Nautel NV30LT-N Manual

3: OPERATIONS & MAINTENANCE
MANUAL
NV30LT-N
TRANSMITTER
Document ID: NHB-NV30LTN-OPS
Version: 0.1
Issue Date: 2015-03-01
Status: Preliminary
Making Digital Radio Work

VERSION 0.1 2015-03-01 PAGE III
NV30LT-N 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 2015 NAUTEL. All rights reserved.

NV30LT-N OPERATIONS & MAINTENANCE MANUAL TABLE OF CONTENTS
VERSION 0.1 2015-03-01 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
Viewing Transmitter Log 3.2.23
Viewing Tool Menu Panels 3.2.32
Viewing Real-Time Meters 3.2.44
Presets - Editing Operational Settings 3.2.51
Resetting Alarms 3.2.86
Viewing Transmitter Status - AUI 3.2.87
User Settings - AUI 3.2.89
User Settings - Front Panel UI 3.2.112
User Accounts 3.2.121
System Settings 3.2.125
Configuring Remote Inputs and Outputs 3.2.145
Preset Scheduler 3.2.159
Audio Player 3.2.162
Changing Exciter Transfer Settings 3.2.168
Enabling and Operating the Orban Audio Processor 3.2.171

NV30LT-N OPERATIONS & MAINTENANCE MANUAL TABLE OF CONTENTS
PAGE 3.VI VERSION 0.1 2015-03-01
Routine Maintenance 3.3.1
Scheduled Maintenance 3.3.1
Replacing an Air Filter 3.3.3
Performing On-Air Checks 3.3.5
Replacing the Controller Assembly’s Battery 3.3.6
Removing the Exciter’s Battery 3.3.8
Inspecting Lightning Protection Systems 3.3.10
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

NV30LT-N OPERATIONS & MAINTENANCE MANUAL
VERSION 0.1 2015-03-01 PAGE 3.VII
RELEASE CONTROL RECORD
ISSUE DATE REASON
0.1 2015-03-01 Preliminary Release of NV30LT-N (NARF74/01)

NV30LT-N OPERATIONS & MAINTENANCE MANUAL
PAGE 3.VIII VERSION 0.1 2015-03-01

NV30LT-N OPERATIONS & MAINTENANCE MANUAL DESCRIPTION
VERSION 0.1 2015-03-01 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 diagram, Figure 3.1.1 on page 3.1.11.
NV30LT-N Electrical Schematics
Some descriptions in this section refer to electrical schematics (SD-#s) . These are located in Section 4 of
the NV30LT-N Troubleshooting Manual.
Ac-Dc Power Stage
See electrical schematic Figures SD-1A/B/C SD-2 and SD-3. 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, reject load assemblies and splitter
assembly. 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, **175 - 265 V ac (208 V ac nominal)
3-phase, **303 - 459 V ac (380 V ac nominal)
1-phase, **175 - 265 V ac (240 V ac nominal)
NOTE: ** - The NV30LT-N’s full ac input range is 90 - 265 V ac (or 156 - 459 V ac, as applicable), but RF
output power is limited when the voltage is less than 175 V ac (or 303 V ac, as applicable).
The ac-dc power stage comprises ac input terminal block TB1, power supply interface PWBs (A1, A17
and A33), low voltage power supply (LVPS) modules 1A (U2), 1B (U3, if purchased), and power supply
modules (U4 through U11 and U14 through U29), two for each of the 12 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. Ac voltage is distributed from TB1 to TB2 (power rack 1) TB3 (power
rack 2) and TB4 (power rack 3).

NV30LT-N OPERATIONS & MAINTENANCE MANUAL DESCRIPTION
PAGE 3.1.2 VERSION 0.1 2015-03-01
Power Supply Interface PWB
See electrical schematic Figures SD-1A/B/C, SD-2 and SD-3. Each power supply (PS) interface PWB ():
interfaces between the ac input on terminal blocks TB2 (PWB A1), TB3 (PWB A17), TB4 (PWB
A33)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 ac input 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-2. LVPS modules 1A (U2), 1B (U3, if purchased), 2A (U12, if
purchased) and 2B (U13, if purchased) 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 PWBs. Each LVPS module senses excessive temperature
conditions and applies an Overtemp Warning signal (for indication purposes only) to the module
control/interface PWB. Each LVPS module also has a low power capacity to allow operation at lower ac
input voltages with a user-provided UPS.
Power Supply Modules
See electrical schematic Figure SD-2 and SD-3. Power supply modules U4 through U11 and U14 through
U29 convert the ac input voltage to a regulated dc supply (PA volts) for all 12 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 PWBs. Alarms
that are internal to the power supply module are applied to the controller module via a serial (RS485)
interface. The modules also sense 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.