Nautel NV30LT-N Operation & Maintenance Manual
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Nautel NV30LT-N Operation & Maintenance Manual

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

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Summary of Contents for Nautel NV30LT-N

  • Page 1 3: OPERATIONS & MAINTENANCE MANUAL NV30LT-N RANSMITTER Document ID: NHB-NV30LTN-OPS Version: Issue Date: 2015-03-01 Status: Preliminary Making Digital Radio Work...

  • Page 3: Contact 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. VERSION 0.1 2015-03-01 PAGE III...

  • Page 5: Table Of Contents

    NV30LT-N OPERATIONS & MAINTENANCE MANUAL TABLE OF CONTENTS 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...
  • Page 6 NV30LT-N OPERATIONS & MAINTENANCE MANUAL TABLE OF CONTENTS 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...

  • Page 7: Release Control Record

    NV30LT-N OPERATIONS & MAINTENANCE MANUAL RELEASE CONTROL RECORD ISSUE DATE REASON 2015-03-01 Preliminary Release of NV30LT-N (NARF74/01) VERSION 0.1 2015-03-01 PAGE 3.VII...
  • Page 8 NV30LT-N OPERATIONS & MAINTENANCE MANUAL PAGE 3.VIII VERSION 0.1 2015-03-01...

  • Page 9: Description

     1-phase, **175 - 265 V ac (240 V ac nominal) : ** - The NV30LT-N’s full ac input range is 90 - 265 V ac (or 156 - 459 V ac, as applicable), but RF NOTE output power is limited when the voltage is less than 175 V ac (or 303 V ac, as applicable).
  • Page 10 NV30LT-N OPERATIONS & MAINTENANCE MANUAL DESCRIPTION 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 ...

  • Page 11: Control/Monitor Stage

    NV30LT-N OPERATIONS & MAINTENANCE MANUAL DESCRIPTION Control/Monitor Stage See electrical schematic Figure SD-4 and SD-5. The control/monitor stage performs many critical functions for the transmitter. It:  contains monitoring and protection circuits to prevent transmitter damage under adverse or fault conditions, including high speed SWR protection, high reject power protection and interlock/muting.

  • Page 12: Rf Drive Stage

    Exciter A (part of controller module A4) and B (A5, optional) are the RF drive sources for the transmitter. They accept the external audio program information (see the NV30LT-N Pre-installation Manual for details on various program input types). For dual exciter applications, the exciters’ main/standby operation is controlled locally using the front panel UI, or remotely using the web-based AUI.

  • Page 13: Rf Power Stage

    NV30LT-N OPERATIONS & MAINTENANCE MANUAL DESCRIPTION 30 kW RF Drive Splitter The 30 kW RF drive splitter (A27) contains two stages of RF drive splitting. The RF drive source (A or B) selected by relay K1 is applied to A27’s A1J1 input. The signal is first split into two inequal amplitude signals (-4.8 dB and -1.8 dB) that are 90°...
  • Page 14 NV30LT-N OPERATIONS & MAINTENANCE MANUAL DESCRIPTION Module Control/Interface PWBs See also electrical schematics Figures SD-15 through SD-22. There are three module control/interface PWBs (A3, A18 and A34). Each of them performs the following functions:  interfaces with four RF power module’s RF drive inputs.
  • Page 15 NV30LT-N OPERATIONS & MAINTENANCE MANUAL DESCRIPTION 20 kW Combiner The 20 kW combiner (A25) accepts the RF outputs from two of the three 10 kW combiner/filters (A12 and A24) and uses a 3 dB hybrid coupler to provide a single RF output. The combined (up to 20 kW) output is applied to the final 30 kW combiner (A26).
  • Page 16 NV30LT-N OPERATIONS & MAINTENANCE MANUAL DESCRIPTION 2-Input Reject Load (part of 30 kW RF Drive Splitter Assembly) The 2-input reject load on the 30 kW RF drive splitter (A27) provides a means to dissipate reject power kW Rej Ld Pwr from the other four (1 through 4) 5 outputs of the 10 kW combiner/filters’...
  • Page 17 NV30LT-N OPERATIONS & MAINTENANCE MANUAL DESCRIPTION 2-Input, Final Reject Load Assembly The 2-input, final reject load assemby (A13) provides a means to dissipate reject power from the final 20 kW Rej Ld Pwr two stages of combining the output of the 20 kW combiners’ 3 dB hybrid coupler and Final Rej Ld Pwr output of the 30 kW combiner’s 4.77 dB hybrid coupler.
  • Page 18 NV30LT-N OPERATIONS & MAINTENANCE MANUAL DESCRIPTION PAGE 3.1.10 VERSION 0.1 2015-03-01...
  • Page 19 DENOTES PWR SUPPLIES ARE SHOWN WITIHIN POWER BLOCK FOR SIMPLIFICATION. INTERFACE DENOTES FOR DUAL EXCITER SYSTEMS ONLY. B2190079 V1 DENOTES LOW VOLTAGE POWER SUPPLIES 1B, 2A & 2B ARE OPTIONAL, BEYOND THE STANDARD LVPS 1A. C/M = CONTROL/MONITORING Figure 3.1.1: NV30LT-N Transmitter Block Diagram VERSION 0.1 2015-03-01 PAGE 3.1.11...

  • Page 20: Operating The Transmitter

    NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER SECTION 3.2: OPERATING THE TRANSMITTER This section provides information about operating the NV30LT-N transmitter:  User Interface Options - see page 3.2.4 Front Panel UI - see page 3.2.4 – Front Panel Pushbuttons - see page 3.2.10 –...
  • Page 21 Network Setup - see page 3.2.90 – Email Configuration - see page 3.2.95 – Notifications - see page 3.2.97 – Nautel Phone Home - see page 3.2.99 – SNMP Configuration - see page 3.2.100 – Capturing Critical Parameters - see page 3.2.102 –...
  • Page 22 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER  Configuring Remote Inputs and Outputs - see page 3.2.145 Remote I/O Settings - Using the AUI - see page 3.2.145 – Remote I/O Settings - Using the Front Panel Display - see page 3.2.151 –...

  • Page 23: User Interface Options

    NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER User Interface Options The user can interface with the NV30LT-N using one of three methods:  Locally, using the front panel display, its navigational buttons (see Front Panel UI) and the RF On, RF...
  • Page 24 FRONT PANEL UI Top Level Main Menu (see 3.2.9) Status Screen Select Preset (see 3.2.65) Edit Presets (see Fig. 3.2.3) User Settings Set Clock (see 3.2.107) Network Settings (see 3.2.92) View Status View Alarms (see 3.2.31) Pilot Sample (see 3.2.113) View Meters (see 3.2.48) Signal Gen (see 3.2.114) View Log (see 3.2.31)
  • Page 25 FRONT PANEL UI Select Preset to RDS Settings Edit Presets Edit or Create Enable (see 3.2.72) New Preset Data Source Baud Rate Output Power (see 3.2.67) RDS Level RDS Phase PS Name Frequency (see 3.2.67) Scroll Enable Scrolling PS Main Audio Scroll Type Source (see 3.2.68)
  • Page 26 User Settings Analog Outputs Network Setup Logs (see 3.2.89) (see 3.2.23) Site Control Email Configuration Notifications Scheduler (see 3.2.159) Nautel Phone Home SNMP Configuration Local/Remote (see 3.2.17) Critical Parameters Audio Player Playlists External 10MHz (see 3.2.162) Streams Time Setup NTP Servers...
  • Page 27 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER The top level screen displays the following information:  Line 1: current time, active preset (e.g., P1) and the transmitter’s actual forward power.  Line 2: VSWR ratio and the transmitter’s reflected power level.
  • Page 28 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER LEDs There are four LEDs on the left-hand side of the LCD display that provide the operational status of various sections of the transmitter - Exciter Power Amplifier Output Network Power  (see Figure 3.2.5 on page 3.2.9).
  • Page 29 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Front Panel UI Screens Table 3.2.1 defines the available front panel display screens. Table 3.2.1: Front Panel UI Screens UI Screen Function See Page page 3.2.9 Main Menu Choose options and navigate to other screens.
  • Page 30 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Table 3.2.1: Front Panel UI Screens UI Screen Function See Page page 3.2.85 User Settings - Edit Presets - Copy the selected preset’s settings to another preset. Copy Another Preset page 3.2.107 User Settings - Set Clock Set precise time and date.
  • Page 31 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Table 3.2.1: Front Panel UI Screens UI Screen Function See Page page 3.2.169 Changeover For dual exciters, controls the auto exciter transfer function. You can also enable the standby exciter test function (local control only).
  • Page 32 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Table 3.2.1: Front Panel UI Screens UI Screen Function See Page page 3.2.140 System Settings - FM Polarity Set the polarity for FM deviation; positive modulation signal yields positive frequency deviation or negative modulating signal yields positive frequency deviation.
  • Page 33 To access the AUI, you need a PC (and a web browser) that is connected to the NV30LT-N - directly or through a switch or network - via the controller module’s (A4) rear panel LAN connection (A1J8A) or the optional remote interface PWB’s (A16) LAN connection (J1). The AUI has a wide range of displays, including: ...
  • Page 34 The top banner is permanent on all AUI pages and includes:  Nautel Logo : From any AUI page, click the Nautel logo to log out and return to the login window.  Date & Time : Displays day, month, year and current time (see Setting the Clock, on page 3.2.105).
  • Page 35 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER The bottom banner is also permanent on all AUI pages and includes:  RF On : Click to enable the transmitter’s RF power stage.  RF Off : Click to disable the transmitter’s RF power stage.
  • Page 36 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Logging in to the AUI The transmitter’s remote AUI provides a means to restrict access to transmitter control functions to authorized users only. There are four different user accounts that can be pre-defined to set access restriction between view only (no control) and full-administrative control (see “User Accounts”...
  • Page 37 Password – In the field, enter the password. Default is blank. : The Nautel AUI is factory configured with a default login username and password. Nautel NOTE recommends that you change the password to improve overall system security. See “Changing the Password”...
  • Page 38 Menu - User Settings Set network information, configure email and alarm notification page 3.2.90 parameters, configure Nautel Phone Home feature, configure SNMP parameters, capture transmitter critical parameters, configure the use of an external 10 MHz source, set the system clock and manage NTP servers.
  • Page 39 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Menu Page From the home page, click the Menu button to view the Menu page (see Figure 3.2.9). From this page, you can select one of the following sub-menus: Figure 3.2.9: Menu Page...
  • Page 40 Select User Settings to access a page that provides options for network configuration, email  configuration, alarm notifications, Nautel Phone configuration, SNMP configuration, capturing critical transmitter data, using and external 10 MHz source, setting the system date and time, and configuring NTP servers (see User Settings - AUI, on page 3.2.89).

  • Page 41: Viewing Transmitter Log

    Transmitter Alarms and Log - Using the Front Panel, on page 3.2.31). Transmitter Log - Using the AUI You can view the NV30LT-N’s events log using the AUI’s Log page - see Figure 3.2.10. This page shows a configurable log of all transmitter events. To view the page, click the Log button in the bottom banner of any AUI screen.
  • Page 42 Pressing the Log Manager button on the Logs page will provide access to this window (see Figure 3.2.12 on page 3.2.25). Refer to the NV30LT-N Troubleshooting Manual to cross-reference the alarm name to possible causes and troubleshooting tips. PAGE 3.2.24...
  • Page 43 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Understanding the Log Manager Window The Log Manager window contains the functions that edit the logs listed in the page. Press the Logs Log Manager button to open a configurable window with the following display options identified by...
  • Page 44 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Filtering Logs You can filter transmitter events based on their origin or date by pressing the button in Filter Logs the Log Manager (see Figure 3.2.13 on page 3.2.26). Press the Select a Device drop-down arrow, and select the desired device type to filter events based on the type selected.
  • Page 45 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Copying Logs Using the remote AUI only. you can create a copy of all the logs in the selected list (copied to the remote user’s computer clipboard) by pressing the Copy Logs button in the Log Manager (see Figure 3.2.14).
  • Page 46 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Deleting Logs You can delete all events or a selection of events by pressing the Delete button in the Log Manager (see Figure 3.2.15).  Delete by date - activates the calendar and clock (24-hour clock) where users can press the arrows to establish a date and time.
  • Page 47 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Viewing Log Statistics You can view statistical information on the events being displayed by pressing the Statistics button in the log manager (see Figure 3.2.16). Only events subject to the filtering parameters are displayed on the Statistics screen.
  • Page 48 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Viewing the Legend Press the Legend button in the Log Manager (see Figure 3.2.17) to display a legend that describes the symbols shown in the State and Severity columns of the Logs page. Press OK or Cancel to close this window and return to the Transmitter Log page.
  • Page 49 When you select View Status -> View Alarms or View Status -> View Log from the Main Menu (see Figure 3.2.18), you can view various active or logged events, respectively, of the NV30LT-N. These parameters are likely displayed on multiple pages and require that you scroll to view all of them.

  • Page 50: Viewing Tool Menu Panels

    Viewing Tool Menu Panels The NV30LT-N AUI provides up to seven tool menu panels (depending on purchased options) that you can choose to display on the AUI home page. Up to four tool menu panels can be displayed at one time, including a spectrum analyzer.
  • Page 51 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Click on the desired tool menu panel to display it. See Table 3.2.3 on page 3.2.33 for a description of each tool menu panel. Describing Instrument Panel Options Table 3.2.3 describes instrument panel options: Table 3.2.3: Tool Menu Panels...
  • Page 52 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Viewing Instrument Panels Each instrument panel has a menu bar that may be different from other panels (see Figure 3.2.20). Figure 3.2.20: Instrument Panel Menus Backward one step Forward one step Maximize / Minimize...
  • Page 53 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.21: Instrument Cursor Manipulation Cursor Tools to move cursor and display information Figure 3.2.22: Instrument Panel - Expansion Example Maximize/Minimize buttons VERSION 0.1 2015-03-01 PAGE 3.2.35...
  • Page 54 If these spurious emissions are observed on the spectrum analyzer, Nautel recommends that a calibrated, external spectrum analyzer be used to verify the presence of spurs.
  • Page 55 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Use the left and right buttons to make fine adjustments. Use the maximize or minimize buttons as required. Use the “peak” button to place the cursor on the next successive peak (moving left to right) in the spectrum.
  • Page 56 OPERATING THE TRANSMITTER Equalizer Screens The NV30LT-N’s exciter includes a fixed equalizer to optimize audio performance. There are three menus available in the tool panel - EQ Frequency , EQ Impulse Response and EQ Filter Delay . Coefficients are selected based on your channel frequency. All frequencies shown are relative to the channel frequency.
  • Page 57 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.26: EQ Impulse Response Time Unit is us (microseconds) EQ Impulse Response Figure 3.2.26. This panel displays the impulse response of the modulator’s EQ filter in the time domain. This is a static display tool so the screen image is not fluid and will not change.
  • Page 58 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.27: EQ Filter Delay EQ Filter Delay Figure 3.2.27. This panel displays the delay of the modulator’s EQ filter across its bandwidth. Click on the panel to display a cursor in the approximate area. The cursor position (frequency and delay) is noted in the upper, right-hand corner of the panel.
  • Page 59 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.28: Lissajous Plots L and R mode I and Q mode Lissajous Plot Figure 3.2.28. This panel displays a Lissajous plot that represents either left and right audio content or a representation of the FM modulated signal (I and Q). I and Q will be automatically selected when using MPX as the main audio source.
  • Page 60 Oscilloscope Figure 3.2.29. The NV30LT-N’s exciter includes an oscilloscope to allow monitoring of audio input parameters. The oscilloscope displays a real-time waveform for the selected audio input (e.g., L/R audio input). The audio input(s) being monitored is displayed in the upper, left-hand corner of the panel (e.g., R in green, L in blue for L/R audio input.) The limits for the amplitude axis (volts/division) and time axis...
  • Page 61 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.30: Measurement Source Settings Use the ‘stop’ button to display a snapshot of the waveform for analysis, printing, etc. Use the ‘play’ button to resume the live, real-time display of the waveform.

  • Page 62: Viewing Real-Time Meters

    NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Viewing Real-Time Meters You can view meters using the AUI (see Viewing Real-Time Meters - using the AUI, on page 3.2.44) or using the front panel UI (see Viewing Real-Time Meters - Front Panel, on page 3.2.48).
  • Page 63 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Describing the Meter Display The meters displayed in the AUI represent the active meters selected for display. Each meter is a colour- coded bar with minimum and maximum values (see Figure 3.2.32). The current value for a meter is indicated by an arrow on the colour-coded bar, as well as a numeric value below the meter.
  • Page 64 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Identifying Meter Information on a Specific Sub-device Open the Meters List View window and select one of the desired transmitter sub-devices.  Controller  Exciter A or B  Rack - Multiple racks supported ...
  • Page 65 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Saving a Meter List : Meter lists are associated with user accounts. Lists saved in this screen are only displayed in the NOTE current user account. Setting a list as default will define the meters that will appear when logging into the current account (or after an ac power interruption in the local AUI if this is the default user account).
  • Page 66 Figure 3.2.35) you can view various metered parameters of the NV30LT-N. These parameters are divided into sections. When you select a particular section, the applicable meters are displayed as a list on the appropriate screen. : The View Meters screens are for viewing purposes only and do not offer the same level of NOTE analytical features as the AUI’s Meter List View page (see...
  • Page 67 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Controller: RMS Forward Power +1.2V Reject 9-12 Power, as applicable Reflected Power RF Drive Power Reject 13-16 Power, as applicable VSWR RF Drive A Reject 1-8 Power, as applicable DC Power In...
  • Page 68 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Rack # (1 through 8, as applicable): Rk +15V Rk Ambient Temperature Rk Fan 3 Speed, as applicable Rk +5V Rk Reject Fan Voltage Rk Fan 4 Speed, as applicable Rk +3.3V...

  • Page 69: Presets - Editing Operational Settings

    NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Presets - Editing Operational Settings You can manage presets using the remote AUI (see Managing Presets - Using the AUI) or using the local front panel display (see Managing Presets - Using the Front Panel, on page 3.2.65).
  • Page 70 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Editing or Creating Presets When a presets page is opened from the menu, (for example see Figure 3.2.36 on page 3.2.51), the Current Settings of the transmitter are displayed. They define the current operational state of the transmitter.
  • Page 71 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Loading Presets When first entering the Presets page, the current “active” preset is displayed (see Figure 3.2.36 on page 3.2.51). If the current preset is not the desired one, use the Load button on the left-side of the AUI to call up a window containing a list of available presets.
  • Page 72 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Understanding the Preset Tabs The Presets page consists of tabs across the top with functions on the left-side and parameters displayed in the center and right-side of the window. A separate display appears for each of the...
  • Page 73 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.38: Presets page - Main Audio tab VERSION 0.1 2015-03-01 PAGE 3.2.55...
  • Page 74 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Main Audio - (see Figure 3.2.38 on page 3.2.55  Audio Source : Connects the appropriate exciter input for use. Available options are:  Analog Left/Right: this source allows for further configuration via Analog Level, Audio Mode (Mono L+R, Mono L, Mono R, Stereo), 15kHz Lowpass, Preemphasis, Main Audio Gain Adjust settings (see below).
  • Page 75 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.39: Presets - SCA SCA - (see Figure 3.2.39  MPX SCA: Connector (J7:A for SCA1, J7:B for SCA2) for use with an externally generated SCA; select Enabled or Disabled. When enabled, all the selections listed below are active.
  • Page 76 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER  Internal SCA1/2: Enable or disable the appropriate internal SCA (SCA1 or SCA2). When enabled, the settings listed below are active for the associated SCA signal (1 or 2). SCA1 or SCA2 Injection Level: enter value between 0 and 20% (typically 10%); this level is ...
  • Page 77 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.40: Presets page - RDS tab (upper and lower sections) UPPER SECTION LOWER SECTION Refer to FCC guidelines for allowable modulation depth with SCAs or RDS enabled. NOTE VERSION 0.1 2015-03-01...
  • Page 78  Data Source: select Internal, Ext. ASCII, Ext. UECP, ASCII Over IP, UECP Over IP. : For ASCII over IP data, send RDS information to the IP address of the NV30LT-N, port 7005. NOTE ...
  • Page 79 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER  Radio Text: Most RDS radios can receive short messages that may include information about the presenter, station or program you are listening to. (e.g., a web address for the station). You can enter a radio text up to 64 characters scroll. This selection applies to internal data sources only.
  • Page 80 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.41: Presets page - Other Settings tab (upper, middle and lower sections) UPPER SECTION MIDDLE SECTION LOWER SECTION PAGE 3.2.62 VERSION 0.1 2015-03-01...
  • Page 81 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Other Settings - (see Figure 3.2.41  Other Settings: Provides the following sub-functionality:  Pilot Level: enter value between 6 and 12 % (typically 9 %). This level is added to the composite baseband signal.
  • Page 82 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER  AGC Limiter: select Enabled, then enter AGC Limit percentage (allowable range is 0-160%, defaulted to 120%) and Time Constant (allowable range is 0-1000 ms, defaulted to 0 ms). If Enabled, when the modulation level exceeds the AGC Limit, the gain of the audio input will instantly decrease in order to reduce the modulation level below the AGC limit threshold.
  • Page 83 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Managing Presets - Using the Front Panel The Select Presets screen (see Figure 3.2.42) and Edit Presets screen (see Figure 3.2.43) allow users to view operational data (power level, frequency, mode, program input characteristics), plus create and control preset settings.
  • Page 84 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.44: Create New Preset screen Figure 3.2.45: Preset Editing menu Within the Preset Editing menu, use the up and down buttons to scroll through the options and press the accept (checkmark) button to enter the selected editing menu/screen. Press the cancel ( X ) button to return to the previous menu.
  • Page 85 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Output Power Figure 3.2.46 on page 3.2.67. Use the up and down buttons to edit the output power (in 50 W increments, then press the accept (checkmark) button to save the change.
  • Page 86 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Main Audio When you select Main Audio from the Preset editing options screen, you can edit various main audio parameters (see Figure 3.2.48). Figure 3.2.48: Main Audio menu Use the up and down buttons to scroll through the main audio menu options, then press the accept (checkmark) or right arrow button to enter the selected editing screen.
  • Page 87 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.49: Main Audio editing screens Use the up and down buttons to locate the desired audio source - AES, MPX, Analog L/R or Audio Player, then press the accept (checkmark) button to save the change.
  • Page 88 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.50: Input Levels editing screens Use the up and down buttons to select a level between -12 and 12 dBu (in 0.1 dBu increments) then press the accept (checkmark) button to save the change. Press the cancel (X) button to discard changes and return to the previous menu.
  • Page 89 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Pilot Settings When you select Pilot Settings from the Preset editing options screen, you can edit the settings of the pilot signal (see Figure 3.2.52). Figure 3.2.52: Pilot Settings menu Use the up and down buttons to move the cursor to the desired pilot setting and then press the right button to enable editing of the parameter.
  • Page 90 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER SCA Settings When you select SCA Settings from the Preset editing options screen, you can edit various SCA parameters (see Figure 3.2.54). Figure 3.2.54: SCA Settings menu Use the up and down buttons to move the cursor to the desired SCA setting and then press the right button to enable editing of the parameter.
  • Page 91 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.56: Internal SCA1 and SCA2 editing screens Use the up and down buttons to select ON or OFF, then press the accept (checkmark) button to save the change. Press the cancel (X) button to discard changes and return to the previ- ous menu.
  • Page 92 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER RDS Settings When you select RDS Settings from the Preset editing options screen, you can edit various RDS parameters (see Figure 3.2.57). Figure 3.2.57: RDS Settings menu Use the up and down buttons to move the cursor to the desired RDS setting and then press the right button to enable editing of the parameter.
  • Page 93 Default setting is UECP. NOTE For an ASCII Over IP data source, RDS information should be sent to the IP address of the NV30LT-N, port 7005. NOTE For title/artist functionality, the NV30LT-N supports the radiotext (RT) data type, using the UECP or Ext.
  • Page 94 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.59: RDS Settings editing screens (2 of 3) Use the up and down arrows to select Off, Fast or Slow, then press the accept (checkmark) button to save the change. Press the cancel (X) button to discard changes and return to the previous menu.
  • Page 95 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.60: RDS Settings editing screens (3 of 3) Use the up and down arrows to select Music or Speech, then press the accept (checkmark) button to save the change. Press the cancel (X) button to discard changes and return to the previous menu.
  • Page 96 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.61: DI Code editing screens Use the up and down arrows to select ON or OFF, then press the accept (checkmark) button to save the change. Press the cancel (X) button to discard changes and return to the previ- ous menu.
  • Page 97 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Limiter Settings When you select Limiter Settings from the Preset editing options screen, you can edit various limiter parameters (see Figure 3.2.63). Figure 3.2.63: Limiter Settings menu Use the up and down buttons to move the cursor to the desired limiter and then press the right button to enter the associated sub-menu for: ...
  • Page 98 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.64: Hard Limiter sub-menu and editing screens Use the up and down arrows to select ON or OFF, then press the accept (checkmark) button to save the change. Press the cancel (X) button to discard changes and return to the previ- ous menu.
  • Page 99 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.66: 2-Slope Limiter sub-menu and editing screens Use the up and down arrows to select ON or OFF, then press the accept (checkmark) button to save the change. Press the cancel (X) button to discard changes and return to the previ- ous menu.
  • Page 100 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.67: L/R Limiter sub-menu and editing screens Use the up and down arrows to select ON or OFF, then press the accept (checkmark) button to save the change. Press the cancel (X) button to discard changes and return to the previ- ous menu.
  • Page 101 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.68: MPX RMS Limiter sub-menu and editing screens Use the up and down arrows to select ON or OFF, then press the accept (checkmark) button to save the change. Press the cancel (X) button to discard changes and return to the previ- ous menu.
  • Page 102 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.70: Mod Loss editing screens Determines whether the audio loss feature is used. Use the up and down arrows to select ON (enable) or OFF (disable), then press the accept (checkmark) button to save the change.
  • Page 103 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Audio Delay When you select Audio Delay from the Preset editing options screen, you can edit or disable the audio delay period (see Figure 3.2.71). Figure 3.2.71: Audio Delay menu Use the up and down buttons to change the audio delay setting between disabled (= 0 s) and any time period to a maximum of 13 seconds (in 1 us steps), then press the accept (checkmark) button to save the change.

  • Page 104: Resetting Alarms

    NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Resetting Alarms You can attempt to reset any latching transmitter alarms that are holding the transmitter in an “off-air” state using the remote AUI’s Reset button (see page 3.2.17) or using the local front panel display (see Resetting Alarms - Using the Front Panel).

  • Page 105: Viewing Transmitter Status - Aui

    NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Viewing Transmitter Status - AUI You can view the NV30LT-N’s operational status using the AUI’s Transmitter Status page - see Figure 3.2.74. This page shows current active alarms to aid in fault diagnosis. To view the...
  • Page 106 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Viewing Alarm Details Transmitter Status page - see Figure 3.2.74 page 3.2.87 displays a table that lists the active alarm details under the following columns:  Device - identifies the alarms by their originating device (e.g., Controller, Exciter A, Rack, etc.) ...

  • Page 107: User Settings - Aui

    NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER User Settings - AUI The User Settings page (see Figure 3.2.76 on page 3.2.90) allows operators to modify various custom user settings such as network and email notifications. To view the User Settings page, select User Settings from the Menu options.
  • Page 108 UI) to ensure you can log in after changes have been made. Determining DHCP Setting One of the main decisions in configuring the network connection on your NV30LT-N transmitter is whether you set DHCP to ON or OFF . If you are connecting to a network, consult with a network administrator before connecting the transmitter to your network to determine whether to enable (turn ON ) or disable (turn OFF ) the DHCP setting.
  • Page 109 (checkmark) button to save the change. Press the cancel ( X ) button to discard changes and return to the previous menu. A nameserver (also called a DNS) translates a host name (e.g., mail.nautel.com) to an IP address NOTE:...
  • Page 110 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.77: Network Settings screens All addresses shown are for reference purposes only Displays a number that serves as unique network adapter identifier. This is set by the manufacturer and is displayed for informational purposes only (cannot be user set).
  • Page 111 OPERATING THE TRANSMITTER Connecting a Laptop Directly to the Transmitter If connecting to the NV30LT-N directly with a laptop, you must set a static IP address on the NV30LT-N and your laptop. From the front panel UI’s Main Menu , go to User Settings -> Network Settings and set the IP address as follows: ...
  • Page 112 Figure 3.2.77 on page 3.2.92 for detailed descriptions of each field. By entering the NV30LT-N’s established IP address into an Internet browser’s address bar, and then logging into the AUI, you can view and edit the network parameters (see Figure 3.2.76 on page 3.2.90).
  • Page 113 3.2.79) allows you to configure email parameters (e.g., email server and port number), and is required if the notification feature is used (see Notifications, on page 3.2.97). : Nautel recommends that the following settings be entered/vetted by a qualified Network NOTE Administrator. Figure 3.2.79: Email Configuration page To configure the email feature, perform the following steps: Open the User Settings page by clicking Menu ->...
  • Page 114 Enter the following parameters:  Email Server : The outgoing mail server. Enter the server name or IP address here. In order to enter a server name (e.g., mail.nautel.com), at least one nameserver IP address must be entered (see Network Setup, on page 3.2.90).
  • Page 115 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Notifications The Notifications feature (see Figure 3.2.80) provides a means for the transmitter to issue emails triggered by user defined alarm events. If you use this feature, you must also configure an email (see Email Configuration, on page 3.2.95).
  • Page 116 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.81: Notifications adding/updating page PAGE 3.2.98 VERSION 0.1 2015-03-01...
  • Page 117 This data includes logs, alarms and meter readings which are then stored in a database and can be analyzed by Nautel staff if an alarm is reported by the transmitter. Since all data is pushed out to Nautel by the transmitter to the cloud, there is no need to reconfigure your firewall and potentially compromise your transmitters security.

  • Page 118: Snmp Configuration

    NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER SNMP Configuration The SNMP configuration page (see Figure 3.2.83) provides a means to configure the SNMP agent and associated traps. Figure 3.2.83: SNMP Configuration page - Agent tab shown Agent Settings Using the Agent tab (see Figure 3.2.83), you can configure the SNMP agent as follows:...
  • Page 119 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER  Trap Receiver IP : Enter the IP address of the computer to which the SNMP agent will send trap notifications. The computer must be running an SNMP application that is configured to receive traps.
  • Page 120 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Capturing Critical Parameters You can capture critical parameter data for the transmitter’s current state using the AUI’s Critical Parameters page (see Figure 3.2.85). To view this page, select Critical Parameters from the User Settings page.
  • Page 121 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Using an External 10 MHz Input You can configure the NV30LT-N to accept an external 10 MHz input using the remote AUI (see External 10 MHz Input - Using the AUI) or using the local front panel display (see...
  • Page 122 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER External 10 MHz Input - Using the Front Panel To view the enable/disable screen for the external 10 MHz input (see Figure 3.2.87), select User Settings -> Ext. 10 MHz Inp from the Main Menu .
  • Page 123 Setting the Clock - Using the AUI You can remotely set the NV30LT-N’s time and date using the AUI’s Time Setup page (see Figure 3.2.88) by selecting Time Setup from the User Settings options. The date and time setting is displayed in the upper, left corner of the AUI.
  • Page 124 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER The Time Setup option allows users to set the exact time and date information as well as regional and timezone settings for a transmitter location. Set the time and date as follows: Select the Time Setup option from the left-side of the User Settings page to open a related window on the right-side of the page.
  • Page 125 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Setting the Clock - Using the Front Panel When you select User Settings -> Set Clock from the Main Menu (see Figure 3.2.89) you can set the current time and date. The time appears on the top line of the top level screen (see Figure 3.2.1 on page...
  • Page 126 3.2.108). You can configure one or more NTP (Network Time Protocol) servers to allow clock synchronization with all computers on the same network as the NV30LT-N. To view the AUI’s NTP Servers page (see Figure 3.2.90), selecting NTP Servers from the User Settings options. There are several functions available on this page - enabling NTP, monitoring NTP server status and managing servers.
  • Page 127 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Monitoring NTP Servers The NTP Server Status section displays tabular information on the NTP servers connected to the network. The table includes remote name, IP address, delay, offset and jitter.  Remote Name: Displays the host name of the referenced time source. An asterisk (*) in the first column marks the reference time source that is currently preferred by the NTP daemon.
  • Page 128 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Setting Call Sign/ID You can set a name that identifies the transmitter on the AUI. To view the AUI’s Call Sign/ID page (see Figure 3.2.92), select Call Sign/ID from the User Settings options. This identification will be displayed...
  • Page 129 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Turn-On Behaviour The Turn-On Behaviour page (see Figure 3.2.93) allows users to delay the start-up (RF on) of the transmitter when recovering from an ac power loss, in order to limit the simultaneous power demand from multiple transmitters on a common generator by staggering their turn on sequence.

  • Page 130: User Settings - Front Panel Ui

    NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER User Settings - Front Panel UI You can establish various user settings for the NV30LT-N using the local front panel display. The following options are available:  Edit Presets: see Managing Presets - Using the Front Panel, on page 3.2.65 ...
  • Page 131 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Setting Pilot Sample Level : Setting the pilot sample is only available using the front panel display. NOTE From the front panel UI, you can set the level of the pilot sample that is applied to the PILOT SAMPLE OUT (A1J4A) BNC connector on the rear of the controller (A4).
  • Page 132 : The test signal generator function is only available using the front panel display. NOTE From the front panel UI, you can configure the test signal generator output of the NV30LT-N. Note that a different menu will appear depending on the currently configured test signal type. To view the Signal Gen screen, select User Settings ->...
  • Page 133 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.96: Signal Generator Editing Screens Select ON (enabled) or OFF (disabled). Press the cancel (X) button to discard changes and return to the previous menu. Default is OFF. Select a type - None, Sine Wave, Sine Sweep or Bandlimited Noise.
  • Page 134 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Selecting FM Mask : FM Mask selection is only available using the front panel display. NOTE From the front panel UI, you can select the appropriate FM mask standard (FCC, ETSI or None) being used by the analyzer on the AUI.
  • Page 135 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Setting Low Audio Thresholds : Low audio threshold and timeout settings are only available using the front panel display. NOTE From the front panel UI, you can establish the low audio thresholds and timeout delays for the main audio and SCAs.
  • Page 136 : Low forward power threshold settings are only available using the front panel display. NOTE From the front panel UI, you can establish the low forward power thresholds for the NV30LT-N. There are two thresholds available - low power and very low power. To view the Fwd Low menu, select User Settings ->...
  • Page 137 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Turn-On Delay Setting : The turn-on delay setting can also be adjusted using the remote AUI (see Turn-On Behaviour, on NOTE page 3.2.111). From the front panel UI, you can set the transmitter’s turn-on delay. This setting determines the time delay for the transmitter to recover from an ac power loss.
  • Page 138 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.103: Ramp-up Speed Screen Use the up and down buttons to select a ramp-up speed between 1 and 100% (in 1% increments), noting 100% represents approximately seven seconds (0 W to full power). The default setting is 100%.

  • Page 139: User Accounts

    First-Time Login, on page 3.2.124 Figure 3.2.104: User Accounts page The NV30LT-N contains a default user account when it leaves the factory. This account appears as Nautel (Auto) in the List of Users and has Administrator permission level. The default Username is “Nautel”.
  • Page 140 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Setting User Permission Level There are four levels of permission that can be assigned to users, each with their own specific function. All users have permission to change their own username and password, but are otherwise limited to the following functions: ...
  • Page 141 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Changing the Password To change your password, click the Change Password button. A menu appears that prompts you to enter the old password, new password and confirmation of the new password. Click Apply to save or Cancel to exit this menu (see Figure 3.2.105 on page...
  • Page 142 When you enter the User Accounts page for the first time, it is recommended you create an account and then delete the default Nautel account, as follows: Login to the AUI using the default Username (“Nautel”) and Password (blank). Set up your own Administrator account, with your desired Username and Password.

  • Page 143: System Settings

    NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER System Settings Users can determine critical system configuration parameters using the AUI (see System Settings - using AUI) or using the front panel UI (see System Settings - using the Front Panel UI, on page 3.2.130)
  • Page 144 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Reboot The Reboot page (see Figure 3.2.107) allows users to reboot three items - the AUI, the active exciter and the standby exciter (if installed). Figure 3.2.107: Reboot page  To reboot the AUI, click the Reboot AUI button. This will function with remote control enabled or disabled.
  • Page 145 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Upgrade Software The Upgrade Software page (see Figure 3.2.108) allows for uploading a suite of software upgrade files (.tgz files) via remote connection. Navigate the page as described below. For additional information on...
  • Page 146 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Exciter TCXO The Exciter TCXO page (see Figure 3.2.109) allows users to calibrate the internal clock to a user supplied external high precision 10 MHz clock reference (e.g. GPS synchronized 10 MHz clock). Once this external 10 MHz clock reference is connected, the 10MHz Int-Ext Offset field will display the difference between the internal and external frequencies (in ppm).
  • Page 147 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Audio Input Calibration : Audio inputs are factory set using a high accuracy source and do not typically require user NOTE adjustment. Changes to factory calibrations could cause low or excessive modulation and non- compliance to strict regulatory limits.
  • Page 148 : Changing selections in the front panel UI’s System Settings -> Console Select menu or the NOTE Factory Settings menu is not normally required, and should only be performed by trained personnel. Information on these sub-menus is not included in the manual. Contact Nautel for assistance. PAGE 3.2.130 VERSION 0.1 2015-03-01...
  • Page 149 From the front panel UI, you can perform a recovery reset of the operating system (OS). You will also need to install a flash drive, provided by Nautel, in one of the two USB ports on the rear of the controller module (A4).
  • Page 150 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Configuring Host Watchdog : Host watchdog configuration is only available using the front panel display. NOTE From the front panel UI, you can enable or disable the host watchdog feature. This feature, when enabled, monitors communication between the host processor and the DSP processor on the exciter/ control PWB within the controller module.
  • Page 151 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Adjusting Display Settings : Front panel display settings are only available using the front panel display. NOTE From the front panel, you can configure the LCD display’s contrast, brightness and backlight settings. To view the LCD Settings screen, select User Settings ->...
  • Page 152 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.116: LCD Settings Editing Screens Select a value between 50 (lighter contrast) and 200 (darker contrast) (in increments of 5). Press the cancel (X) button to discard changes and return to the previous menu. Default setting is 100.
  • Page 153 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Setting Exciter TCXO Offset : You can also adjust the exciter TCXO offset value using the AUI (see Exciter TCXO, on page NOTE 3.2.128). To view the front panel UI’s Exc TCXO screens (see Figure 3.2.117), select System Settings ->...
  • Page 154 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Configuring Installed Hardware : Hardware configuration settings are only available using the front panel display. NOTE From the front panel UI, you can configure the transmitter for any installed hardware that has optional variations (e..g, quantity of exciters or LVPS modules, fan speed) or is non-standard (e.g., UPS or audio...
  • Page 155 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Installed Exciter From the front panel UI, you can configure the transmitter for the number of installed exciters. If you have upgraded your transmitter to dual exciters, you may have already been prompted to change this configuration.
  • Page 156 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER LVPS Voltage From the front panel UI, you can set the default LVPS voltage. The transmitter will set the LVPS voltage to this value (between 35 and 53 V, in 1 V steps) during normal operation. Under fault conditions, if the LVPS voltage requires an increase, the control system automatically increases the LVPS voltage, then decreases it back to the set value when the fault condition clears.
  • Page 157 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.122: Fan Speed Screen Use the up and down buttons to select a value between 63 and 100 %. The default setting is 63%, which corresponds to approximately 31 V for the related fan voltage. A setting of 100% corresponds to approximately 48 V for the related fan voltage.
  • Page 158 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER FM Polarity : Adjusting FM polarity is used to synchronize transmitters for a single-frequency network. It NOTE determines whether positive audio input results in positive or negative modulation. This feature is only available using the front panel UI.
  • Page 159 Changing values in the System Settings -> Factory Settings menu is not normally required, and should only be performed by trained personnel. Information on some of these sub-menus is not included in the manual. Contact Nautel for assistance. From the front panel UI, you can adjust various factory settings such as critical parameter thresholds, calibration values, exciter power level, etc.
  • Page 160 WARNING! Threshold settings are established at the factory and should not require any adjustment. These settings affect critical system protection circuits. Making changes to these settings may void your warranty. Contact Nautel before making changes. From the front panel UI, you can set alarm thresholds for critical parameters. To view the Thresholds...
  • Page 161 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Calibration : Most of the Calibration settings are only available using the front panel UI. Calibration of audio NOTE related parameters (see Figure 3.2.127) can also be performed using the AUI (see...
  • Page 162 : Forward power (Fwd Cal), reflected power (Refld Cal), RF Drive, exciter forward (Exc Fwd) and NOTE exciter reflected (Exc Rfld) calibrations are performed at the factory and should not require user adjustment. Contact Nautel for assistance, if necessary. Exciter Power : The exciter power setting is only available using the front panel UI.

  • Page 163: Configuring Remote Inputs And Outputs

    Remote I/O Settings - Using the Front Panel Display, on page 3.2.151). Refer also to the NV30LT-N Pre-installation Manual for information on remote inputs and outputs and their factory default settings. Remote I/O Settings - Using the AUI To view the Remote I/O page (see Figure 3.2.129), select Remote I/O from the Menu options.
  • Page 164 That setting can only be made by a local user using the front panel UI. Nautel sets digital input defaults prior to shipping. See the Pre-installation Manual for details.
  • Page 165 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.130: Select a Remote (input) window Configure Input Control Logic - AUI You can configure the active/inactive control logic for each of the 10 digital inputs. Click the existing Logic bar to display the applicable drop-down menu options, which may include: ...
  • Page 166 3.2.148, you can configure up to 16 digital outputs that indicate either the presence of various alarms or the status of operator controlled circuits. Nautel sets digital output defaults prior to shipping. See the NV30LT-N Pre-installation Manual for details. Figure 3.2.131: Remote I/O Page - Remote Outputs tab selected Select the desired digital output (1 through 16) from the list.
  • Page 167  Various Alarms . The active logic level indicates that the selected alarm is occurring. Any transmitter alarm can be selected as a digital output. Refer to the NV30LT-N Troubleshooting Manual for a description of each alarm. Audio Active . The selected output (MPX, AES 1, AES 2 or L/R) will be a logic low when the ...
  • Page 168 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Configure Output Logic - AUI You can configure the active/inactive logic for each of the 16 digital outputs. Click the existing Logic bar to display the applicable drop-down menu options. Some digital output default examples: If the selected channel is RF On/Off , the drop-down options are: ...
  • Page 169 Unless otherwise noted, these inputs are only accepted by the transmitter if remote control is enabled. That setting can only be made by a local user using the front panel UI. Nautel sets digital input defaults prior to shipping. See the NV30LT-N Pre-installation Manual for details.
  • Page 170 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.134: Remote Inputs Screens (Input 1 shown) Use the up and down buttons to select the desired digital input (1 through 10) from the list. Each screen shows the current digital input parameter (e.g., RF On/Off), as well as the polarity (e.g., Falling edge RF On) and current state (e.g., high, low) of the corresponding input pin.
  • Page 171 Nautel sets digital output defaults prior to shipping. See the NV30LT-N Pre-installation Manual for details. Figure 3.2.135: Remote Outputs Screens (Output 1 shown) Use the up and down buttons to select the desired digital output (1 through 16) from the list.
  • Page 172 UI (see Analog Outputs - Front Panel). Nautel sets analog output defaults prior to shipping. There are no user configuration options. They are for monitoring purposes only. See the NV30LT-N Pre-installation Manual for details. Analog Outputs - AUI...
  • Page 173 3.2.152), you can view the levels of four pre-defined analog outputs that are representative of critical transmitter parameters. Nautel sets analog output defaults prior to shipping. There are no configuration options. They are for monitoring purposes only. See the NV30LT-N Pre-installation Manual for details.
  • Page 174 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Site Control Settings You can use the remote AUI’s Site Control page (see Figure 3.2.138) to locally or remotely configure remote inputs and outputs for use with external site control equipment (air conditioner, etc.). This page allows the user to create and configure custom digital inputs and outputs and assign them for use using the Remote Inputs and Remote Outputs pages.
  • Page 175 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.139: Site Control Rule Editing Window  In the Name section, enter a name for the rule. This will display on the Site Control page, as well the Logs page, when triggered.
  • Page 176 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER  In the Input section, use the drop-down menu to select the desired input (alarm, status or custom input) that will affect the rule. Note that a second input may also be selected in conjunction with a logic operation if the Operator section contains the AND, OR or XOR function.

  • Page 177: Preset Scheduler

    NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Preset Scheduler If the scheduler is enabled (see Enabling the Scheduler on page 3.2.161), you can program a yearly preset schedule for the transmitter. Use the Scheduler page (see Figure 3.2.140) to set the dates and times at which presets take effect.
  • Page 178 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.141: Rule Explorer window When you click in the Rules list, you have the option to edit or delete an existing rule, or to create a new rule. Click the New or Edit button to display the Rule Explorer window (see Figure 3.2.141).
  • Page 179 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Enabling the Scheduler You can enable or disable the scheduler using the remote AUI (see Enabling the Scheduler - AUI) or using the local front panel display (see Enabling the Scheduler - Front Panel).

  • Page 180: Audio Player

    NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Audio Player The built-in audio player (see Figure 3.2.144) can use a file playlist, Livewire or Shoutcast as an audio source. These sources must be configured before they can be used. This section describes how to configure audio player sources.
  • Page 181 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Playlist The Playlist tab (see Figure 3.2.144) displays the audio files and sequence that currently make up the playlist. Only audio files that are supported (e.g., .wav or .mp3 files) will be played. For .mp3 files, using files with bit rates equal to or less than 96 kbps achieves best audio results.
  • Page 182 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER The Playlist Contents section is used for inserting jumps ( Insert JMP button) and deleting playlist contents ( Delete button). The Insert JMP button allows the user to set up a playlist that can jump to an item in another playlist.
  • Page 183 Figure 3.2.146: Audio Player page - Streams tab Streams The NV30LT-N is capable of playing audio streams in either Shoutcast or Livewire format. The audio player supports Shoutcast playlists and IP addresses for audio streams. For a Shoutcast playlist enter the URL for the station. For an audio stream, enter the URL for that stream.
  • Page 184 3.2.147). Enter the appropriate information for the audio server (Name and URL for Shoutcast; Name and Channel for Livewire). Make sure the NV30LT-N can access the location. Click OK to add the audio stream or click Cancel to discard changes.
  • Page 185 If you are editing an audio stream, enter the appropriate information for the audio server (Name and URL for Shoutcast; Name and Channel for Livewire). Make sure the NV30LT-N can access the location. Click OK to either edit or delete the audio stream, or click Cancel to discard changes.

  • Page 186: Changing Exciter Transfer Settings

    For Auto Changeover Enabled , select Yes if automatic changeover is desired or No if user selected/manual changeover is desired. : If the standby exciter must be removed for service, Nautel recommends you set Auto Changeover NOTE Enabled to No while the standby exciter is unavailable for operation, instead of temporarily setting Standby Exciter to No .
  • Page 187 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER  For Standby Exciter (appears when dual exciters are installed), select Yes if standby operation is available or desired or No if standby operation is not available or not desired. This is factory set and does not typically require adjustment.
  • Page 188 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.150: Changeover Editing Screens For display only. Indicates the active exciter - Ctrl/Exc A or Exciter B. Press the cancel (X) button to return to the previous menu. Allows user to set the transmitter’s main exciter to Ctrl/Exc A or Exciter B.

  • Page 189: Enabling And Operating The Orban Audio Processor

    If a discrepancy exists between the operational instructions in the Orban manual and this document, the latter shall prevail as this document is specific to operation with an NV30LT-N transmitter. View the Orban Optimod-FM 5500 Digital Audio Processor Operating Manual online at: ftp://ftp.orban.com/5500/Documentation/...
  • Page 190 : Audio processor configuration is only available using the front panel display. NOTE Configure the NV30LT-N to recognize the presence of the Orban card using the front panel UI as follows: With the transmitter turned on and in local mode of operation, navigate to the front panel UI's Main Menu ->...
  • Page 191 Inside card is selected; however the other limiters (hard limiter, AGC limiter, 2-slope limiter) remain active. Nautel recommends that you set the thresholds for these other limiters high enough to ensure the signal is unaffected. These other limiters remain as a last resort to prevent over-modulation.
  • Page 192 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.152: Enabling the Orban Audio Processor - Front Panel UI PAGE 3.2.174 VERSION 0.1 2015-03-01...
  • Page 193 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Orban Enabling - Using the Remote AUI With the transmitter turned on, connected to a remote monitoring PC or laptop and in remote mode of operation, navigate to the AUI's Main Menu -> Presets page.
  • Page 194 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Selecting an Orban Audio Processor Preset Select an Orban audio processor preset using either the front panel UI (see Selecting an Orban Preset - Using the Front Panel) or the remotely accessed AUI (see...
  • Page 195 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Selecting an Orban Preset - Using the Remote AUI From the AUI's Main Menu -> Presets page, click on the Other Settings tab (see Figure 3.2.155). From the Orban Preset drop-down list, select the desired Orban preset (e.g., ROCK-LOUD, etc).
  • Page 196 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Managing an Orban Audio Processor Preset Orban presets contain many audio processing settings, including stereo enhancement, AGC, EQ, final clipping and distortion. From the remote AUI (not available from the front panel UI), you can create Orban presets, manage their various settings and save the preset settings to a text file.
  • Page 197 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.157: Audio Processor Menu - Less More tab shown Current Setting Slider bar (green section) Adjustment Buttons VERSION 0.1 2015-03-01 PAGE 3.2.179...
  • Page 198 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Loading and Saving Orban Presets The left-hand side of the Audio Processor pages has four buttons (see below). When you first enter the Audio Processor page, the current preset is displayed. If the current preset is not the preset you want to work with, press the Load button to call up a window containing a list of alternate presets.
  • Page 199 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Tab Sections The following tabs (and referenced Figure numbers) are available on the Audio Processor page. Each provides specific control functions for the selected preset. Refer to the Orban Optimod 5500 manual for details on these settings.
  • Page 200 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.159: Audio Processor Menu - Stereo Enhancer tab Figure 3.2.160: Audio Processor Menu - AGC tab PAGE 3.2.182 VERSION 0.1 2015-03-01...
  • Page 201 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.161: Audio Processor Menu - EQ tab Figure 3.2.162: Audio Processor Menu - Final Clipping tab VERSION 0.1 2015-03-01 PAGE 3.2.183...
  • Page 202 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.163: Audio Processor Menu - Multiband tab Figure 3.2.164: Audio Processor Menu - Compressors tab PAGE 3.2.184 VERSION 0.1 2015-03-01...
  • Page 203 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.165: Audio Processor Menu - Bandmix tab Figure 3.2.166: Audio Processor Menu - Distortion tab VERSION 0.1 2015-03-01 PAGE 3.2.185...
  • Page 204 NV30LT-N OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER PAGE 3.2.186 VERSION 0.1 2015-03-01...

  • Page 205: Routine Maintenance

    NV30LT-N OPERATIONS & MAINTENANCE MANUAL ROUTINE MAINTENANCE SECTION 3.3: ROUTINE MAINTENANCE This section provides instructions for performing routine maintenance on the NV30LT-N transmitter. This section includes the following topics:  Scheduled Maintenance  Cleaning  Checking Hardware - see page 3.3.2 ...

  • Page 206: Battery Replacement

    Never use compressed air to clean the NV30LT-N. Checking Hardware All hardware must be checked at least once a year. Thermal cycling from turning the NV30LT-N on and off will require more frequent checks. ...

  • Page 207: Replacing An Air Filter

    Take the following steps to replace an NV30LT-N air filter: Order a new filter or filters, as necessary. You can order a standard sized filter from Nautel (Nautel Part # HR140 or HR147) or from the manufacturer (standard size 15” x 24” x 2” or 12” x 24” x 2”, American Air Filter PerfectPleat HC M8 MERV 8 or equivalent;...
  • Page 208 NV30LT-N OPERATIONS & MAINTENANCE MANUAL ROUTINE MAINTENANCE Figure 3.3.1: Replacing Air Filters Quarter-turn fasteners to remove each front panel FRONT Air flow direction Air flow direction Filter Bracket 4 quarter-turn Bracket Filter 4 quarter-turn fasteners to remove fasteners to each filter bracket...

  • Page 209: Performing On-Air Checks

    Use the transmitter’s AUI to compare current transmitter settings with those on the Critical Parameters sheet. : Nautel completes the Critical Parameters sheet with the transmitter terminated into a precision NOTE 50 ohm load. Measurements made on site into a dummy load or station antenna may not yield the same readings.

  • Page 210: Replacing The Controller Assembly's Battery

    Interval Every 12 months. Parts and Tools Replacement battery: 3 V lithium coin cell, 20 mm (Nautel Part # BBLT01, Panasonic # CR2032). Procedure Perform the following steps to replace the battery: Ensure ac power to the transmitter is turned off or disabled.
  • Page 211 NV30LT-N OPERATIONS & MAINTENANCE MANUAL ROUTINE MAINTENANCE Figure 3.3.2: Replacing Controller Battery Battery A8BT1 CONTROLLER ASSEMBLY Partial rear view (filter panels removed) VERSION 0.1 2015-03-01 PAGE 3.3.7...

  • Page 212: Removing The Exciter's Battery

    NV30LT-N OPERATIONS & MAINTENANCE MANUAL ROUTINE MAINTENANCE Removing the Exciter’s Battery Remove the battery on the exciter’s exciter/control PWB (A5A1) when the Exciter - Low Battery alarm appears (on the AUI or via remote digital output). Chemical leakage from an old battery can cause damage.
  • Page 213 NV30LT-N OPERATIONS & MAINTENANCE MANUAL ROUTINE MAINTENANCE Figure 3.3.3: Replacing Exciter Battery Battery BT1 Top view (cover removed) EXCITER VERSION 0.1 2015-03-01 PAGE 3.3.9...

  • Page 214: Inspecting Lightning Protection Systems

    NV30LT-N OPERATIONS & MAINTENANCE MANUAL ROUTINE MAINTENANCE Inspecting Lightning Protection Systems You should inspect the lightning protection systems that are connected to your NV30LT-N transmitter, ac power, RF feedline, antenna and tower periodically to ensure that your site, equipment and personnel are fully protected.

  • Page 215: Non-Standard Maintenance

    AUI, Axia Livewire Module, Controller, Exciter B (if applicable), Orban Inside (if applicable), Rack, Server, SNMP Agent and Watchdog. Contact Nautel for the most recent software revision and download *.tgz file to a laptop or network location. Maximize the ARM’s disk space by deleting the old .tgz files. Use the Manage Files button to display the Upload Files window, select the file(s) to delete, and click the Delete button VERSION 0.1 2015-03-01...
  • Page 216 NV30LT-N OPERATIONS & MAINTENANCE MANUAL NON-STANDARD MAINTENANCE Transferring Upgrade File The following steps assume either the laptop will be used to connect directly to the transmitter OR the transmitter and network computer are currently connected to the same network. Transmitter IP Configuration From the transmitter AUI, go to Menu / User Settings / Network Setup .
  • Page 217 3.4.2. The transmitter login screen should appear. At the transmitter login screen enter: – User: “Nautel” or “****”, where **** is the user assigned user name – Password: leave blank (default) or “****”, where **** is the user assigned password Navigate through the AUI to Menu / Software / Upload Files , select the upgrade files tab and press Browse .

  • Page 218: Configuring A Mod Loss Backup Preset

    NON-STANDARD MAINTENANCE Configuring a Mod Loss Backup Preset The NV30LT-N contains an audio level detection circuit that can be used, when enabled, to allow switching to a secondary (backup) audio input source upon the loss of the primary source. Configure...
  • Page 219 NV30LT-N OPERATIONS & MAINTENANCE MANUAL NON-STANDARD MAINTENANCE Figure 3.4.2: Backup Preset Main Audio Screen The setup page for the selected preset should now appear. Click the Main Audio tab (see Figure 3.4.2). Click the Audio Source field’s drop-down arrow to view the available audio sources. Select the desired backup audio source.
  • Page 220 NV30LT-N OPERATIONS & MAINTENANCE MANUAL NON-STANDARD MAINTENANCE Figure 3.4.3: Saving the Backup Preset Configuring the Primary Audio Preset Go to Menu / Presets / Load . The Load Preset window in Figure 3.4.1 shall display. Select your primary or normal preset to allow editing of its audio loss parameters. Click Load .
  • Page 221 NV30LT-N OPERATIONS & MAINTENANCE MANUAL NON-STANDARD MAINTENANCE Figure 3.4.4: Normal Preset - Other Settings screen : SCA, RDS and Pilot modulation levels are additive and contribute the audio level. If their NOTE combined levels exceed the audio loss threshold level, a preset change will not occur. Stations with audio content containing extended nulls or silent periods (e.g., classical music) should consider...
  • Page 222 NV30LT-N OPERATIONS & MAINTENANCE MANUAL NON-STANDARD MAINTENANCE PAGE 3.4.8 VERSION 0.1 2015-03-01...

  • Page 223: List Of Terms

    Low Voltage Power Supply. A module or modules used in the ac-dc power stage that generates LVPS. the low level dc supply voltage for the transmitter. A setting that controls power level, frequency and audio parameters. The NV30LT-N allows you Preset. to pre-program multiple presets.
  • Page 224 NV30LT-N OPERATIONS & MAINTENANCE MANUAL LIST OF TERMS PAGE 3.5.2 VERSION 0.1 2015-03-01...
  • Page 226 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: support@nautel.com Web: www.nautel.com © Copyright 2015 NAUTEL. All rights reserved.

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