Nautel GV5 Manual

3: OPERATIONS & MAINTENANCE
MANUAL
GV5/GV3.5
TRANSMITTER
Document ID: NHB-GV3.5-GV5-OPS
Version: 0.2
Issue Date: 2014-07-23
Status: Preliminary
Making Digital Radio Work

VERSION 0.2 2014-07-23 PAGE III
GV5/GV3.5 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: [phone] or
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.
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.
© Copyright 2013 NAUTEL. All rights reserved.

GV5/GV3.5 OPERATIONS & MAINTENANCE MANUAL TABLE OF CONTENTS
VERSION 0.2 2014-07-23 PAGE 3.V
CONTENTS
Contact Information 3.iii
RELEASE CONTROL RECORD 3.vii
Description 3.1.1
Ac-Dc Power Stage 3.1.1
Control/Monitor Stage 3.1.3
RF Drive Stage 3.1.4
RF Power Stage 3.1.5
Operating the Transmitter 3.2.1
User Interface Options 3.2.4
Advanced User Interface (AUI) 3.2.9
Controller Front Panel 3.2.17
Home Page 3.2.24
Viewing Transmitter Log 3.2.27
Viewing Tool Menu Panels 3.2.37
Viewing Real-Time Meters 3.2.53
Presets - Editing Operational Settings 3.2.60
Resetting Alarms 3.2.98
Viewing Transmitter Status - using the AUI 3.2.99
System Settings 3.2.101
User Accounts 3.2.130
Changing Exciter Transfer Settings 3.2.134
User Settings - AUI 3.2.137
User Settings - Controller UI 3.2.166
Configuring Remote Inputs and Outputs 3.2.173
Preset Scheduler 3.2.187
Audio Player 3.2.190

GV5/GV3.5 OPERATIONS & MAINTENANCE MANUAL TABLE OF CONTENTS
PAGE 3.VI VERSION 0.2 2014-07-23
Enabling and Operating the Orban Audio Processor 3.2.196
Routine Maintenance 3.3.1
Scheduled Maintenance 3.3.1
Replacing an Air Filter 3.3.3
Performing On-Air Checks 3.3.6
Replacing the Controller Module’s Battery 3.3.7
Inspecting Lightning Protection Systems 3.3.9
Non-standard maintenance 3.4.1
Upgrading Software 3.4.1
Configuring a Mod Loss Backup Preset 3.4.4
List of terms 3.5.1

GV5/GV3.5 OPERATIONS & MAINTENANCE MANUAL
VERSION 0.2 2014-07-23 PAGE 3.VII
RELEASE CONTROL RECORD
ISSUE DATE REASON
0.1 2013-04-04 Preliminary Release of GV5/GV3.5 (NARF71A/02)
0.2 2014-07-23 Updated Section 2: Operating the Transmitter for software
version 4.1; added information for Xmtr PA Bias routine

GV5/GV3.5 OPERATIONS & MAINTENANCE MANUAL
PAGE 3.VIII VERSION 0.2 2014-07-23

GV5/GV3.5 OPERATIONS & MAINTENANCE MANUAL DESCRIPTION
VERSION 0.2 2014-07-23 PAGE 3.1.1
SECTION 3.1: 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/Monitor Stage - see page 3.1.3
RF Drive Stage - see page 3.1.4
RF Power Stage - see page 3.1.5
Refer to the functional block diagrams: Figure 3.1.1 on page 3.1.9 (GV5/GV3.5 transmitter) and Figure
3.1.2 on page 3.1.10 (audio path).
GV5/GV3.5 Electrical Schematics
Some descriptions in this section refer to electrical schematics (SD-#s) . These are located in Section 4 of
the GV5/GV3.5 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 supplies, which generate the 40 to 48 V dc voltage that is converted to the low level dc voltages
(±15 V and +5 V) used throughout the transmitter. This voltage is also conditioned to operate cooling
fans in the RF power module and reject load assemblies. The ac-dc power stage also converts the ac
power source to a positive dc voltage (PA volts) for the transmitter's RF power amplifiers and exciter(s).
The transmitter accepts a wide range of ac input voltage options:
3-phase, 180 - 264 V ac (208 V ac nominal)
3-phase, 312 - 457 V ac (380 V ac nominal)
1-phase, 180 - 264 V ac (240 V ac nominal)
The ac-dc power stage comprises ac input terminal block TB1, power supply interface PWB (A1), low
voltage power supply (LVPS) modules A (U2), B (U3), and power supply modules (U4 through U7), two
for each of the two RF power modules. There are three amber LED pilot lamps (DS1 through DS3),
located in the bottom, rear of the cabinet, that indicate the presence of each ac phase.

GV5/GV3.5 OPERATIONS & MAINTENANCE MANUAL DESCRIPTION
PAGE 3.1.2 VERSION 0.2 2014-07-23
Power Supply Interface PWB
See electrical schematic Figure SD-1. The power supply (PS) interface PWB (A1):
interfaces between the ac input on terminal block TB1 and the LVPS and power supply
modules.
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 module control/interface PWB and the RF
power module power supplies.
allows configuration of the LVPS modules if the UPS option is installed.
provides status and alarm outputs from the LVPS and power supply modules, consisting of
Module Present, Power Fail Warning, Rectifier Fault and Overtemp Warning (provided to the
module control/interface PWB over a serial bus).
LVPS Modules
See electrical schematic Figure SD-1. LVPS modules A (U2) and B (U3) convert the ac input voltage to
the regulated output (40 - 48 V dc, nominally 40 V) that is applied to, and controlled by, the controller
module via the module control/interface PWB. +5 V, +15 V and -15 V regulated outputs are developed
from the LVPS output voltage (40 - 48 V dc) on the module control/interface PWB.
Power Supply Modules
See electrical schematic Figure SD-1. Power supply modules U4 through U7 convert the ac input voltage
to a regulated dc supply (PA volts) for both RF power modules. Each switching power supply module is
rated for a nominal 2725 W and provides an output voltage between 18 V and 53 V (typically 40 V). The
modules regulate the output voltage based on a serial control input from the controller module (A4),
applied via the module control/interface PWB. Each module has a built-in cooling fan, senses excessive
temperature conditions and applies an Overtemp Warning signal (for indication purposes only) to the
module control/interface PWB. The module also senses out-of-regulation on the ac input and dc output,
and applies a Power Fail Warning signal to the module control/interface PWB. Both conditions cause the
power supply to shut itself down, thus reducing the transmitter's RF output. All power supply module
signals are applied to the controller for system level monitoring.