniels Electronics Ltd. MT-4E Analog and P25 Digital Radio Systems. The document assumes the reader is familiar with conventional Two-Way Radio Communications systems and general electronics maintenance practices. This document is a companion document to the Daniels Electronics Ltd. MT-4E Analog and P25 Digital Radio Systems User Guide. INTRODUCTION TO DANIELS MT-4E Daniels MT-4E radio systems are designed for operation in highly varied conditions. Your application may require high performance radio systems (intermodulation and selectivity) for operation in congested radio sites, operation over wide temperatures using battery solar powered systems (low current drain), or a confi gurable system for emergency deployment in a transportable case. Daniels manufactures a diverse range of radio products tailored to the type of operation you need. The MT-4E radio system is characterized by high performance and reliability, whether it is a remote, low current repeater or a high performance base station. The total system is designed to provide dependable, low maintenance performance and great fl exibility for expansion and servicing. The MT-4E series of radio and control modules are packaged in the compact Eurostandard housing with anodized aluminum front panels, and are ruggedly designed for remote or transportable applications. All of the modules use high reliability components and corrosion resistant fasteners. The MT-4E radio system is specifi cally designed to deliver high performance under adverse conditions. Voltage stress testing and a 24 hour burn-in is performed on the radio system and performance of the system at room temperature (25°C) is documented and measured. As an option, extensive environmental testing can be conducted over the temperature range - 30°C to + 60°C and the performance measured to ensure compliance with the design specifi cations. A Daniels MT-4E radio system consists of separate RF receiver and transmitter modules plugged into a standard 19” subrack. Each subrack also requires a control card and system regulator. External connections to the system (COR, PTT, audio, channel select, etc.) are made through an auxiliary connector on the rear of the subrack. An optional cable or terminal strip connector is available to connect externally through the auxiliary connector to the radio system. MG-001 Daniels MT-4E Radio Systems www.danelec.com Maintenance Guide
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MT-4E Analog and P25 Digital Radio Systems - Daniels Electronics

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