Nautel VS300 User manual

VS300 Transmitter
Operations and Maintenance
Manual
Document:NHB-VS300-OPS
Issue: 8.0 2016-03-01
Status: Standard

Nautel Limited
10089 Peggy’s Cove Road
Hackett’s Cove, NS Canada B3Z 3J4
Phone: [phone] or
Toll Free: +1.877.6NAUTEL (6628835) (Canada & USA only)
Fax: [phone]
Nautel Inc.
201 Target Industrial Circle
Bangor, Maine USA 04401
Phone: [phone]
Fax: [phone]
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. The reader is encouraged to consult the respective
manufacturer's most recent published data for verification.
© Copyright 2016 NAUTEL. All rights reserved.

VS300 Operations and Maintenance Manual Table of contents
Page v
Contents
Release control record vii
Description 1-1
Ac-dc power stage 1-1
Exciter/control stage 1-3
RF drive stage 1-4
RF power stage 1-4
Operating the transmitter 2-1
User Interfaces 2-9
Viewing Transmitter Log 2-23
Viewing AUI Tool Menu Panels 2-30
Viewing Real-Time Meters 2-47
Managing Presets 2-54
Enabling Remote Control 2-97
Resetting Alarms 2-97
Viewing Transmitter Status 2-98
System Settings 2-99
System Settings - Front Panel UI 2-112
Setting User Accounts 2-123
User Settings - AUI 2-126
User Settings - Front Panel UI 2-154
Configuring Remote Inputs and Outputs 2-164
Scheduler 2-178
Audio Player 2-181
Enabling and Operating the Orban Audio Processor 2-186

VS300 Operations and Maintenance Manual Table of contents
Page vi Issue 8.0 2016-03-01
Routine maintenance 3-1
Scheduled maintenance 3-1
Performing on-air checks 3-3
Replacing the exciter/control PWB battery 3-4
Non-standard maintenance 4-1
Upgrading software 4-1
Configuring an audio loss backup preset 4-5
List of terms 5-1

VS300 Operations and Maintenance Manual
Issue 8.0 2016-03-01 Page vii
Release control record
Issue Date Reason
8.0 2016-03-01 Hardware Release 8 (NARF64G and NARF64G/01).
Supports software version VS SW 4.3 and higher.

VS300 Operations and Maintenance Manual
Page viii Issue 8.0 2016-03-01

VS300 Operations and Maintenance Manual Description
Issue 8.0 2016-03-01 Page 1-1
Section 1: Description
Refer to the functional block diagram: Block Diagram - VS300 Transmitter - see page 1-7.
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
•Exciter/control stage - see page 1-3
•RF drive stage - see page 1-4
•RF power stage - see page 1-4
VS300 electrical schematics
Some descriptions in this section refer to electrical schematics (SD-#s) . These are located in
Section 5 of the VS300 Troubleshooting Manual.
Ac-dc power stage
See also electrical schematic Figure SD-1.
The ac-dc power stage converts the ac power source to a positive dc voltage (PA volts) for the
transmitter's pre-amp/IPA PWB and PA PWBs. The transmitter accepts a 1-phase ac input voltage
that is between 180 and 264 V ac (208 V ac nominal).
The ac-dc power stage provides +48 V to operate the RF power stage’s cooling fan as well as the low
level dc voltages (+15 V and +5 V) for the control/monitoring circuitry used throughout the
transmitter.
The ac-dc power stage consists of ac power entrance U1, circuit breaker CB1, power supply module
U2, LVPS module U3, +48 V power supply module U4 and PS distribution PWB A2.

VS300 Operations and Maintenance Manual Description
Page 1-2 Issue 8.0 2016-03-01
Power supply module
See also electrical schematic Figure SD-1. Power supply module U2 converts the ac input voltage to a
regulated dc supply (PA volts) for the PA PWB in the RF power stage. The power supply module is
rated for a nominal 2000 W and provides an output voltage between 7 and 53 V (typically 48 V). The
module regulates the output voltage based on a PA Volts Control input from the exciter/control PWB
(A1). The module has a built-in cooling fan, senses excessive temperature conditions, and applies a PS
Temp alarm signal to the exciter/control PWB. The module also senses out-of-regulation on the ac
input and dc output, and applies PS Ac Fail and PS Fail alarm signals to the exciter/control PWB. All
three alarm conditions cause the power supply to shut itself down, thus inhibiting the transmitter's
RF output.
LVPS module
See also electrical schematic Figure SD-1. The LVPS module (U3) converts the ac input voltage to the
regulated low voltage dc supplies. The +5 V and +15 V regulated outputs of the supply are applied
throughout the transmitter.
+48 V power supply
See also electrical schematic Figure SD-1. The +48 V power supply module (U4) converts the ac input
voltage to a regulated +48 V dc supply for the pre-amp PA PWB, and the cooling fan.
PS distribution PWB
See also electrical schematics Figures SD-1 and SD-3. The PS distribution PWB (A2) interfaces
between the dc power supplies (power supply module, +48 V supply and LVPS) and the rest of the
transmitter. It distributes the power supply module output to the PA PWB and distributes the +48 V
output to the pre-amp PWB and the cooling fan.
Dc current samples of the PA and pre-amp power supplies are measured on the PS distribution PWB
and provided to the exciter/control PWB over an SPI bus.
Status and alarm outputs from the power supply module (U2), consisting of PS Present, PS Ac Fail, PS
Temp and PS Fail, are applied to the PS distribution PWB and provided to the exciter/control PWB
over an SPI bus.
A fan enable circuit on the PS distribution PWB controls the application of +48 V to the cooling fan.
The exciter/control PWB (A1) provides a Fan Enable signal that enables or disables the fan voltage
when the RF power stage is on or off, respectively.