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Nautel NX50 Installation Manual

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NX50 Transmitter
Installation Manual
Document:NHB-NX50-INS
Issue:
6.1 2021-07-13
Status:
Standard

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Summary of Contents for Nautel NX50

  • Page 1 NX50 Transmitter Installation Manual Document:NHB-NX50-INS Issue: 6.1 2021-07-13 Status: Standard...
  • Page 3 The comparisons and other information provided in this document have been prepared in good faith based on publicly available information. The reader is encouraged to consult the respective manufacturer's most recent published data for verification. © Copyright 2019 NAUTEL. All rights reserved.

  • Page 5: Table Of Contents

    NX50 Installation Manual Table of contents Contents Release control record Preparing for installation Unpacking and positioning Installing the power transformer Connecting the station reference ground Connecting ac power Adjusting the spark gap Installing audio inputs Planning complete? Routing cables and connecting audio inputs...
  • Page 6 NX50 Installation Manual Parts and tools 10-1 Contacting Nautel 10-1 Parts supplied by Nautel 10-1 Parts not supplied by Nautel 10-2 Parts ordering 10-2 Module replacement program 10-2 Tools for installation 10-3 Pre-installation / Installation assistance 11-1 Pre-installation consulting 11-1...

  • Page 7: Release Control Record

    NX50 Installation Manual Release control record Issue Date Reason 2019-04-01 Supports release 6 of hardware (NARA53E) and software version NX SW 4.7 or higher. 2021-07-13 Section 3: Installing the Power Transformer - changes for wheel assembly and fuse and MOV assembly connections.
  • Page 8 NX50 Installation Manual Page viii Issue 6.1 2021-07-13...

  • Page 9: Preparing For Installation

    (see Figure 1.1). Figure 1.1: Tip and Drop Indicators 4. Report any damage immediately to your Nautel sales representative and the carrier. 5. Move the crates as close as possible to the transmitter’s planned location. Issue 6.1 2021-07-13 Page 1-1...
  • Page 10 8. Gather the parts and tools you will need for installation. For a list of required tools, see “Parts and tools” on page 10-1. 9. When you are ready to install the NX50 transmitter, follow the steps shown in Figure 1.2 on page 1-3.
  • Page 11 NX50 Installation Manual Preparing for installation Figure 1.2: Flowchart - Installing the transmitter Unpacking and positioning - see page 2-1 Installing the power transformer - see page 3-1 Connecting the station reference ground - see page 4-1 Connecting ac power - see page 5-1...
  • Page 12 NX50 Installation Manual Preparing for installation Page 1-4 Issue 6.1 2021-07-13...

  • Page 13: Unpacking And Positioning

    The NX50 contains adjustable feet that allow leveling of the cabinet in its final position. ensure the leveling feet are fully retracted (up) before moving the NX50. failure to do so may cause damage to the leveling feet and attached metalwork.
  • Page 14 (see the NX50 Pre-Installation Manual for details), follow the installation steps below: • Obtain the cover plate (Nautel Part # 207-8211) packed with the ancillaries. • Remove the nine (9) M4 screws that secure the filter brackets to the rear door and remove the air filter and brackets (see Figure 2.1 on page...
  • Page 15 These brackets provide additional mechanical strength to the top of the cabinet(s). 14. Obtain the ac entry adapter plate assembly (Nautel Part # 207-8428) from the ancillary kit. Using hardware (4 each; M6 stainless hex screws, split and plain washers) tyrapped to assembly, install on top of cabinet as shown in Issue 6.1 2021-07-13...
  • Page 16 NX50 Installation Manual Unpacking and positioning Figure 2.1: Installing Rear Plate and Removing Top Cover Plate - Closed Air Cooling Partial Rear View Remove the 9 M4 screws that secure the filter bracket. Use same holes and hardware to install cover plate.
  • Page 17 NX50 Installation Manual Unpacking and positioning Figure 2.2: Opening the Transmitter Filter Door Remove the 23 M5 screws that secure the hinged filter panel. Front Door Removed for Clarity Issue 6.1 2021-07-13 Page 2-5...
  • Page 18 NX50 Installation Manual Unpacking and positioning Figure 2.3: Installing Antenna Ground Switch Antenna Ground Switch (Nautel Part # 207-8320-04) Four sets of M6 hardware (packed with antenna ground switch) Aluminum Rod (secure to probe bracket with M8 hardware, packed with...
  • Page 19 NX50 Installation Manual Unpacking and positioning Figure 2.4: Installing RF Output Connector (3 1/8” EIA) Standard 3 1/8” EIA (Nautel Part # 203-6094-02) Four sets of M6 hardware (hex screw, split washer and plain washer) M8 Hex Bolt (60LG) Issue 6.1 2021-07-13...
  • Page 20 NX50 Installation Manual Unpacking and positioning Figure 2.5: Installing RF Output Connector (4 1/16” EIA) Standard 4 1/16” EIA (Nautel Part # 203-6094-03) Four sets of M6 hardware (hex screw, split washer and plain washer) M8 Hex Bolt (20LG) Page 2-8...
  • Page 21 NX50 Installation Manual Unpacking and positioning Figure 2.6: Installing RF Output Connector on Antenna Ground Switch Standard 3 1/8” EIA (Nautel Part # 207-8322-01) Four sets of M6 hardware (hex screw, split washer and plain washer) Optional 4 1/16” EIA...
  • Page 22 NX50 Installation Manual Unpacking and positioning Figure 2.7: Location of Arc Detector Assembly Arc Detector Assembly (A47) Partial Rear View; Rear Door Removed for Clarity Page 2-10 Issue 6.1 2021-07-13...
  • Page 23 NX50 Installation Manual Unpacking and positioning Figure 2.8: Installing Stiffener Brackets Install stiffener brackets to create a frame as shown. Remove and re-use the hardware securing the exhaust duct grill to secure the brackets. Single-cabinet transmitter shown. For multi-cabinet Ac Entry Adapter Plate transmitters, repeat installation for each cabinet.
  • Page 24 NX50 Installation Manual Unpacking and positioning Page 2-12 Issue 6.1 2021-07-13...

  • Page 25: Installing The Power Transformer

    Be sure to scrape any excess epoxy off the electrical joint area. Figure 3.1: NX50 power transformer line voltage tap layout (350 - 510 V or 570 - 630 V) Load 3...
  • Page 26 NX50 Installation Manual Installing the power transformer Figure 3.2: NX50 power transformer line voltage tap layout (198 - 330 V) Load 3 Load 2 Load 1 Load 0 Line 1 Line 3 Line 2 Table 3.1: Three-phase primary winding tap nominal voltages (rms, phase-to-phase)
  • Page 27 NX50 Installation Manual Installing the power transformer 2. Open the back door of the transmitter. 3. Remove the back plate at the bottom/back of the transmitter cabinet by removing four mounting screws (see Figure 3.4 on page 3-5). WARNING: The power transformer weighs 417 kg (919 lbs). Do not attempt to move...
  • Page 28 Wheels (Qty 2) (provided with transformer) CAUTION: The NX50 Power Transformer does not contain a connection for a neutral wire. Refer to your electrical code or advice from the electrician installing the transmitter. If it’s advised to terminate the neutral wire, it can be connected to the AC ground stud or tied back.
  • Page 29 NX50 Installation Manual Installing the power transformer Figure 3.4: Power Transformer Installation Backing Plate (removed for clarity) 11. Locate the six 14 AWG wires # 202 through 205, 210 and 211, noting they are tyrapped near SCR rectifier assembly A1.
  • Page 30 : All connections to MOVs (U1, U2 and U3) are made on the left-hand side of the fuse and NOTE MOV assembly (see Figure 3.7 on page 3-8). No connections are made on the right-hand side. Figure 3.5: NX50 Power Transformer Assembly Locations Fuse and MOV Line (1, 2, 3) and Ac Phase Load (1, 2, 3) connections...
  • Page 31 NX50 Installation Manual Installing the power transformer Figure 3.6: NX50 Ac Input Terminals Ac Input Wiring (via cable duct) AC 3 AC 1 AC 2 Wiring to Transformer Line Terminals Issue 6.1 2021-07-13 Page 3-7...
  • Page 32 NX50 Installation Manual Installing the power transformer Figure 3.7: Fuse and MOV Assembly Wiring Locations XF1-2 XF1-4 Page 3-8 Issue 6.1 2021-07-13...

  • Page 33: Connecting The Station Reference Ground

    Note: Proper grounding configuration is critical for protecting transmitter circuitry from lightning strikes. See the Electrical Requirements section of the NX50 Pre- Installation Manual or the Recommendations for Transmitter Site Preparation Manual for information on proper grounding and lightning protection recommendation.
  • Page 34 NX50 Installation Manual Connecting the station reference ground Figure 4.1: Safety Ground Stud Assembly Detail INTERIOR EXTERIOR 1) M10 BRASS STUD 2) M10 NUT 3) M10 FLAT WASHER 4) M10 SPLIT WASHER 5) EXTERIOR REFERENCE GROUND CONDUCTOR 6) CABINET FRAME...

  • Page 35: Connecting Ac Power

    1. Route the ac power cable from the ac disconnect switch to the transmitter, passing all the conductors, as a group, through a ferrite toroid (Nautel Part # LP32, provided in the ancillary kit). The preferred entry point is the top of the transmitter. An internal...
  • Page 36 NX50 Installation Manual Connecting ac power Page 5-2 Issue 6.1 2021-07-13...

  • Page 37: Adjusting The Spark Gap

    Section 6: Adjusting the spark gap The NX50’s RF output filter contains a spark gap that must be adjusted - based on site altitude - to provide protection against excessive voltage (i.e., lightning) on the RF output. : Nautel presets the spark gap for 0.114 inches, which corresponds to a site altitude of 0 m (i.e, NOTE sea level).
  • Page 38 NX50 Installation Manual Adjusting the spark gap Figure 6.1: RF Output Spark Gap Location This side is stationary Locking Nut Top Cover and Filter panel removed for clarity Page 6-2 Issue 6.1 2021-07-13...
  • Page 39 NX50 Installation Manual Adjusting the spark gap Table 6.1: Altitude Scale Factor Spark Gap Scale Factor Altitude (ft) (multiply gap by...) 1.00 1,000 1.04 2,000 1.08 3,000 1.14 4,000 1.18 5,000 1.23 6,000 1.29 7,000 1.35 8,000 1.41 9,000 1.48 10,000 1.55...
  • Page 40 NX50 Installation Manual Adjusting the spark gap Page 6-4 Issue 6.1 2021-07-13...

  • Page 41: Installing Audio Inputs

    – Install a conduit termination on the entry plate, if desired. – Re-install the entry plate on top of the transmitter using two M4 screws. 3. Obtain two ferrite toroids (Nautel Part # LXP44 and either one of Nautel Part # LP23 or LXP38) from the ancillary kit.
  • Page 42 8. Connect the appropriate audio input cable(s) to the connector(s) shown in Figure 7.3 on page 7-4. Secure cables to the existing cabling and to the panel using arrowhead tyraps (Nautel Part # HAC15) in the ancillary kit (see Figure 7.3 on page 7-4 to locate tyrap anchor hole locations).
  • Page 43 NX50 Installation Manual Installing audio inputs Figure 7.2: Audio Cable Entry AUDIO CABLE ENTRY Cable Entry Note: Wiring access hole has a removable plate with a pre-cut 1/4-inch dia hole. Use a chassis punch tool (e.g., Greenlee) to create the desired hole size (up to 2 inches) on the plate.
  • Page 44 NX50 Installation Manual Installing audio inputs Figure 7.3: Audio Connections (Exciter Panel shown) BALANCED 10 MHz ANALOG ANALOG SYNC AES/EBU AES/EBU AUDIO CONTROL/INTERFACE PWB Page 7-4 Issue 6.1 2021-07-13...

  • Page 45: Installing Control/Monitor Wiring

    – Install a conduit termination on the entry plate, if desired. – Re-install the entry plate on top of the transmitter using two M4 screws. 3. Obtain two ferrite toroids (Nautel Part # LXP44 and either one of Nautel Part # LP23 or LXP38) from the ancillary kit.
  • Page 46 GPS reference signal, install the GPS antenna and cabling in the selected location, then connect the cable to J2 on the GPS Sync PWB. Secure wires to the existing cabling and to the panel using arrowhead tyraps (Nautel Part # HAC15) in the ancillary kit (see Figure 8.4 on page 8-5...
  • Page 47 NX50 Installation Manual Installing control/monitor wiring Figure 8.1: GPS Sync PWB Configuration for GPS Antenna Part of GPS SYNC PWB (A11A5) (E2 shown configured for Nautel supplied 3.3 V antenna) Configuration for 5 V antenna (not supplied by Nautel) Configuration for 3.3 V antenna...
  • Page 48 NX50 Installation Manual Installing control/monitor wiring Figure 8.3: Remote Cable Entry REMOTE CABLE ENTRY Cable Entry Note: Wiring access hole has a removable plate with a pre-cut 1/4-inch dia hole. Use a chassis punch tool (e.g., Greenlee) to create the desired hole size (up to 2 inches) on the plate.
  • Page 49 NX50 Installation Manual Installing control/monitor wiring Figure 8.4: Remote Interface Connections Digital Arrowhead tyrap Outputs anchor holes External +15V IN Analog Out- puts Digital Inputs A4 - REMOTE INTERFACE PWB External System Interlock and PDM Inhibit connections, as applicable Issue 6.1 2021-07-13...
  • Page 50 NX50 Installation Manual Installing control/monitor wiring Figure 8.5: Web Interface Connection Secure to existing cable Ethernet cable entry with tyraps Connect to left-hand (LAN1) connector A62A1 nearest the D-sub connectors Page 8-6 Issue 6.1 2021-07-13...

  • Page 51: Commissioning Tasks

    1. If still present (i.e., the air filter was not removed for closed loop cooling), remove the air filter from the transmitter (located on the rear door) and spray it on both sides with filter coat adhesive spray (Nautel Part # HQ59), located in the ancillary kit. Re-install the air filter on the transmitter.
  • Page 52 NX50 Installation Manual Commissioning tasks 5. Connect the dummy load’s interlock or, if necessary, simulate the closing of all external interlocks. This requires a short circuit between TB1-1 and TB1-2 and between TB1-3 and TB1-4 of the control/interface PWB. WARNING:...

  • Page 53: Commissioning

    Note: The following procedures require the use of the transmitter’s front panel AUI. If you require assistance to navigate the front panel, refer to the NX50 Operations and Maintenance Manual for detailed information. 1. Switch on the ac power at the service entrance to turn on the transmitter.
  • Page 54 See the “Operating the Transmitter” section of the NX50 Operations & Maintenance Manual for detailed information. 16. Set the time and date on the AUI display. See the NX50 Operations and Maintenance Manual. 17. Using a web browser go to ftp://www3.nautel.com/NX_Series/...
  • Page 55 NX50 Pre-Installation Manual for details. 22. If you purchased the optional GPS Sync PWB, use the AUI to set the synchronization source to " GPS Sync Card ". See the “Operating the Transmitter” section of the NX50 Operations and Maintenance Manual for detailed information.
  • Page 56 NX50 Installation Manual Commissioning tasks Modulation checks Verify that the RF output is appropriately modulated when audio is applied: 1. Connect an appropriate modulation monitor to the control/interface PWB’s RF MONITOR BNC connector (J7). The RF monitor level is factory set for 5 Vrms. Ensure there is sufficient attenuation installed between the RF MONITOR connector and the modulation monitor.

  • Page 57: Going On-Air

    2. Connect the transmitter's RF output to an antenna system (or verify that the current connection is intact). Ensure that a ferrite toroid (Nautel Part # LP32) is installed on the RF coaxial hardline at the transmitter’s output. 3. Turn on the transmitter’s ac power.

  • Page 58: Network Setup

    IP Address, Netmask, Gateway and Nameserver sub- menus, as applicable. 4. Once you have established an IP address, you can login to the NX50’s advanced user interface (AUI), which allows you to remotely control and monitor the NX50. See the “Operating the transmitter”...
  • Page 59 Parts supplied by Nautel Ancillary parts kit An ancillary parts kit is shipped with the NX50. This kit contains hardware needed during the installation process. The kit includes toroids, spare fuses, screws and other miscellaneous hardware. Issue 6.1 2021-07-13...
  • Page 60 See “NX50 transmitter manuals” described in the Pre-installation Manual. Parts not supplied by Nautel Some parts and materials required to complete installation are not supplied by Nautel. The parts you need vary with the installation requirements. The list of parts you normally provide yourself during installation include: •...
  • Page 61 NX50 Installation Manual Parts and tools Tools for installation The tools you need during transmitter installation include the following: • Digital voltmeter • Philips screwdrivers, sizes #1 and #2 • Pliers • Wire cutters • Slot screwdriver, 5 mm (3/16 inch) •...
  • Page 62 NX50 Installation Manual Parts and tools Page 10-4 Issue 6.1 2021-07-13...
  • Page 63 Pre-installation consulting Nautel field support specialists are available to answer questions and work with you to ensure that your site will be ready for the installation of your NX50 transmitter. For support, contact Nautel Customer Service and request assistance (“On-site support” on page 11-3).
  • Page 64 • Ac power wiring for the transmitter has been installed and connected at the breaker panel or the building’s service entrance. If local electrical codes allow Nautel personnel to connect the transmitter to the ac supply, using the customer's cable, that task is included in this service.
  • Page 65 If you require on-site assistance, Nautel’s field support specialists can help you prepare your site and ensure that your NX50 transmitter installation can proceed as quickly as possible. For more information about on-site support, including scheduling and pricing, contact Nautel Customer Service: •...
  • Page 66 4. If the Buyer receives a replacement module, as part of Nautel's module exchange program, the old module must be returned to Nautel within 30 days of receipt of the new module, at the buyers expense. If the old module is not received after 30 days, the customer will be invoiced.
  • Page 67 Buyer's expense. Where no-charge warranty replacements or repairs are provided under items 2, 3, 4, or 5, Nautel will pay that part of the shipping costs incurred in returning the part/assembly to the Buyer. Note: the Buyer is responsible for any and all import fees, duties or taxes.
  • Page 68 NX50 Installation Manual Pre-installation / Installation assistance 13. Nautel provides telephone and email support for its products for the life of the product at no charge. After the warranty period, parts and on-site support for the equipment are offered at a rate to be determined upon request.
  • Page 69 Pre-installation / Installation assistance Module exchange service In order to provide Nautel customers with a fast and efficient service in the event of a problem, Nautel provides - for North American customers only - a factory rebuilt, module exchange service which takes full advantage of the high degree of module redundancy in Nautel equipment.
  • Page 70 Only repairs done at Nautel's facilities or by Nautel authorized personnel will be covered by the Extended Warranty Plans. You must ship faulty products back to Nautel, prepaid, and in the original package or in a package that provides equivalent protection.
  • Page 71 NX50 Installation Manual List of terms Section 12: List of terms This section defines some of the terms that are used in Nautel documentation. Analog to Digital Converter. ADC. AES-EBU. Audio Engineering Society/European Broadcasting Union (AES/EBU) is the name of a digital audio transfer standard.
  • Page 72 Preset. A setting that controls power level, active exciter, and power scheduler status on a time-of- day and date basis. Exciters can be configured on a preset for a specific operating mode (for example, Exciter A - conventional AM, and Exciter B - IBOC). The NX50 allows you to pre-program multiple presets.
  • Page 74 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 2021 NAUTEL. All rights reserved.

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