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Viavi CX300 ComXpert Manual

Viavi CX300 ComXpert Manual

Communication service monitor
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CX300 ComXpert
Communication Service Monitor
NXDN Option Guide
Rev 000

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Summary of Contents for Viavi CX300 ComXpert

  • Page 1 CX300 ComXpert Communication Service Monitor NXDN Option Guide Rev 000...
  • Page 2 CX300 ComXpert Communications Service Monitor NXDN Option Guide Rev. 000 VIAVI Solutions 1-844-GO-VIAVI www.viavisolutions.com...
  • Page 3 Copyright/Trademarks © Copyright 2024 VIAVI Solutions, Inc. All rights reserved. No part of this guide may be reproduced or transmitted, electronically or otherwise, without written permission of the publisher. VIAVI Solutions and the VIAVI logo are trademarks of VIAVI Solutions Inc.
  • Page 4 Declaration of Conformity VIAVI recommends keeping a copy of the Declaration of Conformity that shipped with the unit with the test set at all times. Warranty Information Warranty information for this product is available on the VIAVI website at https://www.viavisolutions.com/en-us/warranty-information.
  • Page 5 VIAVI has established a take-back processes in compliance with the EU Waste Electrical and Electronic Equipment (WEEE) Directive, 2012/19/EU, and the EU Battery Directive, 2006/66/EC. Instructions for returning waste equipment and batteries to VIAVI can be found in the WEEE section of VIAVI’s Standards and Policies web page.
  • Page 6 For the VIAVI position statement on the use of Proposition 65 chemicals in VIAVI products, see the Hazardous Substance Control section of VIAVI’s Standards and Policies web...
  • Page 7 Record of Revisions Record of Revisions RECORD OF REVISIONS REV. DATE ACCEPTANCE June 2024 VIAVI Rev. 000 CX300 ComXpert NXDN Option Guide 22182561 ROR - i June 2024...
  • Page 8 Conventions ............iv 22182561 CX300 ComXpert NXDN Option Guide Rev 000...
  • Page 9 CX300 ComXpert NXDN Option effectively and efficiently. Related Information This is the CX300 ComXpert NXDN Option Guide 22163052. This manual is to be used in conjunction with the following publications: • CX300 ComXpert Quick Start Guide, 22130635, which provides basic operating and safety information •...
  • Page 10 Refer to Newton’s Telecom Dictionary. and other publications appear in this typeface. Required arguments (text <p a s s w o r d > variables in code). 22182561 CX300 ComXpert NXDN Option Guide Rev 000 June, 2024 Preface - iii...
  • Page 11 Preface Contact Information Contact the Technical Assistance Center (TAC) for technical support or with any questions regarding this or another VIAVI products. • Phone: 1-844-GO-VIAVI • email: Techsupport.avcomm@viavisolutions.com For the latest TAC information, go to: https://www.viavisolutions.com/en-us/services-and-support/support/technical-assistance. Conventions Symbols and Markings...

  • Page 12: Table Of Contents

    Symbol Deviation Meter .........2-8 22182561 CX300 ComXpert NXDN Option Guide Rev 000...
  • Page 13 Terms and Acronyms ............A-1 CX300 ComXpert NXDN Option Guide...
  • Page 14 Figure 3-2 . . . NXDN Receiver Sensitivity Test Setup Diagram ....3-6 22182561 CX300 ComXpert NXDN Operation Manual Rev. 000 June 2024...
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  • Page 16 Table 3-1 ..Testing NXDN (2400 Hz Transceiver) ....... . .3-4 22182561 CX300 ComXpert NXDN Operation Manual Rev. 000...
  • Page 17 This page intentionally left blank.
  • Page 18 NXDN User Interface Layout ......... 1-6 NOTE Testing any transmitter function from a base station requires the use of a 40 dB 150 Watt high power attenuator. 22182561 CX300 ComXpert NXDN Option Guide Rev 000 June, 2024 1 - 1...

  • Page 19: Cx300 Overview

    CX300 Overview CX300 Overview The CX300 ComXpert is a compact, bench-top communications test set for use in the Land Mobile Radio or Two-Way Communications Industry. The CX300 is ideal for performing preventative maintenance on two-way radios and their applicable support infrastructure.

  • Page 20: Cx300 Nxdn Option Features And Capabilities

    When a NXDN software option(s) is purchased as a factory installed option, the NXDN software is ready to use when the test set is received from the factory. 22182561 CX300 ComXpert NXDN Option Guide Rev 000 June, 2024 1 - 3...

  • Page 21: Post Production Option

    See the following steps for selecting and installing Options. Refer to the CX300 ComXpert Communication Service Monitor Operation Manual for more information on option selection. CX300 software is a field-upgradeable software which can be updated using StrataSync™...

  • Page 22: Nxdn Test Modes

    Radio Test mode supports full duplex, Transmit, and Receive capabilities, providing simultaneous access to RF Generator and RF Receiver functions. Radio test mode is typically used for manual testing of subscriber or infrastructure equipment. 22182561 CX300 ComXpert NXDN Option Guide Rev 000 June, 2024 1 - 5...

  • Page 23: Autotest Mode

    The NXDN User Interface (UI) uses the same layout, methods of navigation, and control used in the CX300 Analog Duplex test and measurement mode of operation. Refer to the CX300 ComXpert Operation Manual for a detailed description about the UI layout, accessing system and test screens, and configuring controls and settings.

  • Page 24: Chapter 2 Nxdn Test And Measurement Functions

    Normalize............2-13 NOTE Testing any transmitter function from a base station requires the use of a 40 dB 150 Watt high power attenuator. 22182561 CX300 ComXpert NXDN Option Guide Rev 000 June, 2024 2 - 1...

  • Page 25: Nxdn Generate And Receive Functions

    RF Generator controls and settings are configured from the RF Generator settings menu. Some controls are also accessed from the Quick Access Toolbar or Function Toolbar. Refer to the CX300 ComXpert Operation Manual for detailed descriptions of RF Generator controls and settings.

  • Page 26: Analog Modulation Controls And Settings

    Analog modulation controls and settings are configured from the Analog Mod settings menu. Some controls are also accessed from the Quick Access Toolbar or Function Toolbar. Refer to the CX300 ComXpert Operation Manual for detailed descriptions of Analog Modulation controls and settings.

  • Page 27: Nxdn Meters

    RF Receiver controls and settings are configured from the RF Receiver settings menu. Some controls are also accessed from the Quick Access Toolbar or Function Toolbar. Refer to CX300 ComXpert Communication Service Monitor Operation Manual for detailed descriptions of RF Receiver controls and settings.

  • Page 28: Meter Scale Settings

    When supported, the Avg Samples field is used to define the number of samples that are used to calculate average measurements. 2.2.2.2 Refresh Meters Meter readings are refreshed using the Refresh button ( 22182561 CX300 ComXpert NXDN Option Guide Rev 000 June, 2024 2 - 5...

  • Page 29: Nxdn Demod Controls And Settings

    • Bit Error Rate (BER) is a measure of the number of bit errors that occur in a given number of bit transmissions. This setting selects the NXDN test pattern of the receive Pattern signal. Rev 000 CX300 ComXpert NXDN Option Guide 22182561 2 - 6 June, 2024...

  • Page 30: Analog Demod Meter

    Analog demodulation controls and settings are configured from the Analog Demod settings menu. Some controls are also accessed from the Quick Access Toolbar or Function Toolbar. Refer to the CX300 ComXpert Communication Service Monitor Operation Manual for detailed descriptions of Analog Demod meters, controls, and settings.

  • Page 31: Symbol Deviation Meter

    9600 symbols per second. Symbol deviation measurements should be >945 and <1155 for rate of 4800 symbols per second and >2160 and <2640 for rate of 9600 symbols per second. Rev 000 CX300 ComXpert NXDN Option Guide 22182561 2 - 8 June, 2024...

  • Page 32: Symbol Clock Error Meter

    Bit Error Rate Meter. NOTE BER is calculated over the entire data packet, not just the voice data. Use Standard NXDN Patterns for accurate BER measurements. 22182561 CX300 ComXpert NXDN Option Guide Rev 000 June, 2024 2 - 9...

  • Page 33: Channel Analyzer

    These circles identify the location (from left to right) for deviation: • -1944 Hz • -648 Hz • +648 Hz • +1944 Hz Figure 2-3 Example of Constellation Plot Rev 000 CX300 ComXpert NXDN Option Guide 22182561 2 - 10 June, 2024...

  • Page 34: Distribution Plot

    1800 Hz. Conversely, a plot that is narrower than the dashed lines would indicate a symbol deviation less than 1800 Hz. 22182561 CX300 ComXpert NXDN Option Guide Rev 000 June, 2024 2 - 11...

  • Page 35: Eye Diagram

    Table 2-3 Eye Diagram Controls and Settings Control/Setting Description The Symbol Count button selects the number of Symbol Count Button symbols Rev 000 CX300 ComXpert NXDN Option Guide 22182561 2 - 12 June, 2024...

  • Page 36: Audio Controls And Signal Routing

    Normalize optimizes various performance parameters, including carrier leakage, IQ gain and balance, Third Order Intercept (IP3), and level correction. Refer to the CX300 ComXpert Operation Manual for additional information about this function. 22182561...
  • Page 37 Chapter 2 NXDN Test and Measurement Functions Normalize This page intentionally left blank. Rev 000 CX300 ComXpert NXDN Option Guide 22182561 2 - 14 June, 2024...

  • Page 38: Chapter 3 Nxdn Measurements

    NXDN Measurements Chap ter 3 This chapter provides task-based instructions for using the CX300 ComXpert to establish NXDN calls and to perform key NXDN tests and measurements. This chapter describes how to use the CX300 in the following test scenarios.

  • Page 39: Testing Nxdn Phase 1 Transceiver

    OEM tuner or programming software for this test. 3.1.2 Equipment Needed The following equipment is required to perform the test procedures defined in this section: • CX300 ComXpert Test Set • RF Coaxial Cable and adapters 3.1.3 Hardware Setup Diagram...

  • Page 40: Configuring The Cx300 Test Set

    Chapter 3 NXDN Measurements Testing NXDN Phase 1 Transceiver 3.1.4 Configuring the CX300 Test Set Select the CX300 ComXpert Tab. Select Communications Test on the Mode Pane. Select NXDN on the Measure Pane. Click the Done button. Select the RF Generator menu.

  • Page 41: Testing Nxdn Transmitter

    RF Frequency Error (ppm) -10 (ppm) 10 (ppm) Symbol Clock Error (ppm) 5(%) FSK Error (%) 2160 2400 2640 Symbol Deviation (Hz) (Radio Specific) (Signal Power) BER (%) Rev 000 CX300 ComXpert NXDN Option Guide 22182561 3 - 4 June, 2024...

  • Page 42: Testing Nxdn Receiver

    3.2.2 Equipment Needed The following equipment is required to perform the test procedures defined in this section: • CX300 ComXpert Test Set • RF Coaxial Cable and adapters • UUT OEM tuner or programming software (if required - see note below) NOTE BER may be measured in different manners depending on the radio manufacturer.

  • Page 43: Test Setup

    BER, until the UUT reports a BER of 5%. Record the RF Generator output level. If no further testing is to be conducted, disconnect and power Off the UUT. Rev 000 CX300 ComXpert NXDN Option Guide 22182561 3 - 6 June, 2024...

  • Page 44: Appendix A Terms And Acronyms

    NXDN — Digital Mobile Radio (NXDN) Test System dBm — decibel milliwatts DES — Data Encryption Standard DEST ID — Destination Identifier DUT — Device Under Test 22182561 CX300 ComXpert NXDN Option Guide Rev 000 June, 2024 A - 1...
  • Page 45 U - Z TGID — Talk Group Identifier UI — User Interface USB — Universal Serial Bus UUT — Unit Under Test WACN — Wide Area Communications Network Rev 000 CX300 ComXpert NXDN Option Guide 22182561 A - 2 June, 2024...
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  • Page 47 CX300 ComXpert Communication Service Monitor NXDN Option Guide 22182561 Rev. 000 June, 2024 English VIAVI Solutions North America: 1.844.GO VIAVI / 1.844.468.4284 Latin America +52 55 5543 6644 EMEA +49 7121 862273 APAC +1 512 201 6534 All Other Regions:...

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