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Nautel GV2-20 Operation & Maintenance Manual

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3: OPERATIONS & MAINTENANCE
MANUAL
GV2-20/GV2-15
T
RANSMITTER
Document ID:
NHB-GV15-GV20-OPS
Version:
6.0
Issue Date:
2024-05-01
Status:
Standard

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  • Page 1 3: OPERATIONS & MAINTENANCE MANUAL GV2-20/GV2-15 RANSMITTER Document ID: NHB-GV15-GV20-OPS Version: Issue Date: 2024-05-01 Status: Standard...

  • 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 2024 NAUTEL. All rights reserved. VERSION 6.0 2024-05-01 PAGE 3.III...

  • Page 5: Table Of Contents

    GV2-20/GV2-15 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 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL 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 Software Upgrade via Remote AUI 3.4.2...

  • Page 7: Release Control Record

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL RELEASE CONTROL RECORD ISSUE DATE REASON 2024-05-01 Release 6 of GV2-20/GV2-15 (NARF73F/02). Supports software version GV2 SW 1.0.0 and later. VERSION 6.0 2024-05-01 PAGE 3.VII...
  • Page 8 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL PAGE 3.VIII VERSION 6.0 2024-05-01...

  • Page 9: Description

    1-phase, **175 - 265 V ac (240 V ac nominal)  : ** - The GV2-20/GV2-15’s full ac input range is 90 - 265 V ac (or 156 - 459 V ac, as applicable), NOTE but RF output power is limited when the voltage is less than 175 V ac (or 303 V ac, as applicable).

  • Page 10: Power Supply Interface Pwb

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL DESCRIPTION Power Supply Interface PWB See electrical schematic Figures SD-1A/B/C, SD-2 and SD-9 to SD-11. Each Power Supply (PS) Interface PWB (A1 and A17):  interfaces between the ac distribution terminal blocks and the LVPS and power supply modules.

  • Page 11: Control/Monitor Stage

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL DESCRIPTION Control/Monitor Stage See electrical schematic Figures SD-3 and SD-4. 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 (A5) and B (A6, optional) are the RF drive sources for the transmitter. They accept the external audio program information (see the GV2-20/GV2-15 Pre-installation Manual for details on various program input types). For dual exciter applications, the exciters’ main/standby operation is controlled locally using the local (or remote) AUI or the controller UI.

  • Page 13: Rf Power Stage

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL DESCRIPTION 20 kW RF Drive Splitter The 20 kW RF drive splitter (A27) contains a 3 dB hybrid coupler connected as a splitter. The RF drive source (A or B) selected by relay K1 is applied to A27’s A2J4 input. The signal is split into two equal amplitude signals that are 90°...

  • Page 14: Module Control/Interface Pwbs

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL DESCRIPTION Module Control/Interface PWBs See also electrical schematics Figures SD-13 through SD-20. There are two module control/interface PWBs (A3 and A18). Each of them performs the following functions:  interfaces with four RF power module’s RF drive inputs.
  • Page 15 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL DESCRIPTION 20 kW Combiner The 20 kW combiner (A25) accepts the RF outputs from the two 10 kW combiner/filters and uses a 3 dB hybrid coupler to provide a single, final RF output. The combined output is applied to the transmitter’s RF output, via the output power probe (A15).

  • Page 16: Output Power Probe

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL DESCRIPTION 1-Input Reject Load Assembly The 1-input reject load assemby (A13) provides a means to dissipate reject power from the output of the 20 kW combiner’s 3 dB hybrid coupler. The 1-input reject load assembly contains power resistors to dissipate reject power.
  • Page 17 ** DENOTES FOR DUAL EXCITER SYSTEMS ONLY. *** DENOTES LOW VOLTAGE POWER SUPPLIES 2A & 2B ARE OPTIONAL, BEYOND THE STANDARD LVPS 1A AND STANDARD REDUNDANT LVPS 1B. C/M = CONTROL/MONITORING Figure 3.1.1: GV2-20/GV2-15 Transmitter Block Diagram VERSION 6.0 2024-05-01 PAGE 3.1.9...
  • Page 18 Figure 3.1.2: GV2-20/GV2-15 Audio Path Block Diagram VERSION 6.0 2024-05-01 PAGE 3.1.10...

  • Page 19: Operating The Transmitter

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER SECTION 3.2: OPERATING THE TRANSMITTER This section provides information about operating the GV2-20/GV2-15 transmitter:  User Interface Options - see page 3.2.4  Advanced User Interface (AUI) - see page 3.2.9 ...
  • Page 20 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER  SNMP - see page 3.2.89  Spectrum Mask - see page 3.2.91  System Preferences - see page 3.2.92 Thresholds - see page 3.2.93   Time - see page 3.2.95 Transmitter Info - see page 3.2.97...
  • Page 21 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER  View Status - see page 3.2.164  View Alarms - see page 3.2.164  View Meters - see page 3.2.165 Reset Alarms - see page 3.2.168   Reset Alarms - see page 3.2.168 ...

  • Page 22: User Interface Options

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER User Interface Options The user can interface with the GV2-20/GV2-15 using one of four methods:  Locally, using the 17-inch front panel touch screen AUI (Advanced User Interface) (see Advanced User Interface (AUI), on page 3.2.9).
  • Page 23 Remote AUI Dashboard HOME page 3.2.20 page 3.2.9 Alarms page 3.2.36 Remote I/O Digital Inputs page 3.2.102 page 3.2.102 Digital Outputs page 3.2.105 Meters Analog Outputs page 3.2.107 page 3.2.37 Reports Presets Event History page 3.2.108 Presets page 3.2.44 page 3.2.108 page 3.2.44 Active Preset page 3.2.109...
  • Page 24 Controller UI Main Menu Top Level (see page 3.2.119) Status Screen Select Preset (see page 3.2.126) User Settings Edit Presets (see page 3.2.128) (see page 3.2.127) Set Clock (see page 3.2.151) Network Settings (see page 3.2.152) View Status View Alarms (see page 3.2.164) Pilot Sample (see...
  • Page 25 Controller UI Select Preset to Edit Presets Edit or Create New Preset RDS Settings Enable (see page 3.2.139) Output Power Data Source (see page 3.2.129) Baud Rate Frequency RDS Level (see page 3.2.129) RDS Phase PS Name IBOC Mode (see page 3.2.130) DPS Name...

  • Page 26: Advanced User Interface (Aui)

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Advanced User Interface (AUI) The GV2-20/GV2-15 has an Advanced User Interface (AUI) that is displayed on a 17-inch, colour LCD screen mounted on the front of the transmitter (see Figure 3.2.4). You can access the AUI: ...

  • Page 27: Logging Into The Aui

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Logging into the AUI The transmitter’s AUI provides a means to restrict local and remote access to transmitter control functions to authorized users only. Users can create accounts that can be pre-defined to set access restriction from view-only (no control), full control (all permissions), custom (select permissions) and administrative control.
  • Page 28 Viewer, the default password is blank. Click on the eyeball icon to see the characters of the password. : 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...

  • Page 29: Advanced User Interface

    To access the remote AUI, you need a device with an HTML5 capable web browser that is connected to the GV2-20/GV2-15 - directly or through a switch - via its rear panel LAN connection (A1J8A). The AUI has a wide range of features, including: ...
  • Page 30 The top banner is permanent on all AUI pages and includes:  Nautel Logo : From any page, click the Nautel logo to return to the Dashboard page. Remote/Local : Buttons that determine the location of the operational control of the transmitter. The ...
  • Page 31 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER  Forward Power : Displays the current forward power level of the transmitter.  Reflected Power : Displays the current reflected power level of the transmitter.  Active Preset: Displays the name of the active preset (e.g., Preset 1), call sign, carrier frequency in MHz, mode (e.g., FM), and power set point.

  • Page 32: Aui Pages

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER AUI Pages Table 3.2.1 defines the available AUI pages. Table 3.2.1: AUI Pages AUI Page Function Page Dashboard Present critical data and instruments. 3.2.18 Panel Selector Choose data and instrument panels for Dashboard.
  • Page 33 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Table 3.2.1: AUI Pages AUI Page Function Page Menu - Settings - Reboot Select Reboot Host, Active or Standby Exciter. 3.2.87 Options Menu - Settings - Screen Select Enable Screen Saver and Timeout or perform a 3.4.8...
  • Page 34 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Table 3.2.1: AUI Pages AUI Page Function Page Menu - Air Chain - Remote Enable remote support 3.2.116 Support Menu - Air Chain - Air View installed Air Chain versions 3.2.117 Chain Versions Menu - Sign Out Sign out of the AUI session.

  • Page 35: Aui Menu Page

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER AUI Menu page : Any menu item or feature in the Remote AUI that is grayed out is not available or is disabled. NOTE From the AUI’s top banner, click the Menu button to view the Menu page (see Figure 3.2.7).
  • Page 36 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER  Select Settings to access a sub-menu of settings options, including: – * Audio Processing (see Audio Processing - see page 3.2.67) – Exciter TCXO (see Exciter TCXO - see page 3.2.70) –...

  • Page 37: Managing And Displaying Dashboard Panels

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Managing and Displaying Dashboard Panels This section includes the following topics:  Describing Dashboard Panel Options - see page 3.2.22  Alarms - see page 3.2.24  Audio Inputs - see page 3.2.24 ...
  • Page 38 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.8: Panels displayed on Dashboard Remove Change Panel Panel One larger panel Up to four smaller panels displayed here displayed here VERSION 6.0 2024-05-01 PAGE 3.2.21...
  • Page 39 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Describing Dashboard Panel Options Click on the desired panel to display it. See Table 3.2.2 on page 3.2.23 for a description of each panel, noting there are two types - Data Panels and Instrument Panels. Data Panels display read-only measurement data.
  • Page 40 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Table 3.2.2: Dashboard Panels Panel Description Page Alarms Active transmitter alarms listing. 3.2.24 Audio Inputs Graphic meters for audio inputs. 3.2.24 Modulation Active exciter indicator and graphic modulation meter. 3.2.25 Meters Customizable transmitter meter list.

  • Page 41: Audio Inputs

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Alarms Figure 3.2.10. Displays active transmitter alarms, including critical alarms (red) and warning alarms (amber). A scroll bar will display, as required. The alarms listed in this panel should match the number of critical and warning alarms shown in the top banner of the AUI.
  • Page 42 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Modulation Figure 3.2.12. Displays the active exciter’s status (internal or external) and FM modulation level for the current preset. The current modulation level is displayed as follows: (green bar), its peak level (black line and shown numerically) and its full-scale value (typically 100%).
  • Page 43 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.14: Dashboard Meters Selection Check the ‘box’ icon to display meters on the Dashboard PAGE 3.2.26 VERSION 6.0 2024-05-01...

  • Page 44: Spectrum Analyzer

    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 45 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Click the “ ” button to gain access to spectrum settings (see Figure 3.2.16) such as: Settings  Resolution Bandwidth: determines the FFT bin size or the smallest frequency that can be resolved.

  • Page 46: Power Distribution

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Power Distribution Figure 3.2.17. The exciter measures the relative power levels of the signal and determines the probability of exceeding a given power level, relative to the average power. The data is plotted in the Power Distribution Plot as a CCDF (complementary cumulative distribution function).
  • Page 47 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER EQ Frequency Response Figure 3.2.18. This panel displays the frequency response of the exciter’s EQ filter. The panel displays the gain of the filter with respect to the magnitude and frequency of the modulating signal. A dashed line is displayed at the 0 dB level.

  • Page 48: Lissajous Plot

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Lissajous Plot Figure 3.2.19. 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 49 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER AM-AM Correction Figure 3.2.20. This panel displays the amplitude correction being applied to the RF drive signal in order to compensate for the transmitter amplitude (gain) response, which is non-linear. The x-axis represents the signal amplitude and the y-axis represents the gain correction applied for a given amplitude value.
  • Page 50 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER AM-PM Correction This panel displays the phase correction being applied to the RF drive signal in order to compensate for the transmitter’s (exciter +PA stage) phase non-linearity versus the output power. For example, in Figure 3.2.21, the transmitter output power is low, so the curve in the plot shows positive phase...
  • Page 51 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Constellation Figure 3.2.22. The exciter constantly measures the transmitter signal and performs basic demodulation of the digital carriers. The Constellation panel displays the phase and amplitude of the symbols being modulated within an OFDM sub-carrier as dots on a cartesian graph. There are separate screens for each sub-carrier.

  • Page 52: Aui Main Menu

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER AUI Main Menu The Main Menu contains the following features (see Figure 3.2.23):  Dashboard  Alarms (see 3.2.36)  Meters (see 3.2.37)  Presets (see 3.2.44)  Settings (see 3.2.65) ...
  • Page 53 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Alarms You can view the GV2-20/GV2-15’s operational status using the AUI’s Alarm page. This page shows current active alarms to aid in fault diagnosis. To view, click the Alarms button in the AUI’s main menu. Figure 3.2.24.
  • Page 54 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Meters The meters displayed in the AUI represents the active meters selected for the associated sub-sections and displays a real-time value. Select the Meters page and select one of the following transmitter sub-sections: ...
  • Page 55 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.25: Meters - HD Exciter Page (1 of 2) PAGE 3.2.38 VERSION 6.0 2024-05-01...
  • Page 56 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.26: Meters - HD Exciter Page (2 of 2) VERSION 6.0 2024-05-01 PAGE 3.2.39...
  • Page 57 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.27: Meters - Power Module Page (1 of 2) PAGE 3.2.40 VERSION 6.0 2024-05-01...
  • Page 58 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.28: Meters - Power Module Page (2 of 2) VERSION 6.0 2024-05-01 PAGE 3.2.41...
  • Page 59 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.29: Meters - Controller Page (1 of 2) PAGE 3.2.42 VERSION 6.0 2024-05-01...
  • Page 60 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.30: Meters - Controller Page (2 of 2) Figure 3.2.31: Meters - Rack Page NOTE: Number of racks varies with transmitter model (GV20 shown for reference) VERSION 6.0 2024-05-01 PAGE 3.2.43...
  • Page 61 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Presets This section includes the following subjects:  Managing Presets - Using the AUI Activating presets using the AUI - see page 3.2.44   Editing or creating presets using the AUI - see page 3.2.45 Scheduler - see page 3.2.62...
  • Page 62 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Both methods will indicate the current active preset, by a green check mark next to its radio button (e.g., Daytime, see Figure 3.2.32 on page 3.2.44). If the current preset is not the desired one, click the radio button of the desired preset in the Available Presets list, or create a new preset or clicking the Clone Preset button and edit the preset.
  • Page 63 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER General S ee Figure 3.2.33. Figure 3.2.33: General page  Preset Name: This field identifies the name of the current preset. Users must load a preset to directly edit this field. ...
  • Page 64 HD Power Boost Priority : for FM+HD mode only. Select either MER (modulation error ratio or signal quality; default setting) or Efficiency.  Selecting Efficiency maximizes the aggressiveness of Nautel’s HD PowerBoost process, an advanced peak-to-average power ratio reduction algorithm that prioritizes efficiency and power capability when reducing the peak-to-average power ratio, while ensuring that the MER of the transmitted HD signal meets transmission requirements.
  • Page 65 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Main Audio S ee Figure 3.2.34. Figure 3.2.34: Main Audio page  Audio Source: Select from Analog L/R, MPX, AES EBU, Audio Player to AES2 or MPX over AES.  Analog Level : applies to Analog Left/Right source only; enter value between -12 and +12 dBu, which represents the input voltage level that yields 100% modulation (Default is 0.0 dBu).
  • Page 66 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER  Backup Audio : When you set Backup Audio to Enabled, you can select a backup Audio Source and edit various parameters for the backup audio similarly to the main audio described above. The...
  • Page 67 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER S ee Figure 3.2.35. Figure 3.2.35: SCA page : Check your local broadcast regulatory body’s guidelines for allowable modulation depth with NOTE SCAs or RDS enabled.  MPX SCA: Connector (J7:A for SCA1, J7:B for SCA2) for use with an externally generated SCA; select Enabled or Disabled.
  • Page 68 GV2-20/GV2-15 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 Mode : select FM (frequency modulated sub-carrier, typical) or DSB-SC (double ...
  • Page 69 Refer to RDS Remote Protocol, on page 3.2.55 for information on using the ASCII protocol to remotely configure RDS settings and to observe the strings supported by Nautel. : The UECP protocol is fully supported. NOTE : The differences between RDS (European) and RBDS (North American) are not part of this NOTE manual.
  • Page 70 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER  Traffic Info: Select None, TA (Traffic Announcement), TP (Traffic Programme) or TA+TP. The receiver can often be set to pay special attention to this flag and, for example, stop the tape/pause the CD or re-tune to receive a traffic bulletin.
  • Page 71 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER  Artificial Head (bit 1 of DI, see NOTE below): select Enabled or Disabled. This selection is a decoder identification operating mode flag. Default is Disabled.  Compression Flag (bit 2 of DI, see NOTE below): Select Enabled or Disabled. This selection is a decoder identification operating mode flag.
  • Page 72 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER RDS Remote Protocol. The following information is intended to assist users with remote RDS settings using the ASCII protocol. ASCII over IP does not provide exciter responses. Assigning Settings: To assign a value to a setting, send the setting name, the equal sign (=) and the desired value.
  • Page 73 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER List of Settings: Table 3.2.3 lists the RDS settings supported by Nautel, including descriptions and examples. : Remote setting of the RDS baud rate is not supported. NOTE Table 3.2.3: Supported ASCII Settings for RDS...
  • Page 74 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Table 3.2.3: Supported ASCII Settings for RDS Setting Name Description/Example Decoder Single hex digit, range 0-9 and A-F (case insensitive) that encodes the Information flags Stereo(1)/Mono(0) - bit 0; Artificial Head (Yes=1, No=0) - Bit 1;...
  • Page 75 Software Version Typing this command (no = or ?) returns the current RDS encoder (special software version. available command) for ASCII Example: over IP // issue version command Nautel NVE RDS Encoder V1.0 // exciter response PAGE 3.2.58 VERSION 6.0 2024-05-01...

  • Page 76: Other Settings

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Other Settings Figure 3.2.37. Figure 3.2.37: Other Settings page  Orban Processor : select Enabled or Disabled. If Enabled, enter: Orban Preset – : select one of the 27 Orban presets from the dropdown menu.
  • Page 77 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER  Mod (Modulation) Loss Timeout : select Enabled or Disabled. If Enabled, enter: Action – : None (alarm only, no resulting action), Inhibit (inhibits the RF output and fans until the audio returns) or Change Preset (changes the active preset).
  • Page 78 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER  L/R Limiter: This look-ahead limiter can be applied to the signal immediately before the stereo generator in the exciter. It has a fixed attack-time (and corresponding delay) of approximately 1 s.
  • Page 79 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Scheduler You can program a preset schedule for the transmitter. Select Preset Scheduler from the Settings page in the Dashboard menu (see Figure 3.2.38) to set the dates and times at which presets take effect. You can define up to 63 different schedule rules.
  • Page 80 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Use the Edit Rule window as follows:  Use the drop-down menu to select the preset (e.g., Current Settings) for the rule. The preset’s power, mode and frequency are displayed below the preset.
  • Page 81 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.39: Edit Rule page PAGE 3.2.64 VERSION 6.0 2024-05-01...
  • Page 82 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Settings The Settings menu (see Figure 3.2.40 on page 3.2.66) contains the following features: Audio Processing (see Audio Processing - see page 3.2.67)   Exciter TCXO (see Exciter TCXO - see page 3.2.70)
  • Page 83 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.40: Main Menu - Settings NOTE: For consistency, the Settings menu is the same for all transmitter series. If a transmitter does not have a feature installed or enabled, such as Audio Processing, that menu option is greyed out in the Settings list.

  • Page 84: Audio Processing

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Audio Processing This section describes how to configure and operate the Orban Audio Processor in your transmitter. There are 29 different Orban presets available. You can interface with audio processor functionality locally, using the controller front panel UI or the remote AUI. The extent of the features available depends on which interface is used.
  • Page 85 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.41: Settings - Audio Processing Edit Enabled Preset Delete By clicking the Edit button, you can change the various settings for the active preset. See Figure 3.2.42 on page 3.2.69. The Audio Processing selections include: Less More, Stereo Enhancer, AGC, EQ, Final Clipping, 2Band, 2Band Distortion, Multiband, Compressors, Bandmix, Multiband Distortion, and UL Distortion.
  • Page 86 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER : The Audio Processor page contains nine tabbed sections that allow managing of Orban presets. NOTE These tabbed pages (see Figure 3.2.42) illustrate the many parameters associated with an Orban preset. Detailed descriptions are not included in this document. Refer to the Orban Optimod 5500 manual for more information on setting these parameters.

  • Page 87: Exciter Tcxo

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Exciter TCXO You can calibrate the internal clock reference to an external 10 MHz clock (e.g. GPS synchronized 10 MHz clock) or manually enter an offset value using the remote AUI. : You can also adjust the exciter TCXO offset value and run a TCXO calibration from the controller...

  • Page 88: External 10 Mhz

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER External 10 MHz You can configure the GV2-20/GV2-15 to accept an external 10 MHz input using the AUI or using the controller UI (see External 10 MHz Input, on page 3.2.158). : You can also adjust the exciter TCXO offset value and run a TCXO calibration from the controller...
  • Page 89 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER FM Polarity The FM Polarity page (see Figure 3.2.45) allows the user to invert the polarity of the frequency modulation (i.e., positive going modulation signal yields positive deviation; or positive going modulation yields negative deviation). Options are Normal or Inverted. Select from the dropdown menu and click the Save button to enable the changes.

  • Page 90: Hardware Configuration

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Hardware Configuration The Hardware Configuration page allows the user to 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 processor).
  • Page 91 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER This menu has seven sub-menu options:  Exciter Changeover - see page 3.2.74  Installed Exciter(s) - see page 3.2.74 LVPS Hardware - see page 3.2.74   LVPS Voltage - see page 3.2.75 Fan Speed - see page 3.2.75...
  • Page 92 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER LVPS Voltage You can set the default LVPS voltage. The user can set the LVPS voltage to any value between 40 and 53 V, in 0.01 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 93: Audio Processor

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Audio Processor If an Orban Audio Processor is installed, the transmitter must be configured to recognize it. : Configuring the Orban audio processor locally will cause the AUI to display an Orban Inside NOTE setting.
  • Page 94 Enter the Netmask IP address and click Save . Enter the Gateway IP address and click Save . Enter the E2X Port address and click Save . The Exgine expects E2X on port 9000, some non-Nautel users utilize port 11000.
  • Page 95 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.47: Settings - HD/DRM - Exgine Settings PAGE 3.2.78 VERSION 6.0 2024-05-01...
  • Page 96 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER HD Settings The HD Settings page allows users to establish Forward Tap Delay, FM+HD Low Inj Gain, FM+HD High Inj Gain and HD Gain levels. It also allows for an HD Power Calibration. Changes applied to the active exciter (A or B) only.
  • Page 97 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.48: Settings - HD/DRM - HD Settings PAGE 3.2.80 VERSION 6.0 2024-05-01...

  • Page 98: Spectrum Efficiency Optimizer

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Spectrum Efficiency Optimizer The Spectrum Efficiency Optimizer page allows the user to optimize the transmitter’s spectrum and/or efficiency. See Figure 3.2.49. To optimize the HD operation, adjust the following parameters:  Optimization Enabled - Slide the icon to the right and click Save. Enabling allows the optimizer to adjust the PA voltage setting to maximize efficiency based on the transmitter output spectrum.
  • Page 99 OPERATING THE TRANSMITTER Network CAUTION! When connecting to a Nautel transmitter, we support both HTTP and HTTPS protocols. If using HTTP, the data traffic is not encrypted, meaning your username/password could be compromised. For security reasons, Nautel recommends using HTTPS whenever possible.
  • Page 100 (gateway and nameservers are optional). You must enter them manually using the transmitter’s controller front panel. In this case, DHCP should be set to OFF . : A nameserver: (also called a DNS) translates a host name (e.g., mail.nautel.com) to an IP address NOTE such as in configuring email (see Network on page 3.2.82...
  • Page 101 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Notifications The Notifications feature (see Figure 3.2.51) provides a means for the transmitter to issue emails or texts (SMS messages) triggered by user defined alarm events. If you use this feature, you must also configure...
  • Page 102 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.52: Notifications/Email Server Configuration Page Authentication enabled for All IP addresses shown are for reference purposes only reference purposes only VERSION 6.0 2024-05-01 PAGE 3.2.85...

  • Page 103: Email Server

    3.2.85): Enter the following five parameter fields:  Host : In order to enter a server name (e.g., mail.nautel.com), at least one nameserver IP address must be entered.  Port Number : This logical connection end point uses a number to identify the type of process to which an internet or other network message is to be forwarded to when it arrives at a server.

  • Page 104: Reboot Options

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Reboot Options The Reboot Options page allows users to select the reboot various devices throughout the transmitter. Figure 3.2.53. There are three reboot options to choose from:  Reboot Host (SBC) ...

  • Page 105: Security Certificates

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Screen Configuration (Local AUI only) The Screen Configuration page allows users to enable a Screen Saver for the front panel display and perform a touchscreen calibration. Refer to Non-standard maintenance - see page 3.4.1 for detailed information on these features.
  • Page 106 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER SNMP The SNMP configuration page provides a user with a means to configure the SNMP agent and the associated traps (see Figure 3.2.55). Figure 3.2.55: Settings - SNMP Traps enabled for reference purposes only VERSION 6.0 2024-05-01...
  • Page 107 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Configure the SNMP agent as follows: Enter the first five fields, noting the following:  Agent Port: Enter the UDP port where the SNMP agent checks for requests. The default setting is 161. If your transmitter is behind a firewall, you must open this port to use SNMP.

  • Page 108: Spectrum Mask

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Spectrum Mask The Spectrum Mask page allows users to select the appropriate FM mask standard being used by the Dashboard spectrum analyzer. See Figure 3.2.56. Use the Mask Type dropdown menu to select the desired mask (factory setting is FCC).

  • Page 109: System Preferences

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER System Preferences The System Preferences page allows the user to display the Temperature units in either Celsius or Fahrenheit. See Figure 3.2.57. Select from the drop-down menu and click the Save icon to save the changes.

  • Page 110: Audio Low Thresholds

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Thresholds You can set thresholds for the main audio and SCA sources (trip level and timeout) using the remote AUI. These thresholds determine the limit for an associated low audio power alarm to be activated.
  • Page 111 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Low Forward Power Thresholds Use the up and down buttons to move the cursor to the desired line item and click the Save icon to save the changes. Select a threshold between 0 and 100% (in 0.5% increments), that corresponds to a per- centage of rated power.
  • Page 112 UI, it will also be reflected on the remote AUI, and vice versa. Setting the Clock - Using the AUI You can remotely set the GV2-20/GV2-15’s time and date by selecting Time from the Settings menu. See Figure 3.2.60).
  • Page 113 You can configure an NTP (Network Time Protocol) server to allow clock synchronization with all computers on the same network as the transmitter. : The accuracy of the NTP synchronization is related to the distance to the server, therefore Nautel NOTE recommends you choose servers in the same country as the equipment.

  • Page 114: Transmitter Info

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Transmitter Info : Nautel recommends adding a Transmitter Name and Serial Number to the Transmitter Info NOTE section. This will provide easy transmitter identification when using the remote AUI. The Transmitter Info page allows the user with a means to name the transmitter as a simple identifier.
  • Page 115 : Depending on the permission level assigned to a given user, some features shown in NOTE Figure 3.2.63 on page 3.2.100 may not be displayed or available. The GV2-20/GV2-15 contains two default user accounts when it leaves the factory. (Administrator and Viewer). See AUI Pages on page 3.2.15).
  • Page 116 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Setting Permissions There are three user permissions, each with their own specific functionality. See Figure 3.2.63 on page 3.2.100. All users have permission to change their own name, email, language and password, after their account has been created, but are otherwise limited to the following functions: ...
  • Page 117 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.63: User Form Page Set or Change the Password To set or change your password, click Change Password at the bottom, left of the User Form screen. A menu appears (see Figure 3.2.64 on page...

  • Page 118: Delete An Account

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.64: Changing Password Delete an Account To delete a user account, click the Delete User icon of the desired user in the Users list (see Figure 3.2.62 on page 3.2.98). Click Continue in the confirmation window to delete the user account or click Close to keep the user account and return to the Users list.

  • Page 119: Digital Inputs

    OPERATING THE TRANSMITTER Remote I/O The Remote I/O page allows the user to configure the remote input/output interface for the transmitter. Refer also to the GV2-20/GV2-15 Installation Manual for information on remote inputs and outputs and their factory default settings. ...
  • Page 120 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.66: Input Editing Menu Select Input Channel From the editing screen for remote input 1 through 7, you can configure the input for one of a variety of channel inputs. Click the Channel field’s up/down arrows to display the following options: ...
  • Page 121 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Configure Input Control Logic From the editing screen for remote input 1 through 7, you can configure the input’s active/inactive control logic. Click the Control field’s up/down arrows to display the following options, noting the...

  • Page 122: Digital Outputs

    Figure 3.2.67), you can configure up to six outputs that indicate either the presence of various alarms or the status of operator controlled circuits. Nautel sets remote output defaults prior to shipping. See the Installation Manual for details. Figure 3.2.67: Remote I/O - Digital Outputs Page...
  • Page 123 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Select Output Channel From the editing screen for remote output 1 through 6, you can configure the output for one of a variety of channel outputs. Click the Channel field’s up/down arrows to display the following options: ...

  • Page 124: Analog Outputs

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Analog Outputs There are four analog outputs - forward power, reflected power, Average PA Voltage and Total PA Current - that can be remotely monitored. These outputs are factory defined parameters and cannot be...

  • Page 125: Event History

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Reports The Reports page allows the user to view and download transmitter events by the following criteria: Event History  Active Preset   Meters Settings  Event History In the Event History report (see Figure 3.2.70 on page...
  • Page 126 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Active Preset In the Active Preset report (see Figure 3.2.71 on page 3.2.109), the user can select the following criteria from the drop-down menu:  No Filter    Main Audio ...
  • Page 127 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Meters In the Meters report (see Figure 3.2.72 on page 3.2.110), the user can select the following criteria from the dropdown menu:  No Filter  Summary  Transmitter  Controller ...
  • Page 128 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Settings In the Settings report (see Figure 3.2.73 on page 3.2.111), the user can select the following criteria from the dropdown menu:  No Filter  General  Software Versions  Exciter Thresholds ...

  • Page 129: Software Upgrades

    : Nautel provides a transmitter update mechanism by connecting a USB drive to the rear USB NOTE ports of the GV2 controller. Nautel will provide instructions on how to create a USB drive and complete the update or provide preprogrammed USB drives with instructions.

  • Page 130: Software Versions

    Plug-ins are referenced by Name and Version By clicking the Software Licenses hyperlink, the user is directed to Nautel’s support website which provides a list of open source Nautel Software Licenses used by this product.
  • Page 131 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Air Chain : HD Air Chain operation not available for GV2 SW 1.0.0 and is planned for future releases. NOTE The Air Chain menu contains the following three sub-menus:  Virtual Platform Configuration ...
  • Page 132 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.76: Virtual Platform Configuration VERSION 6.0 2024-05-01 PAGE 3.2.115...

  • Page 133: Remote Support

    When the service is enabled, the GV2 transmitter will establish a TCP/IP network connection to the Nautel remote support server through which only Nautel can access all relevant user interface screens to diagnose and troubleshoot problems. The Nautel customer service representative will assign a Connection ID to be entered for the troubleshooting duration, as well as a URL and port number for the server if the default values need to be changed.
  • Page 134 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Air Chain Versions The Air Chain Ver sions page (see Figure 3.2.78) in the Air Chain menu displays the operating versions of the vPlatform, SPD Driver and the Proxmox which are referenced by Name and Version .

  • Page 135: Controller Front Panel Ui (User Interface)

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Controller Front Panel UI (User Interface) The controller’s front panel has a user interface (UI) featuring a 4 x 20 character graphic LCD display (see Figure 3.2.81 on page 3.2.119). The UI can be controlled by its adjacent keypad. The UI contains a menu-based series of pages that serve specific functions.
  • Page 136 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Main Menu This main menu is the starting point for navigating through the UI screens. See Table 3.2.4 on page 3.2.121 for a list of screens and their basic functions. Figure 3.2.81: Main Menu...
  • Page 137 GV2-20/GV2-15 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 3.2.81 on page...
  • Page 138 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Controller UI Screens Table 3.2.4 defines the available UI display screens on the controller module. Table 3.2.4: Controller UI Screens Controller UI Screen Function See Page 3.2.119 Main Menu Choose options and navigate to other screens.
  • Page 139 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Table 3.2.4: Controller UI Screens Controller UI Screen Function See Page 3.2.144 User Settings - Edit Presets - Edit the selected preset’s limiter settings. Limiter types include hard Limiter Settings limiter, AGC limiter, 2-slope limiter, L/R limiter and MPX RMS limiter.
  • Page 140 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Table 3.2.4: Controller UI Screens Controller UI Screen Function See Page 3.2.165 View Status - View Meters View the levels of various transmitter parameters, including forward power, reflected power, PA voltage, PA current and low level dc supply voltages.
  • Page 141 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Table 3.2.4: Controller UI Screens Controller UI Screen Function See Page 3.2.182 System Settings - HW Config - Set the normal-state level of the low voltage power supply. LVPS Voltage System Settings - HW Config - Set the normal-state speed of the transmitter’s cooling fans.
  • Page 142 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Table 3.2.4: Controller UI Screens Controller UI Screen Function See Page 3.2.198 Selecting an Orban Audio Select an Orban audio processor preset using either the AUI or the Processor Preset controller UI.

  • Page 143: Select Preset

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Select Preset The Presets page allows users with the appropriate permissions to view operational data (power level, frequency, mode, program input characteristics), plus create and control preset settings. Users can create up to 62 presets or edit existing presets. To view the Presets page, select Presets in the Menu page.

  • Page 144: User Settings

    OPERATING THE TRANSMITTER User Settings You can establish various user settings for the GV2-20/GV2-15 using the controller’s UI. Several User Settings were described previously in this section (e.g., Edit Presets, Set Clock, Network Settings, etc.). The following additional options are available: ...

  • Page 145: Edit Presets

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Edit Presets When you select User Settings -> Edit Presets from the Main Menu (see Figure 3.2.84) you can create up to 63 operating presets or edit existing presets. Figure 3.2.84: Edit Preset screen...

  • Page 146: Output Power

    21 kW (for GV20) or 15.75 kW (for GV15).  To allow personnel to safely perform antenna tower maintenance, you can operate the GV2-20/ GV2-15 below its minimum rated power level. This requires disabling or extraction of RF power modules.
  • Page 147 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER IBOC Mode Figure 3.2.89. Use the up and down buttons to select the overall transmission mode, noting the options below, then press the accept (checkmark) button to save the change. Press the cancel ( X ) button to return to the previous menu.

  • Page 148: Iboc Settings

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER IBOC Settings Figure 3.2.90. When you select IBOC Settings from the Preset editing options screen, you can edit various IBOC parameters Figure 3.2.90: IBOC Settings menu Use the up and down buttons to scroll through the IBOC settings options, then press the accept (checkmark) or right arrow button to enter the selected editing screen.
  • Page 149 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.91: IBOC Settings editing screens For FM+HD and HD modes, use the up and down buttons to select a value between -20 and -10 dB for the IBOC injection level of the lower sideband of digital carriers. This value determines the relationship between the digital carriers power and the analog carrier power.
  • Page 150 GV2-20/GV2-15 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 3.2.92). Figure 3.2.92: 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 151 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.93: Main Audio editing screens Use the up and down buttons to locate the desired audio source - MPX, Analog L/R, MPX Over AES, Audio Player -> AES 2, Audio Player ->...
  • Page 152 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.94: 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 153: Pilot Settings

    GV2-20/GV2-15 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 3.2.96). Figure 3.2.96: 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 154 GV2-20/GV2-15 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 3.2.98). Figure 3.2.98: 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 155 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.100: 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 156: Rds Settings

    GV2-20/GV2-15 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 3.2.101). Figure 3.2.101: 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 157 (X) button to discard changes and return to the previ- ous menu. Default setting is UECP. NOTE For an ASCII Over IP data source, RDS information should be sent to the IP address of the GV2-20/GV2-15, port 7005. NOTE For title/artist functionality, the GV2-20/GV2-15 sup- ports the radiotext (RT) data type, using the UECP or Ext.
  • Page 158 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.103: RDS Settings editing screens (2 of 3) Enter an 8-character name. Use the right and left arrows to move the cursor to the desired character. Use the up and down arrows to edit the character, then press the accept (checkmark) button to save the change.
  • Page 159 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.104: 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 160 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.105: 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 161: Limiter Settings

    GV2-20/GV2-15 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 3.2.107). Figure 3.2.107: Limiter Settings menu Use the up and down buttons to move the cursor to the desired limiter and then press the right button...
  • Page 162 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.108: 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 163 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.110: 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 164 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.111: 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 165 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.112: 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 166 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.114: 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 167: Audio Delay

    GV2-20/GV2-15 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 3.2.115). Figure 3.2.115: 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 168: Setting The Clock

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Setting the Clock When you select User Settings -> Set Clock from the Main Menu (see Figure 3.2.117) you can set the current time and date. The time appears on the top line of the top level screen (see Figure 3.2.80 on...

  • Page 169: Network Setup

    (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 170 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.118: 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 171 OPERATING THE TRANSMITTER Connecting a Laptop Directly to the Transmitter If connecting to the GV2-20/GV2-15 directly with a laptop, you must set a static IP address on the GV2- 20/GV2-15 and your laptop. From the controller UI’s Main Menu , go to User Settings -> Network Settings and set the IP address as follows: ...

  • Page 172: Setting Pilot Sample Level

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Setting Pilot Sample Level : Setting the pilot sample is only available using the controller UI. NOTE From the controller 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 173: Configure Test Signal Generator

    : The test signal generator function is only available using the controller UI. NOTE From the controller UI, you can configure the test signal generator output of the GV2-20/GV2-15. 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 174 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.121: 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 175 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER External 10 MHz Input To view the enable/disable screen for the external 10 MHz input (see Figure 3.2.122), select User Settings -> Ext. 10 MHz Inp from the Main Menu . Figure 3.2.122: Front Panel - External 10 MHz Input screen Use the up or down arrow to toggle between ON (using external 10 MHz input) and OFF (not using external 10 MHz input), then press the accept (checkmark) button to save the change.

  • Page 176: Enabling The Scheduler

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Enabling the Scheduler To view the Scheduler enable/disable screen (see Figure 3.2.123) on the controller front panel display, select User Settings -> Scheduler from the Main Menu . Figure 3.2.123: Enabling/disabling the scheduler - Front Panel Use the up and down buttons to select ON (enable) or OFF (disable).

  • Page 177: Selecting Fm Mask

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Selecting FM Mask : FM Mask selection is only available using the controller UI. NOTE From the controller UI, you can select the appropriate FM mask standard (FCC, ETSI or None) being used by the analyzer on the AUI.
  • Page 178 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Setting User Thresholds From the controller UI, you can establish the low audio thresholds and timeout delays for the main audio and SCAs. To view the Audio Low screen, select User Settings -> Audio Low from the Main...

  • Page 179: Turn-On Delay Setting

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Turn-On Delay Setting The turn-on delay setting is only available using the controller UI. NOTE From the controller 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. This is typically used in sites with multiple transmitters on a common generator.

  • Page 180: Ramp-Up Speed Setting

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Ramp-Up Speed Setting The ramp-up speed setting is only available using the controller UI. NOTE From the controller UI, you can set the transmitter’s ramp-up speed. This setting establishes the time it takes the transmitter to ramp up from 0 W to full power.

  • Page 181: View Status

    When you select View Status -> View Alarms or View Status -> View Log from the Main Menu (see Figure 3.2.129), you can view various active or logged events, respectively, of the GV2-20/GV2-15. These parameters are likely displayed on multiple pages and require that you scroll to view all of them.
  • Page 182 Figure 3.2.130) you can view various metered parameters of the GV2-20/GV2-15. 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 183 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Controller: RMS Forward Power Reject 3-4 Power Reject 17-32 Power, as applicable FM Forward Power Reject 5-6 Power, Reject 1-24 Power, as applicable as applicable IBOC Forward Power Reject 7-8 Power, Reject 1-32 Power,...
  • Page 184 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Exciter (A/B, as applicable): Exc Fwd Power Exc -15V Dig 2 R Level Exc Refl Power Exc +5V_A MPX SCA Level Exc PA VSWR Exc +5V_B MPX RMS % Exc PA Voltage Exc +3.3V...

  • Page 185: Reset Alarms

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Reset 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 Reset Alarms, on page 3.2.168) or using the controller’s UI display.

  • Page 186: Exciter Changeover Settings

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Exciter Changeover Settings From the controller UI, you can set the active exciter, main exciter, auto changeover status, changeover delay and exciter configuration. To view the Changeover screen, select System Settings ->...
  • Page 187 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.133: Changeover Editing Screens For display only. Indicates the active exciter - Exciter 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 Exciter A or Exciter B.

  • Page 188: System Settings

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER System Settings WARNING! System settings are established at Nautel and should not require any adjustment. Making changes to these settings may void your warranty. Contact Nautel before making changes. You can perform the following functions using the System Settings menu of the controller UI: ...

  • Page 189: Host Reboot

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Host Reboot : A host reboot is available using the controller UI. Once the host is rebooted, all users that were NOTE remotely connected (logged in) will be logged out. From the controller UI, you can reset the host. To view the Host Reboot screen, select System Settings ->...

  • Page 190: Firmware Update

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Firmware Update : A firmware update is available using the controller UI. It can also be performed from the AUI, NOTE using the Upgrade Software page in the System Settings menu (see Software Upgrades, on page 3.2.112).
  • Page 191 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Use the up and down buttons to move the cursor to the desired display setting and then press the right button to enable editing of the setting. Figure 3.2.138 on page 3.2.174 shows the editing screens for the LCD Settings menu.
  • Page 192 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Exciter TCXO : You can also adjust the exciter TCXO offset value using the AUI (see Exciter TCXO, on page NOTE 3.2.70). To view the controller UI’s Exc TCXO screens (see Figure 3.2.139), select System Settings ->...
  • Page 193 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER HD Optimizer : You can also optimize the digital signal (spectrum mask) using the AUI (see Spectrum Efficiency NOTE Optimizer, on page 3.2.81). From the controller’s UI, you can enable and configure various HD signal parameters (e.g., injection level, TPO, etc.) in an attempt to optimize the digital signal’s overall efficiency.
  • Page 194 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.141: HD Optimizer Screens Select ON to allows the optimizer to adjust the PA voltage setting to maximize efficiency based on the transmitter output spectrum. Depending on other settings in this section, it may require other actions to maintain the transmitter’s...
  • Page 195 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER HW Config From the controller’s 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 Processor).
  • Page 196 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Installed Exciter From the controller 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 197 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Exciter B Modulator Exciter B Modulator is only visible in dual exciter configurations. The options are the same as Exciter A Modulator, see Exciter A Modulator on page 3.2.179 for details. GV Family From the controller UI, you can configure the transmitter family type to match with the installed exciters.
  • Page 198 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER LVPS Hardware From the controller UI, you can configure the transmitter for the number of installed LVPS modules. If you have upgraded your transmitter to dual LVPS modules, you may have already been prompted to change this configuration.
  • Page 199 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER LVPS Voltage From the controller UI, you can set the default LVPS voltage. The transmitter will set the LVPS voltage to this value (between 40 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 200 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.149: 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 201 GV2-20/GV2-15 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. From the controller front panel UI, you can set the FM polarity. To view the FM Polarity screen, select System Settings ->...

  • Page 202: Factory Settings

    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 controller’s UI, you can adjust various factory settings such as critical parameter thresholds, calibration values, exciter PA power level, etc.
  • Page 203 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 controller’s UI, you can set alarm thresholds for critical parameters. To view the Thresholds...
  • Page 204 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Calibration : Most of the Calibration settings are only available using the controller UI. NOTE From the controller’s UI, you can calibrate various parameters. To view the Calibration menu (see Figure 3.2.154), select System Settings -> Factory Settings -> Calibration from the Main Menu .
  • Page 205 NOTE exciter reflected (Exc Rfld) calibrations are performed at the factory and should not require user adjustment. Contact Nautel for assistance, if necessary. Exciter Tilt From the controller front panel UI, you can set the exciter tilt settings. To view the Exciter Tilt screen, select System Settings ->...
  • Page 206 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Exciter PA Power : The exciter PA power setting is only available using the controller UI. NOTE From the controller UI, you can set the exciter’s PA power level at 98 MHz. To view the Exciter PA Power screen, select System Settings ->...

  • Page 207: Remote I/O Settings

    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 AUI. Nautel sets remote input defaults prior to shipping. See the GV2-20/GV2-15 Pre-installation Manual for details.
  • Page 208 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.159: Remote Inputs Screens (Input 1 shown) Use the up and down buttons to select the desired remote input (1 through 10) from the list. Each screen shows the current remote 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 209: Remote Outputs

    3.2.160), you can configure up to 16 remote outputs that indicate either the presence of various alarms or the status of operator controlled circuits. Nautel sets remote output defaults prior to shipping. See the GV2-20/GV2-15 Pre-installation Manual for details. Figure 3.2.160: Remote Outputs Screens (Output 1 shown) Use the up and down buttons to select the desired remote output (1 through 16) from the list.
  • Page 210 3.2.161), 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 GV2-20/GV2-15 Pre-installation Manual for details.

  • Page 211: 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 GV2-20/GV2-15 transmitter. View the Orban Optimod-FM 5500 Digital Audio Processor Operating Manual online at: http://www.orban-europe.com/downloads/5500/Documentation/5500_1.2_Operating_Manual.pdf...

  • Page 212: Configuring The Transmitter For The Orban Audio Processor

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Configuring the Transmitter for the Orban Audio Processor Configure the GV2-20/GV2-15 to recognize the presence of the Orban card using the controller UI (see Orban Enabling) or the AUI (see Orban Enabling - Using the Remote AUI - see page 3.2.67) as follows:...

  • Page 213: Enabling The Orban Audio Processor For Preset Selection

    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 214 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Figure 3.2.163: Enabling the Orban Audio Processor - Controller UI VERSION 6.0 2024-05-01 PAGE 3.2.197...
  • Page 215 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL OPERATING THE TRANSMITTER Selecting an Orban Audio Processor Preset Select an Orban audio processor preset using either the AUI (see Orban Enabling - Using the Remote AUI - see page 3.2.67) or the controller UI (see...

  • Page 216: Section 3.3: Routine Maintenance

    Replacing an Air Filter, on page 3.3.3. Clean the GV2-20/GV2-15 using a vacuum cleaner and a soft-bristle brush to remove loose dirt. Clean, damp rags should be used to remove dirt that cannot be removed with a vacuum cleaner. Never use compressed air to clean the GV2-20/GV2-15.

  • Page 217: Checking Hardware

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL ROUTINE MAINTENANCE Checking Hardware All hardware must be checked at least once a year. Thermal cycling from turning the GV2-20/GV2-15 on and off will require more frequent checks.  To prevent damaging the hardware, ensure that the proper sized tools are used. In most cases, hardware is metric.

  • Page 218: Replacing An Air Filter

    Take the following steps to replace an GV2-20/GV2-15 air filter: Order a new filter or filters, as necessary. You can order a standard sized filter from Nautel (Nautel Part # HR195) or from the manufacturer (standard size 15” x 24” x 2” American Air Filter PerfectPleat SC M8 MERV 8 or equivalent;...
  • Page 219 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL ROUTINE MAINTENANCE Figure 3.3.1: Replacing Front Air Filters 2 quarter-turn fasteners to remove filter bracket Air flow direction Bracket Filters PAGE 3.3.4 VERSION 6.0 2024-05-01...
  • Page 220 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL ROUTINE MAINTENANCE Figure 3.3.2: Replacing Rear Air Filters Reject Load Fan Filters (no securing hardware; media is washable) Air flow direction Filters Bracket 4 quarter-turn fasteners to remove filter bracket (not necessary to remove the rear panel) VERSION 6.0 2024-05-01...

  • Page 221: 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 222: Replacing The Controller Module's Battery

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL ROUTINE MAINTENANCE Replacing the Controller Module’s Battery Replace the battery on the controller module’s controller PWB (A4A2) once a year, or whenever the Controller - Low Battery alarm appears (on the AUI, controller UI or via remote digital output).
  • Page 223 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL ROUTINE MAINTENANCE Figure 3.3.3: Replacing Controller Battery 3 V Battery CONTROLLER MODULE Rear view (filter panels removed) PAGE 3.3.8 VERSION 6.0 2024-05-01...

  • Page 224: Inspecting Lightning Protection Systems

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL ROUTINE MAINTENANCE Inspecting Lightning Protection Systems You should inspect the lightning protection systems that are connected to your GV2-20/GV2-15 transmitter, ac power, RF feedline, antenna and tower periodically to ensure that your site, equipment and personnel are fully protected.
  • Page 225 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL ROUTINE MAINTENANCE PAGE 3.3.10 VERSION 6.0 2024-05-01...

  • Page 226: Section 3.4: Non-Standard Maintenance

    : Nautel provides a transmitter update mechanism by connecting a USB drive to the rear USB NOTE ports of the GV2 controller. Nautel will provide instructions on how to create a USB drive and complete the update or provide preprogrammed USB drives with instructions.
  • Page 227 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL NON-STANDARD MAINTENANCE Contact Nautel for the most recent software revision and download *.tgz file to a laptop or network location. Maximize the SBC’s disk space by deleting the old .tgz files. You can Browse, Upload, Refresh, Delete and Start Upgrade form this screen.
  • Page 228 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL NON-STANDARD MAINTENANCE Figure 3.4.2: File Upload in Progress .tgz file shown for reference, software upgrade file name will differ When the file is fully uploaded, the file will be displayed in the Select upgrade for installation field. See Figure 3.4.3 on page...
  • Page 229 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL NON-STANDARD MAINTENANCE Figure 3.4.3: File Upload field Populated Select the upgrade file from the list and click Start Upgrade to initiate the software upgrade process. A warning will be displayed, indicating that the upgrade can take up to fifteen (15) minutes to complete and cannot be stopped once started.
  • Page 230 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL NON-STANDARD MAINTENANCE Figure 3.4.5: File Upgrade in Progress A notification will be displayed if the upgrade was successful or has failed. If the upgrade was successfully completed, the transmitter will require a reboot. Click the Reboot button or the link in the top banner to start the reboot process.
  • Page 231 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL NON-STANDARD MAINTENANCE Figure 3.4.6: File Upgrade Complete/Reboot A warning will be displayed, indicating that the transmitter will be off-air for up to two (2) minutes during a reboot. Press Yes to reboot that transmitter or Cancel to revert to the previous software. See Figure 3.4.7.
  • Page 232 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL NON-STANDARD MAINTENANCE Clicking on Refresh List will show the user all upgrade files currently available. To delete an upgrade file from the list, select the desired file and click Delete Upgrade File. See Figure 3.4.1 on page 3.4.2.

  • Page 233: Screen Configuration

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL NON-STANDARD MAINTENANCE Screen Configuration NOTE! The Screen Configuration menu is only visible in Local mode. The Screen Configuration page allows users to enable a Screen Saver and set the Screen Saver Timeout for the front panel display or perform a touchscreen calibration. See Figure 3.4.8.

  • Page 234: Touchscreen Calibration

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL NON-STANDARD MAINTENANCE Touchscreen Calibration A touchscreen calibration will be required if the AUI or the controller’s internal solid-state drive (SSD) has been replaced. To perform a touchscreen calibration, perform the following steps:  plug a USB mouse into Single Board Computer (SBC).
  • Page 235 Enter and confirm your new password. Record your new password on the OS Password document provided with the transmitter. If you would like Nautel to track your password for support purposes, please email support@nautel.com with your new information. Close the console window.

  • Page 236: Configuring A Mod Loss Backup Preset

    NON-STANDARD MAINTENANCE Configuring a Mod Loss Backup Preset The GV2-20/GV2-15 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 237 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL NON-STANDARD MAINTENANCE Figure 3.4.9: Presets/Other Settings - Mod Loss Enabled From the transmitter AUI, go to Presets /Audio and enable Backup Audio. See Figure 3.4.10 on page 3.4.13. When enabled, other parameters have to set. They are as follows (refer to...
  • Page 238 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL NON-STANDARD MAINTENANCE Figure 3.4.10: Backup Preset Main Audio Screen VERSION 6.0 2024-05-01 PAGE 3.4.13...
  • Page 239 To safely perform antenna tower maintenance within the United States (as per FCC RFR) and Canada (as per Health Canada’s Safety Code 6), the GV2-20/GV2-15’s RF output power must be reduced below the normal minimum set-point. To achieve this, RF power modules are inhibited (disabled), using their front panel ENABLE/DISABLE switch until the output power is below 600 W.

  • Page 240: Section 3.5: List Of Terms

    GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL LIST OF TERMS SECTION 3.5: LIST OF TERMS This section defines some of the terms that are used in Nautel documentation. Audio Engineering Society/European Broadcasting Union (AES/EBU) is the name of a digital AES/EBU. audio transfer standard. The AES/EBU digital interface is usually implemented using 3-pin XLR connectors (the same type connector used in professional micros).
  • Page 241 GV2-20/GV2-15 OPERATIONS & MAINTENANCE MANUAL LIST OF TERMS PAGE 3.5.2 VERSION 6.0 2024-05-01...
  • Page 243 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 2024 NAUTEL. All rights reserved.

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