Nautel VX150 Manual

2: OPERATIONS & MAINTENANCE

MANUAL

VX150 TO VX2

TRANSMITTER

Document ID: NHB-VX150-VX2-OPS

Version: 0.2

Issue Date: 2021-01-14

Status: Preliminary

Making Digital Radio Work

VERSION 0.2 2021-01-14 PAGE III

VX-LP OPERATIONS & MAINTENANCE MANUAL

Contact Information

Nautel Limited

10089 Peggy’s Cove Road

Hackett’s Cove, NS Canada B3Z 3J4

Toll Free: +1.877.6NAUTEL (662.8835)

(Canada & USA only) or

Phone: +1.902.823.3900 or

Fax: +1.902.823.3183

Nautel Inc.

201 Target Industrial Circle

Bangor, Maine USA 04401

Phone: +1.207.947.8200

Fax: +1.207.947.3693

Customer Service (24-hour support)

+1.877.628.8353 (Canada & USA only)

+1.902.823.5100 (International)

Email: [email protected]

Web: www.nautel.com

The comparisons and other information provided in this document have

been prepared in good faith based on publicly available information.

For verification of materials, the reader is encouraged to consult the

respective manufacturer's most recent publication on the official

website or through contact with Customer Service.

VX150 TO VX2 OPERATIONS & MAINTENANCE MANUAL TABLE OF CONTENTS

VERSION 0.2 2021-01-14 PAGE 2.V

CONTENTS

Contact Information 4.1.iii

RELEASE CONTROL RECORD vii

Description 2.1.1

Ac-Dc Power Stage 2.1.1

Control/Excitation Stage 2.1.4

RF Stage 2.1.5

Operating the Transmitter 2.2.1

User Interface Options 2.2.3

Front Panel User Interface (FPUI) 2.2.4

Advanced User Interface (AUI) 2.2.7

Managing and Displaying Widgets 2.2.13

AUI Menu Page 2.2.25

Viewing Transmitter Alarms 2.2.28

Viewing Transmitter Status - using the AUI 2.2.30

Meters 2.2.31

Presets 2.2.32

Preset Scheduler 2.2.50

Audio Player 2.2.53

System Settings 2.2.57

Configuring Remote Inputs and Outputs 2.2.101

Routine Maintenance 2.3.1

Scheduled Maintenance 2.3.1

Replacing an Air Filter 2.3.1

Performing On-Air Checks 2.3.3

VX150 TO VX2 OPERATIONS & MAINTENANCE MANUAL TABLE OF CONTENTS

PAGE 2.VI VERSION 0.2 2021-01-14

Non-standard maintenance 2.4.1

Upgrading Software 2.4.1

OS Password Recovery 2.4.4

SD Card Replacement 2.4.4

List of terms 2.5.1

VX150 TO VX2 OPERATIONS & MAINTENANCE MANUAL

VERSION 0.2 2021-01-14 PAGE VII

RELEASE CONTROL RECORD

ISSUE DATE REASON

0.1 2020-12-01 Initial release for VX low power models. Supports hardware

versions:

VX150, VX300, VX600 (NARF81)

VX1 (NARF79)

VX1.5. VX2 (NARF80)

Supports software version VX SW 1.0 and later.

0.2 2021-01-14 Implemented Engineering review changes in sections

VX-LP OPERATIONS & MAINTENANCE MANUAL

PAGE VIII VERSION 0.2 2021-01-14

VX150 TO VX2 OPERATIONS & MAINTENANCE MANUAL DESCRIPTION

VERSION 0.2 2021-01-14 PAGE 2.1.1

SECTION 2.1: DESCRIPTION

This section provides a high-level description of the transmitter’s key sections. The transmitter circuitry

is subdivided into four basic stages:

Ac-Dc Power Stage

Control/Excitation Stage - see page 2.1.4

RF Stage - see page 2.1.5

Refer to the functional block diagram, Figure 3.1.1 on page 3.1.9.

VX150 to VX2 Electrical Schematics

Some descriptions in this section refer to electrical schematics (SD-#s). These are located in Section 4 of

the VX150 to VX2 Troubleshooting Manual.

Ac-Dc Power Stage

See electrical schematic Figure SD-1. The ac-dc power stage provides power to operate the low voltage

power supply, which generates the +12 dc voltage that is used throughout the transmitter. This supplies

the voltage to operate cooling fans, IPA and power the PWBs. The ac-dc power stage also contains a dc

power supply that provides positive dc voltage (PA volts) for the transmitter's RF power amplifier. The

output voltage range of the dc power supply varies with the model. For VX150 to VX600 transmitters,

the output voltage range is between +18 and 53 V dc. For VX1to VX2 transmitters, the output voltage

range is between +23 and 65 V dc.

For normal operation, VX150 to VX600 transmitters accept a single-phase, 90 - 265 V ac (220 V ac

nominal) ac input voltage.

For normal operation, VX1 to VX2 transmitters accept a single-phase, 185 - 265 V ac (220 V ac nominal)

ac input voltage.

NOTE

: VX1 to VX2 transmitters can operate from a 90-185 V ac input,

but will have reduced output

power.

The ac-dc power stage consists of Power Supply Interface PWB (A4), low voltage power supply (LVPS)

(U2) and power supply (U3).

VX150 TO VX2 OPERATIONS & MAINTENANCE MANUAL DESCRIPTION

PAGE 2.1.2 VERSION 0.2 2021-01-14

Power Supply Interface PWB

See electrical schematic Figure SD-1. The Power Supply (PS) Interface PWB (A4):

interfaces between the ac input and the LVPS and the power supply.

distributes LVPS voltage to the RF drive (exciter) stage and the control/monitor stage.

distributes PA voltage to the RF power stage and the control/monitor stage.

controls, with the controller module, the LVPS output voltage.

provides RS485 serial communication between the system interface PWB and the power

supply.

provides status and alarm outputs from the LVPS and power supply, consisting of Module

Present, Power Fail Warning, Rectifier Fault and Overtemp Warning (provided to the Module

Control/Interface PWB over a serial bus).

Low Voltage Power Supply

See electrical schematic Figure SD-1. LVPS module (U2) converts the ac input voltage to the regulated

output (+12 V dc). This voltage is used to power all the PWBs, the cooling fans and the IPA.

Power Supply Modules

See electrical schematic Figure SD-1. Power supply module U3 converts the ac input voltage to a

regulated dc supply (PA volts) for the RF amplifier and provides an output voltage between 18 V and

53 V for the VX150 to VX600, and between 23 and 65 V dc for VX1 to VX2). The modules regulate the

output voltage based on a serial control input from the Power Supply Interface PWB (A4). The supply

also senses out-of-regulation on the ac input and dc output, and applies a Power Fail Warning signal to

the Exciter PWB. Both conditions cause the power supply to shut itself down, thus shutting down the

transmitter's RF output. All power supply module signals are applied to the exciter for system level

monitoring.

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