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Nautel NX5 AM, Operation & Maintenance Manual

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NX5 OPERATION & MAINTENANCE MANUAL

OPERATING THE TRANSMITTER

VERSION 0.1  2015-08-01

PAGE 3.2.41

Figure 3.2.29: AM-PM Correction

AM-PM Correction

This panel displays the phase correction being applied to the RF drive signal. The x-axis represents the 
input signal amplitude and the y-axis represents the phase shift correction applied for a given 
amplitude value.

Click on the panel to display a cursor in the approximate area. The cursor position (LUT index and 
phase) is noted in the upper, right-hand corner of the panel. Click in other areas of the instrument panel 
to provide a coarse adjustment of the cursor position.

Use the left and right buttons to make fine adjustments to the cursor position.

Use the up or down button to maximize (if it was minimized) or minimize (if it was maximized) the 
panel size.

Summary of Contents for NX5 AM

Page 1: ...3 OPERATION MAINTENANCE MANUAL NX5 AM TRANSMITTER Document ID NHB NX05 OPS Version 0 1 Issue Date 2015 08 01 Status Preliminary ...

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Page 3: ...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 The comparisons and other information provided in this document have been prepared in good faith based on publicly available information For verification of materials the reader is encouraged to consult the respective manufacturer s mo...

Page 4: ......

Page 5: ...ons 3 2 4 Viewing Transmitter Log 3 2 22 Viewing Instrument Panels 3 2 31 Available Instrument Panels 3 2 35 Viewing Real Time Meters 3 2 48 Presets Editing Operational Settings 3 2 58 Resetting Alarms 3 2 84 Viewing Transmitter Status Remote AUI 3 2 85 User Settings 3 2 87 User Settings Front Panel UI 3 2 111 Precorrection Settings 3 2 114 User Accounts 3 2 123 System Settings Remote AUI 3 2 127 ...

Page 6: ...76 Changing Exciter Transfer Settings 3 2 182 Routine maintenance 3 3 1 Upgrading Software 3 3 1 Scheduled Maintenance 3 3 5 Replacing the Air Filter 3 3 6 Performing On Air Checks 3 3 8 Replacing the Control Interface PWB Battery 3 3 9 Inspecting Lightning Protection Systems 3 3 11 List of terms 3 4 1 ...

Page 7: ...RATION MAINTENANCE MANUAL VERSION 0 1 2015 08 01 PAGE 3 VII Release Control Record ISSUE DATE REASON 0 1 2015 08 01 Initial Release of manual Supports NX5 hardware NARA66 Supports NX SW version 4 5 and higher ...

Page 8: ...NX5 OPERATION MAINTENANCE MANUAL PAGE 3 VIII VERSION 0 1 2015 08 01 ...

Page 9: ...e page 3 1 3 Control Monitor Stage see page 3 1 5 RF Power Stage see page 3 1 7 RF Output Network see page 3 1 8 includes combiner and filter Refer to the functional block diagram Figure 3 1 5 on page 3 1 13 NX5 Electrical Schematics Some descriptions in this section refer to electrical schematics SD s These are located at the end of the NX5 Troubleshooting Manual Redundancy The NX5 features redun...

Page 10: ...which supplies a B current sample to the rack interface PWB The rectifier assembly output is applied to a choke input filter and the B distribution assembly which then provides the B voltage to the RF power modules The B discharge relay which is part of the B distribution assembly opens when ac power is applied and closes and ac power is removed applying a high power discharge resistor across the ...

Page 11: ... exciter PWBs A A5 and B A6 optional and control interface PWB A4 The dual digital AM exciter PWBs provide two independent exciter sections A and B which can be selected automatically or by local or remote control The control interface PWB acts as an interface point for audio inputs and RF drive and PDM outputs Digital AM Exciter PWB s The digital AM exciter PWBs A A5 and B A6 optional accept audi...

Page 12: ...compensate by decreasing its output power to restore the parameter to an acceptable level A sample of the B supply voltage is monitored A B compensation circuit adjusts the PDM duty cycle to compensate for variations in the B supply in order to maintain constant transmitter output power and mimimize hum A PDM inhibit A or B input is applied from the control interface PWB to inhibit the PDM drive f...

Page 13: ...from the selected source Ext 10 MHz GPS Sync PWB or Combiner for synchronizing the RF carrier frequency and phase Control Monitor Stage See Figure 3 1 5 on page 3 1 13 and electrical schematics SD 2 and SD 3 The control monitor stage monitors critical signal samples and status alarm signals from the exciter stage RF power stage and ac dc power stage It also provides customer interfaces for monitor...

Page 14: ...ain alarm fault conditions routes program inputs and synchronization signal to the exciter s muliplexes exciter A and B s PDM outputs Contains an ARM processor host that runs the operating system and server that provides remote AUI functionality accepts USB and Ethernet inputs Local and Remote Interfacing The transmitter s local interface is provided via the front panel UI display U3 a 4 x 20 grap...

Page 15: ...dule interface PWB 48 V dc voltage is applied to the fan trays via the rack interface PWB and the power module interface PWB The output of each RF power module is applied to a primary winding of a series combining transformer The resultant combined output is applied to the RF output network Each RF power module also monitors the tachometer signals from the two fans on its associated fan tray appli...

Page 16: ... for control and monitoring purposes see VSWR Protection on page 3 1 9 A static drain choke provides a dc short to ground to dissipate static build up on the antenna system and an adjustable spark gap provides protection for the transmnitter output from lightning events on the antenna Figure 3 1 2 RF Output Network RF Pwr Mdl 1 RF 1 A23 Directional Coupler Forward Power RF Current Sample RF 1 L Sh...

Page 17: ...ing or short circuits The protection circuit is set at 1 5 1 at 5 kW plus 100 peak modulation using the reflected power sample from the directional coupler see 3 1 2 on page 3 1 8 and triggers the controller s Fast SWR Shutback alarm designed to shutback PDM reduce power to zero and disable RF drive in less than 100 ns This protection ensures that the RF drive to the RF power modules is disabled i...

Page 18: ...to 0 W and remains in that state for 100 ms This allows time for an arc or transient fault to clear After 100 ms the output power exponentially ramps up to the power set point or the power limit set by the exciter whichever is lower After 30 s the transmitter returns to full power under control of the normal ALC When a shutback occurs the cutback accumulator is set to a normalized value of 1 This ...

Page 19: ...t which the shutback event occurred whichever is lower When multiple cutback events occur the output power is reduced by 85 of the current level after each event The minimum cutback power level is 2 of full carrier power Further cutbacks will not decrease the power beyond this point When the transmitter is recovering from a cutback event the accumulator must first reach 0 which takes 60 s After th...

Page 20: ...in order to maintain a reflected power that is less than this limit This gradual reduction in power into high VSWR allows the transmitter to continue to operate into VSWR levels as high as 1 5 1 at full carrier power and even higher VSWR levels when the carrier power is reduced This VSWR protection is intended to protect against short or open circuits when the transmitter is turned on as well as n...

Page 21: ...ANCED ANALOG PM ENABLE STREAMING BUS RF DRIVE LATCH PDM INHIBIT SERIAL BUS B VOLTAGE SAMPLE RF VOLTAGE SAMPLE EXCITER A BALANCED ANALOG STREAMING BUS RF DRIVE LATCH RF DRIVE SERIAL BUS CONNECTIONS RF MONITOR CONNECTIONS ANALOG REMOTE OUTPUTS RF VOLTAGE SAMPLE REFLECTED POWER SAMPLE PM1 ENABLE PDM FAN TRAY 2 TACH A B PART OF CONTROLLER SERIAL BUS FAST SHUTBACK B VOLTAGE SAMPLE RF DRIVE INTERFACE AC...

Page 22: ...tter Log see page 3 2 22 Transmitter Log Using the Remote AUI see page 3 2 22 Transmitter Alarms and Log Using the Front Panel UI see page 3 2 30 Understanding the Log Manager Window see page 3 2 24 Viewing Instrument Panels see page 3 2 31 Viewing Real Time Meters see page 3 2 48 Viewing Real Time Meters using the Remote AUI see page 3 2 48 Viewing Real Time Meters Front Panel UI see page 3 2 54 ...

Page 23: ...page 3 2 103 Configuring NTP Servers see page 3 2 106 Nautel Phone Home see page 3 2 109 Setting Call Sign ID see page 3 2 110 Configure Test Signal Generator see page 3 2 112 Precorrection Settings see page 3 2 114 User Accounts see page 3 2 123 Setting User Permission Level see page 3 2 124 Editing Account Information see page 3 2 124 First Time Login see page 3 2 126 System Settings Remote AUI ...

Page 24: ...ltage Calibration see page 3 2 151 Forward Reflected Power Calibration see page 3 2 153 RF Symmetry Adjustment see page 3 2 154 SWR Threshold Adjustment see page 3 2 156 Transmitter Type see page 3 2 158 Transmitter Frequency see page 3 2 159 PDM Settings see page 3 2 161 Configuring Remote Inputs and Outputs see page 3 2 163 Remote I O Settings Using the Remote AUI see page 3 2 163 Remote I O Set...

Page 25: ... input output I O wiring connected to the control interface PWB A4 see the NX5 Pre installation Manual for I O details SNMP which is used to communicate transmitter control commands e g RF on off main exciter active preset power adjustments etc as well as monitor data such as alarm states and meter values SNMP communication is configurable using the remote AUI see SNMP Configuration on page 3 2 10...

Page 26: ...O see 3 2 163 View Alarms see 3 2 30 View Meters see 3 2 54 View Log see 3 2 30 Clear Log see 3 2 30 Host Reset see 3 2 135 Console Select no user adjustment Firmware see 3 2 137 LCD Settings see 3 2 138 Run TCXO Cal see 3 2 139 Exciter Sync see 3 2 140 RF Monitor see 3 2 142 Power Lockout see 3 2 143 Factory Settings Edit Presets see Sheet 2 of 2 Audio Cal see 3 2 150 B Settings see 3 2 152 RF Sy...

Page 27: ...io Options see 3 2 77 Output Power see 3 2 76 AM Source Level depends on AM source Format Preemphasis DCC Settings see 3 2 79 Mode DRM Settings see 3 2 80 Filter Type FRONT PANEL UI Mod Loss see 3 2 82 Enable Threshold Timeout Action Preset Copy Another Preset see 3 2 84 Configuration see 3 2 77 AMSS see 3 2 82 IBOC Settings see 3 2 81 Screen is only displayed if the appropriate AM source is selec...

Page 28: ... Settings see page 3 2 87 Network Setup Email Configuration Notifications Exgine Settings SNMP Configuration Audio Loss Power Thresholds Remote I O see page 3 2 163 Inputs Outputs Status see page 3 2 85 Logs see page 3 2 22 Critical Parameters Time Setup RF Symmetry SWR Thresholds Transmitter Type Transmitter Frequency PDM Settings Precorrection Settings see page 3 2 114 Mag Phase Delay B Setpoint...

Page 29: ... remote enabled Remote amber LED on local and remote control and remote disabled Remote LED off local control only The transmitter s local controls are always enabled so the Local LED is always on In Local only mode Remote amber LED off the front panel switches and UI control transmitter operation and all of the remote controls except the external interlock are disabled In Remote enabled mode cont...

Page 30: ...Line 3 desired power set point and modulation percentage Line 4 Page 1 shows operating frequency and mode of operation e g Analog AM Page 2 shows the PA voltage and total dc current levels Main Menu This main menu is the starting point for navigating through the UI screens See Table 3 2 1 on page 3 2 12 for a list of screens and their basic functions Figure 3 2 6 Main Menu Press up or down button ...

Page 31: ...t lower level screen on edit screens acts as an accept or save function in some cases the display will prompt its use X on menu and list screens exits to the next higher level screen on edit screens acts as a cancel function in some cases the display will prompt its use Saving Settings Many of the UI screens allow for modifying a selected setting Use the checkmark button to save a change Use the X...

Page 32: ...ns Edit the selected preset s audio characteristics such as source level format pre emphasis and filtering page 3 2 77 Edit Presets DCC Settings Edit the selected preset s DCC mode and settings if applicable page 3 2 79 Edit Presets DRM Settings Edit the selected preset s DRM settings if applicable page 3 2 80 Edit Presets IBOC Settings Edit the selected preset s IBOC settings if applicable page 3...

Page 33: ...t network information such as MAC address view only DHCP on off status IP address netmask and gateway page 3 2 90 User Settings Exgine Settings Set Exgine parameters page 3 2 98 User Settings Scheduler Enable disable the scheduler page 3 2 175 User Settings Signal Gen Enable disable and setup the internal signal generator page 3 2 112 System Settings Edit various transmitter system settings see ot...

Page 34: ...outputs and analog outputs for the transmitter page 3 2 163 Factory Settings Sets critical thresholds calibration values and operating values for key transmitter parameters These settings are established at the factory and do not normally require user adjustment see other Factory Settings options in this table page 3 2 147 Factory Settings Audio Calibration Calibrate the analog audio input with a ...

Page 35: ...d events log Presets Factory Settings System Settings Precorrection Settings User Accounts Changeover as applicable User Settings Remote Input Output Configuration Scheduler Audio Player Each remote AUI page provides information about a specific transmitter function All navigation through the remote AUI pages begins on the main screen or Home page shown in Figure 3 2 7 on page 3 2 16 Access the re...

Page 36: ... power set point based on the current forward and reflected power levels are shown as well as the operating mode and carrier frequency Active Exciter Displays the active exciter A or optional B Click on the Active Exciter area to shortcut to the Changeover page see Changing Exciter Transfer Settings on page 3 2 182 Modulation Level Displays the L R modulation levels as well as the Envelope Magnitu...

Page 37: ...ted that is not affecting the transmitter s normal operation This page is also available through the Menu page Logs Click to shortcut to the Transmitter Log page which displays historical alarm and status records for the transmitter see Viewing Transmitter Log on page 3 2 22 Local Remote Displays the operational control status of the transmitter If Local is highlighted green only local control of ...

Page 38: ...ngs Network Setup on page 3 2 88 2 On your router or firewall software open ports 3501 and 80 and close restrict access to port 22 If you are using SNMP open ports 161 and 162 3 Gain remote access to the transmitter by entering the IP address in a web browser s address field Your login remains active until the browser is closed 4 When properly configured the login menu see Figure 3 2 8 appears on ...

Page 39: ... default login username and password Nautel recommends that you change the password to improve overall system security See Changing the Password on page 3 2 125 Also you should change the OS operating system password which was a factory set unique password that is referenced on page 2 of your Proof of Performance documents Click Submit to accept your login parameters and display the remote AUI s H...

Page 40: ...s calibrate the exciter TCXO perform software upgrades configure the RF monitor output power lcokout settings and power threshold settings page 3 2 127 Menu Precorrection Settings Set critical pre correction settings such as mag phase delay B setpoint as well as perform AM AM correction AM PM correction envelope equalization and exciter synchronization page 3 2 114 Menu User Accounts Set user perm...

Page 41: ...21 Main Menu From the home page click the Menu button to view the Main Menu see Figure 3 2 9 From this page you can select one of 11 sub menus See Remote AUI Pages on page 3 2 20 for a summary of each sub menu and to a cross reference page for more detailed information Figure 3 2 9 Menu Page ...

Page 42: ...can view the NX5 s events log using the remote AUI s Log page see Figure 3 2 10 This page shows a configurable log of all transmitter events To view the Log page click the Log button in the bottom banner of any remote AUI screen Figure 3 2 10 Log page Page number of displayed page Selects item at top of current page Selects next lower page Scrolls up one item Scrolls down one item Selects next hig...

Page 43: ...hat column You can scroll through the list using the scroll bar if displayed or the up and down arrow buttons to the right of the page Up to 100 events can be displayed per page When there are more than 100 events a Page icon e g Page 1 2 will appear to allow viewing of further listings In this case click on Page select the desired page from the Select a Page window then click OK to view that page...

Page 44: ... to filter logs by date and frequency Copy Logs Click to copy the selected logs to the remote computer s clipboard Delete Click to remove all selected logged events Statistics Click to display statistical information about each event type present in the log Legend The Legend tab opens a read only display of alarm symbols to help you interpret the ones listed in the Logs page or in the Statistics w...

Page 45: ...able Rack events only RF Module displays applicable RF Module events only Click the Get Next Batch radio button to display the previously logged batch of events up to 2000 items for the device type selected Click the OK button or the Cancel button when done Click the Filter by Date radio button to filter events based on a selected date and time range and the device type selected Click the OK butto...

Page 46: ...selected list copied to the remote user s computer clipboard by clicking the Copy Logs button in the Log Manager see Figure 3 2 14 You can paste the tab delimited text copy of the logs into a text editing program such as Word Excel Notepad etc Click OK or Cancel to close this window and return to the Transmitter Log Figure 3 2 14 Log Manager Copy Logs ...

Page 47: ...5 Delete by date activates the date and time selection 24 hour clock where users can click the arrows to establish a date and time Log events older than this date will be removed from the events list Delete All removes all the logs in the list Click OK to accept the configuration or click Cancel button to close this window and return to the Transmitter Log Figure 3 2 15 Log Manager Delete Logs Mon...

Page 48: ...vice Controller Exciter Rack RF Module from which the event originated Event describes the event e g Local Remote switch Severity identifies the seriousness of the alarm see Viewing the Legend on page 3 2 29 Events reveals the number of occurrences for that event during the filtered period Earliest refers to the first time of an event within the filtered period Latest refers to the latest time of ...

Page 49: ...Viewing the Legend Click the Legend button in the Log Manager see Figure 3 2 17 to display a legend that describes the symbols shown in the State and Severity columns of the Logs page Click OK or Cancel to close this window and return to the Transmitter Log page Figure 3 2 17 Log Manager Legend ...

Page 50: ...at are currently active The View Logs screen shows a chronological list of all alarms up to 2000 that have occurred since the last time the logs were cleared Older events are discarded Use the up and down buttons to scroll through the list of alarms or logged events Refer to the NX5 Troubleshooting Manual to cross reference the alarm name to possible causes and troubleshooting tips When you select...

Page 51: ... options see Figure 3 2 19 close one of the existing instrument panels on the Home page by clicking X in the top right corner of the instrument panel and then click anywhere in the blank space This section includes the following topics Describing Instrument Panel Options on page 3 2 32 Viewing Instrument Panels on page 3 2 33 Instrument Panel Usage on page 3 2 33 Available Instrument Panels on pag...

Page 52: ...e compensation being applied to the phase signal See page 3 2 41 Signal Constellation For IBOC mode only Displays the phase and amplitude of the symbols being modulated within an OFDM sub carrier as dots on a cartesian graph Also displays timing and data carrier information See page 3 2 42 Lissajous Plot Displays a Lissajous figure that represents the resultant vector magnitude and phase for the a...

Page 53: ...nstellation see Figure 3 2 30 on page 3 2 42 To display a cursor in the panel which only applies to the Spectrum Analyzer Smith Chart EQ instruments AM AM Correction AM PM Correction and Power Distribution Plot click on the instrument panel where you want the cursor see Figure 3 2 21 on page 3 2 34 The cursor position and value are noted in the upper right hand corner of the panel e g frequency an...

Page 54: ... OPERATING THE TRANSMITTER PAGE 3 2 34 VERSION 0 1 2015 08 01 Figure 3 2 21 Instrument Cursor Manipulation Figure 3 2 22 Instrument Panel Expansion Example Cursor Tools to move cursor and display information Maximize Minimize buttons ...

Page 55: ...NRSC 2 B DRM and DRM AM standards ITU R SM 328 11 and ITU R SM 1541 4 IBOC and IBOC AM NRSC 5 C NOTE Any spurious emissions that are displayed are a product of the spectrum analyzer and are not actually present on the transmitter output Click on the panel to display a cursor on the trace in the approximate area The cursor position frequency and amplitude is shown in the upper right hand corner of ...

Page 56: ...500 Hz default is 300 Hz Decreasing this value provides better frequency resolution but will increase the sweep time Span determines the start and stop frequencies of the analyzer with the carrier frequency always at the center Set between 20 kHz and 300 kHz default is 150 kHz Averages determines the number of averages that the analyzer performs per sweep Set between 0 and 100 default is 19 Measur...

Page 57: ...EQ Frequency Response EQ Frequency Response See Figure 3 2 25 This panel displays the frequency response of the active exciter s equalization filter It displays the gain of the filter versus frequency as it applies to the magnitude of the modulating signal A dashed line is displayed at the 0 dB level Click on the panel to display a cursor in the approximate area on the trace The cursor position fr...

Page 58: ...ck on the panel to display a cursor in the approximate area The cursor position filter tap and magnitude is noted in the upper right hand corner of the panel Click in other areas of the instrument panel to provide a coarse adjustment of the cursor position Use the left and right buttons to make fine adjustments to the cursor position Use the up or down button to maximize if it was minimized or min...

Page 59: ...dth Click on the panel to display a cursor in the approximate area The cursor position frequency and delay is noted in the upper right hand corner of the panel Click in other areas of the instrument panel to provide a coarse adjustment of the cursor position Use the left and right buttons to make fine adjustments to the cursor position Use the up or down button to maximize if it was minimized or m...

Page 60: ...ays the amplitude correction being applied to the magnitude signal The x axis represents the input signal amplitude and the y axis represents the gain correction applied for a given amplitude value Click on the panel to display a cursor in the approximate area on the trace The cursor position LUT index and gain is noted in the upper right hand corner of the panel Click in other areas of the instru...

Page 61: ...e phase shift correction applied for a given amplitude value Click on the panel to display a cursor in the approximate area The cursor position LUT index and phase is noted in the upper right hand corner of the panel Click in other areas of the instrument panel to provide a coarse adjustment of the cursor position Use the left and right buttons to make fine adjustments to the cursor position Use t...

Page 62: ...e ideal data points Sub carrier group information is shown in the lower right section of the screen Displayed information includes the sub carrier group name the bandwidth that the selected carrier group occupies and the modulation error ratio MER for the selected carrier group MER quantifies the performance of the transmitted digital signal as the ratio between the RMS power of the ideal signal a...

Page 63: ...ing in stereo mode or not operating digital Left and right audio content is displayed for all other audio sources The plot consists of a group of sequential samples to allow signal analysis In L and R mode the L R portion of the signal tends to dominate the plot resulting in the majority of samples appearing in the lower left and upper right quadrants In I and Q mode signals that are of equal freq...

Page 64: ...load is being applied to the output of the transmitter Click on the panel to display a cursor in the nearest area on the trace showing the normalized impedance plot line The cursor position impedance and frequency is noted in the upper right hand corner of the panel Click in other areas of the instrument panel to provide a coarse adjustment of the cursor position Use the left and right buttons as ...

Page 65: ...ll show levels in DRM or IBOC mode only The level shown in yellow represents the currently measured peak modulation level with the RMS level shown in green An actual RMS value is displayed below the meter The red markers represent the most recently recorded maximum peak level The actual peak values are displayed in red below the meter For L R and I Q modulation both positive and negative peaks are...

Page 66: ...t bar graph levels are relative to the input level specified in the preset The level shown in yellow represents the currently measured peak amplitude with the RMS level shown in green An actual RMS value is displayed below the meter The red markers represent the most recently recorded peak level The actual peak value is displayed in red below the meter There are no interactive tools cursors fine c...

Page 67: ...rence representing the average power The y axis displays the probability of exceeding that power level This graph can be used to assess the distribution of a given signal and provides an indication of the amount of peak power capability required Click on the panel to display a cursor in the approximate area on the trace The cursor position power level and probability is noted in the upper right ha...

Page 68: ...Remote AUI The remote AUI can be used to display metered parameters on the Home page see Figure 3 2 36 if selected individually from the Meters List View page or saved in a meter list layout and set to default This section includes the following topics Describing the Meter Display on page 3 2 49 Accessing Meter Information on page 3 2 49 Identifying Meter Information on a Specific Sub device on pa...

Page 69: ...of a meter bar indicates the parameter is outside normal operating conditions Accessing Meter Information Procedures for accessing and editing information in the Meters section of the remote AUI To delete a meter from the Home page click X in the upper left corner of the meter to be deleted from the Meters window Figure 3 2 37 To review all the meter options click the meter list view shortcut butt...

Page 70: ...evice type Under Transmitter Layout click the information button i adjacent a device type Figure 3 2 38 on page 3 2 50 Figure 3 2 39 on page 3 2 51 Figure 3 2 40 on page 3 2 51 Figure 3 2 41 on page 3 2 52 and Figure 3 2 41 on page 3 2 52 The summary screen shows all available meters in tabular format NOTE When a meter value is updated a blue box briefly appears around that value Typically updates...

Page 71: ...NX5 OPERATION MAINTENANCE MANUAL OPERATING THE TRANSMITTER VERSION 0 1 2015 08 01 PAGE 3 2 51 Figure 3 2 39 Meters Information Display for the Exciter Figure 3 2 40 Meters Information Display for Rack 1 ...

Page 72: ...splayed text and the colour of the button which are controlled by three factors the status of the software enabled or disabled the status of the PDM cable plugged in or unplugged and the status of the module plugged in or unplugged as follows Enabled and green software is enabled PDM cable plugged in module plugged in Enabled and red software is enabled PDM cable unplugged module plugged in Disabl...

Page 73: ...or display on the Home page Open the Meter List Save window from the Home page using the floppy disk button Figure 3 2 43 Click Save As to save the currently displayed meters Enter a name in the Layout Name entry box and click OK Click Delete to discard the selected meter list Click Set Default to set the selected meter list as the default for the current user account The symbol shows the default ...

Page 74: ...ns are for viewing purposes only and do not offer the same level of analytical features as the remote AUI s Meter List View page see Figure 3 2 37 on page 3 2 49 Figure 3 2 44 View Meters Screens Use the up and down buttons to scroll through the meter sections Press the accept checkmark button to enter the meters screen for that section see Controller example in Figure 3 2 44 on page 3 2 54 Use th...

Page 75: ...rrier Power Total B DC Current Max Module Temperature Forward Carrier Power RF RMS Current Forward RMS Power RF Peak Current Forward Peak Power B Sample Reflected Carrier Power VSWR Reflected RMS Power External Sync Reflected Peak Power Carrier Impedance RF Carrier Voltage External Clock Frequency RF RMS Voltage Phase Offset RF Peak Voltage High Power Lockout Setpoint RF Carrier Current Phase Dela...

Page 76: ... open closed Maximum Module B Voltage Maximum Module RF Drive AC Sample Average Module B Voltage Average Module RF Drive Highest Avg PM Temp Minimum Module Modulation Minimum Module Temperature DC Current Maximum Module Modulation Maximum Module Temperature Rectifier Temperature Average Module Modulation Average Module Temperature 15 V Minimum Module PA Voltage Minimum Module Fan Speed 15 V Maximu...

Page 77: ...PWB is installed you can view various Exgine parameters NOTE The Exgine Statistics screen is for viewing purposes only Figure 3 2 45 View Exgine Statistics Screens Use the up and down buttons to scroll through the list of parameters noting that the following parameters are available for viewing State RXPkts RX Bytes Discards CRC Errors Seq Errors Clk Jitter DPLL Error PktBuffer MAC Address Display...

Page 78: ...eate 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 This section includes the following topics Editing Creating and Deleting Presets on page 3 2 59 Loading Presets on page 3 2 60 Activating Presets on page 3 2 60 Understanding the Preset Tabs on page 3 2 61 Figure 3 2 46 Presets Page General Tab shown ...

Page 79: ...e in the top banner To update the operation of the transmitter re activate the preset through the top banner see Activating Presets on page 3 2 60 On the Presets page an asterisk appears next to the preset name in the header when there are unsaved changes to the preset When changes are complete click the Save button or press X to discard If you are creating a new preset click the Save New button e...

Page 80: ...set and click the Load button to view or enable editing of the preset Click the Cancel button to close this window Select the desired preset and click the Load button to view or enable editing of the preset Activating Presets In the Transmitter block in the remote AUI s top banner click the bar that contains the active preset name and the drop down arrow see Figure 3 2 47 The Activate Preset windo...

Page 81: ...balanced analog audio input is used for AM modulation AES2 input Digital AES input must be used for I Q stream from the DRM modulator If AES is used for AM modulation either AES input may be used for either input AM modulation and DRM I Q stream IBOC transmits an AM IBOC standard signal carrier amplitude modulated with audio and upper and lower sidebands of OFDM IBOC carriers Requires an Exgine to...

Page 82: ...vel from the audio player in dBFS that will result in 100 modulation depth Format Options are AM Carrier transmits carrier only ignores audio inputs Mono L R adds L R channels on AES signal Mono L transmits L channel of AES signal or Bal Analog Mono R transmits R channel of AES signal Stereo C QUAM uses AES L and R channels to generate amplitude and phase modulation and transmit a stereo AM signal...

Page 83: ...ts the gain applied to the carrier power when no modulation is applied maximum is 1 76 dB and the Max Carrier Timeout will cause the carrier power to drop to the setpoint after two 2 minutes with no modulation applied See Selecting the DCC mode on page 3 2 70 for more information on each mode AMSS Amplitude Modulation Signalling System Allows low bit rate data to be transmitted with the Analog AM ...

Page 84: ... the AM carrier power and the RMS power of the DRM carriers The level is approximately based on the input signal to the exciter and may require adjustment to obtain the exact level Set between 0 dB and 40 dB Envelope Conditioning In DRM mode only applies a proprietary correction to the envelope to improve spectral performance but will negatively affect MER For IBOC and IBOC AM modes IBOC Service M...

Page 85: ... Audio Loss alarm Inhibit inhibits the RF output fans and B voltage until the audio returns or Change Preset changes the active preset Mod Loss Preset displayed only if Action is set to Change Preset Select the preset from the drop down list that will activate upon the loss of a modulating signal Timeout Minutes sets the delay in minutes between audio loss detection and the resulting action Enter ...

Page 86: ...NCE MANUAL OPERATING THE TRANSMITTER PAGE 3 2 66 VERSION 0 1 2015 08 01 Figure 3 2 48 Presets Analog Settings Figure 3 2 49 Presets Digital Settings Overall Mode DRM Figure 3 2 50 Presets Digital Settings Overall Mode DRM AM ...

Page 87: ...CE MANUAL OPERATING THE TRANSMITTER VERSION 0 1 2015 08 01 PAGE 3 2 67 Figure 3 2 51 Presets Digital Settings Overall Mode IBOC Figure 3 2 52 Presets Digital Settings Overall Mode IBOC AM Figure 3 2 53 Presets Tabs Audio Loss ...

Page 88: ...r Digital Settings set IBOC Service Modeto MA 1 Hybrid set Enhanced Carriers to Low set Digital Carriersto On set Analog Bandwidthto 5kHz set Analog Transmissionto On Preset Examples Analog Preset 1 Enter Output Power field with desired power level 2 Set Overall Mode to Analog AM 3 Under Analog Settings set AM Source as required typically Analog AES set Format as required typically Mono L R enter ...

Page 89: ...s Preset field select the desired preset from the drop down list This is the preset that will activate upon a modulation loss 5 Set the remaining mod loss timeout fields See Audio Loss on page 3 2 65 6 Save the preset with the desired name new or existing See Editing Creating and Deleting Presets on page 3 2 59 Preset Examples DRM Preset 1 Enter Output Power field with desired power level 2 Set Ov...

Page 90: ...lectable options are AMC see Figure 3 2 54 EAMC see Figure 3 2 55 on page 3 2 71 DAM basic see Figure 3 2 56 on page 3 2 71 DAM Full see Figure 3 2 57 on page 3 2 72 DCC1 see Figure 3 2 58 on page 3 2 72 Once a DCC curve has been selected the desired Max DCC Compression level can be entered This setting defines the maximum reduction in carrier or carrier and sideband power for a given curve Standa...

Page 91: ...NX5 OPERATION MAINTENANCE MANUAL OPERATING THE TRANSMITTER VERSION 0 1 2015 08 01 PAGE 3 2 71 Figure 3 2 55 EAMC Figure 3 2 56 Basic DAM ...

Page 92: ...NX5 OPERATION MAINTENANCE MANUAL OPERATING THE TRANSMITTER PAGE 3 2 72 VERSION 0 1 2015 08 01 Figure 3 2 57 Full DAM Figure 3 2 58 DCC1 ...

Page 93: ...should not change It performs the reduction in power in such a way that it tends to be masked by the audio If AMC is not being used consider DAM mode as a second choice although the power savings will be significantly less If the station is operating with less audio processing or has more silent periods the DAM algorithms will tend to save more power However the basic DAM characteristic will impac...

Page 94: ...Select Preset screen Use the up and down buttons to scroll through the existing presets Press the accept checkmark button to enable the preset as the transmitter s active preset Press the cancel X button to return to the previous menu Editing or Creating Presets When you select User Settings Edit Presets from the Main Menu see Figure 3 2 60 you can create up to 63 operating presets or edit existin...

Page 95: ...checkmark button to enter the selected editing menu screen Press the cancel X button to return to the previous menu NOTE Parameters that can be edited using the front panel UI are detailed in the following paragraphs These parameters can also be edited using the remote AUI which are described in Managing Presets Using the Remote AUI on page 3 2 58 see that section for more details on a specific pa...

Page 96: ...e change For analog only transmitters FM analog mode only the maximum power setting is kW Press the cancel X button to discard changes and return to the previous menu Overall Mode When you select Overall Mode from the Preset editing options screen you can select the overall operating mode of the transmitter see Figure 3 2 64 Figure 3 2 64 Overall Mode screen Use the up and down buttons to locate t...

Page 97: ...ncel X button to discard changes and return to the previous menu Audio Options When you select Audio Options from the Preset editing options screen you can edit various main audio parameters see Figure 3 2 66 Figure 3 2 66 Audio Options menu Use the up and down buttons to scroll through the audio options then press the accept checkmark or right arrow button to enter the selected editing screen Fig...

Page 98: ... L R AM Carrier Stereo C QUAM Mono R or Mono L then press the accept checkmark button to save the change Press the cancel X button to discard changes and return to the previous menu Use the up and down buttons to toggle between 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 previous menu Default setting is OFF Use ...

Page 99: ... select the desired mode None AMC EAMC DAM DAM Full or DCC1 then press the accept checkmark button to save the change Press the cancel X button to discard changes and return to the previous menu Use the up and down buttons to toggle between Enable or Disable then press the accept checkmark button to save the change Press the cancel X button to discard changes and return to the previous menu Defaul...

Page 100: ...n select various parameters for a DRM or DRM AM preset see Figure 3 2 70 Enter the desired sub menu and use the up and down buttons to edit the parameter setting or value then press the accept checkmark button to save the change See Digital Settings on page 3 2 64 for details on each DRM setting Press the cancel X button to discard changes and return to the previous menu Figure 3 2 69 DRM Settings...

Page 101: ...preset see Figure 3 2 70 Enter the desired sub menu and use the up and down buttons to edit the parameter setting or value then press the accept checkmark button to save the change See Digital Settings on page 3 2 64 for details on each IBOC setting Press the cancel X button to discard changes and return to the previous menu Figure 3 2 70 IBOC Settings screens Displayed for IBOC mode Displayed for...

Page 102: ...reen you can edit the parameters related to a loss of modulation see Figure 3 2 72 Figure 3 2 72 Mod Loss menu Use the up and down buttons to move the cursor to the desired mod modulation loss menu item and then press the right button to enable editing of the item Figure 3 2 73 on page 3 2 83 shows all the editing screens for the Mod Loss menu Within any of the editing screens use the up and down ...

Page 103: ...Press the cancel X button to discard changes and return to the previous menu Default threshold is 0 Sets the time period of low modulation based on the thresh old setting after which the transmitter will take action Use the up and down arrows to select a value between 0 and 240 minutes in 1 minute increments then press the accept checkmark button to save the change Press the cancel X button to dis...

Page 104: ...changes and return to the previous menu Resetting Alarms You can attempt to reset any latching transmitter alarms that are holding the transmitter in an off air state using the remote AUI s Reset button see page 3 2 17 or using the local front panel display see Resetting Alarms Using the Front Panel Resetting Alarms Using the Front Panel When you select Reset Alarms from the Main Menu you can atte...

Page 105: ...id in fault diagnosis To view the Transmitter Status page click the Status button in the remote AUI s bottom banner Click X to return to the home page You can also use the local front panel UI to view active alarms see Transmitter Alarms and Log Using the Front Panel UI on page 3 2 30 This section includes the following topics Viewing Alarm Details on page 3 2 86 Status Button Colour Indications o...

Page 106: ...eshooting Manual Status Button Colour Indications When the Status button is red one or more active alarms are indicating that the transmitter may be in an off air state When the Status button is amber one or more active alarms are indicating that the transmitter is still on air but may be at reduced power When the Status button is green no alarms are being reported and the transmitter is operating...

Page 107: ...Email Configuration on page 3 2 93 Notifications on page 3 2 95 Configuring Exgine Settings on page 3 2 97 SNMP Configuration on page 3 2 100 Capturing Critical Parameters on page 3 2 102 Setting the Clock on page 3 2 103 Configuring NTP Servers on page 3 2 106 Configuring Exgine Settings on page 3 2 97 Setting Call Sign ID on page 3 2 110 NOTE The front panel UI also has a User Settings menu whic...

Page 108: ...el UI to ensure you can log in after changes have been made Determining DHCP Setting One of the main decisions in configuring the network connection on your NX5 transmitter is whether you enable or disable DHCP If you are connecting to a network consult with a network administrator before connecting the transmitter to your network to determine whether to enable or disable the DHCP setting When DHC...

Page 109: ...parameter and then press the right button to enable editing of the setting Within any of the editing screens use the left and right buttons to select a character for editing and then use the up and down buttons to edit a setting Press the accept checkmark button to save the change Press the cancel X button to discard changes and return to the previous menu NOTE A nameserver also called a DNS trans...

Page 110: ...ABLE specify the address If DHCP was set to ENABLE this screen is for display purposes only Masks an IP address and divides the IP address into network address and host address If DHCP was set to DISABLE specify netmask Typical netmask address shown Consult with your network administrator If DHCP was set to ENABLE this screen is for display purposes only Used to identify the senders and receivers ...

Page 111: ...s XP Adapt as required for computers with different operating systems 3 On the laptop go to Start Menu Control Panel Network Connections Local Area Network 4 In the Local Area Network Status open the General tab and choose Properties Scroll down and highlight Internet Protocol TCP IP Choose Properties 5 In the Internet Protocol TCP IP Properties window select Use the following IP address 6 Enter t...

Page 112: ...re 3 2 78 on page 3 2 88 You must be have remote control enabled to edit network settings using the remote AUI The MAC Address and Status fields are read only they cannot be edited You must select Static IP to be able to edit the IP Address Subnet Mask Default Gateway and Nameserver fields If you are in DHCP mode these fields will be assigned automatically The Status field identifies the status of...

Page 113: ... notification feature is used see Notifications on page 3 2 95 NOTE Nautel recommends that the following settings be entered vetted by a qualified Network Administrator Figure 3 2 81 Email Configuration page To configure the email feature perform the following steps 1 Open the User Settings page by clicking Menu User Settings in the Home page 2 Select the Email Configuration option left side of th...

Page 114: ...Address Enter as a standard email address e g a b com This will be the sender address that notification email recipients will see Free web based email service accounts Gmail Hotmail Yahoo mail etc are acceptable here Authentication Required If your email server requires authentication to send emails select the check box and enter the appropriate Username and Password to allow this If the check box...

Page 115: ...e Notifications list e g LVPS Failures Click Add to create a new item for notification click Edit after highlighting an existing item to edit an existing item or click Delete to erase an item 2 When you click Add or Edit the screen in Figure 3 2 83 will appear This screen allows you to add or edit a Notification Name Recipient Email and define the alarm list by Device type Controller Exciter A or ...

Page 116: ...NX5 OPERATION MAINTENANCE MANUAL OPERATING THE TRANSMITTER PAGE 3 2 96 VERSION 0 1 2015 08 01 Figure 3 2 83 Notifications adding updating page ...

Page 117: ...meters are changed and the remote AUI is reset record the new values or see the local front panel UI to ensure you can log in after changes have been made Exgine Settings Using the Front Panel UI From the transmitter s front panel in local mode you can set or change Exgine settings To view the Exgine Settings screen select User Settings Exgine Settings from the Main Menu See Figure 3 2 84 on page ...

Page 118: ...poses only Enter the Exporter s IP address of the interface where the data stream is originating It is used to filter E2X traffic in case multiple exporters are used in broadcast mode on a single LAN 0 0 0 0 is also a valid configuration The Exgine expects E2X on port 9000 Some non Nautel Exporters utilize port 11000 instead Configure the Exgine s IP network parameters as assigned by the local net...

Page 119: ...ng to the Exporter configuration Exgine IP Netmask and Gateway Configure the Exgine s IP network parameters as assigned by the local network administrator If no gateway is used or assigned enter 0 0 0 0 Exporter IP Enter the Exporter s IP address of the interface where the data stream is originating It is used to filter E2X traffic in case multiple exporters are used in broadcast mode on a single ...

Page 120: ... 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 Read Community Enter the password for the SNMP client application to allow acquisition of channel values Provide confirmation of this password in the Confirm field Write Community Enter the password for the SNMP client application to allow chang...

Page 121: ...k Undo to restore the previous settings Figure 3 2 87 SNMP Configuration page Traps tab shown Traps Settings A trap is an unsolicited message sent by an SNMP agent to an SNMP client when an alarm changes state turns on or off The message is an SNMP packet that can be interpreted and displayed by an SNMP client application Using the Traps tab see Figure 3 2 87 select your desired traps as follows 1...

Page 122: ...page From this page you can click Capture Meters reads all meter values Capture Alarms reads all active alarms Capture Presets reads current preset and Capture Settings reads current settings e g active exciter threshold settings scale factors etc Once you click the Capture button you can click the associated Copy button to copy the data to your remote PC s clipboard The data copies in a tab delim...

Page 123: ...the Clock Using the Remote AUI or using the local front panel UI see Setting the Clock Using the Front Panel on page 3 2 105 If you change the clock setting on the front panel UI it will also be reflected on the remote AUI and vice versa If the NTP feature is enabled see Enabling NTP on page 3 2 107 the clock will set automatically and cannot be manually adjusted Setting the Clock Using the Remote...

Page 124: ...he hour 24 hour clock minutes up to 60 and seconds up to 60 Date select values from the drop down menus beside Day Month and Year 3 Enter the following location parameters and click Apply Click Cancel to discard changes Timezone automatically set based on Region Country and Zone selections Region select the appropriate region from the drop down menu Country select the appropriate country from the ...

Page 125: ... the time or date use the right and left arrow buttons to move the cursor to the desired field hours minutes seconds year month day and use the up and down arrow buttons to increase or decrease the value of the selected field as desired When complete press the accept checkmark button to save the change Press the cancel X button to discard changes and return to the previous menu The time zone offse...

Page 126: ... the front panel UI see Enabling NTP on page 3 2 107 You can configure one or more NTP Network Time Protocol servers to allow clock synchronization with all computers on the same network as the NX5 To view the remote AUI s NTP Servers page see Figure 3 2 91 selecting NTP Servers from the User Settings options There are several functions available on this page enabling NTP monitoring NTP server sta...

Page 127: ...ply button to activate any change From the front panel UI s User Settings NTP Sync screen see Figure 3 2 92 enable the NTP function by setting NTP Sync to ON Disable by setting NTP Sync to OFF To change the setting use the up and down arrow buttons to toggle between ON and OF default is OFF Press the accept checkmark button to save the change Press the cancel X button to discard changes and return...

Page 128: ... marks high quality candidates for the reference time that could be used if the currently selected reference becomes unavailable IP Displays the IP address associated with the Remote Name In some cases the Remote Name could be the IP address Delay Displays the round trip delay in ms of the time queries Offset Displays the difference in ms between the reference time and the system clock Jitter Disp...

Page 129: ...e Home from the User Settings options Figure 3 2 94 Nautel Phone Home Page If desired click the Enable Participation in Phone Home checkbox to enable participation This will prompt you to enter two more fields Serial Number Call Sign required field and Contact Email optional Click Apply to save the changes Click Cancel to return the fields to their previous setting if you click Apply Nautel will r...

Page 130: ... ID page see Figure 3 2 95 select Call Sign ID from the User Settings options This identification will be displayed in brackets on the top transmitter banner of the remote AUI and also be included as a header in any Critical Parameter data copied and pasted to a spreadsheet program see Capturing Critical Parameters on page 3 2 102 Enter the call sign or ID in the field e g WXYZ and click Apply max...

Page 131: ...t Panel UI on page 3 2 89 Exgine Settings see Exgine Settings Using the Front Panel UI on page 3 2 97 Configure Test Signal Generator see Configure Test Signal Generator see page 3 2 112 Scheduler see Enabling the Scheduler Front Panel UI on page 3 2 175 NOTE The remote AUI also has a User Settings menu which contains similar functions to the front panel UI e g network setup Exgine settings settin...

Page 132: ...Settings Signal Gen from the Main Menu see Figure 3 2 96 Figure 3 2 96 Signal Generator Menus Use the up and down buttons to move the cursor to the desired line item and then press the right button to enable editing Figure 3 2 97 on page 3 2 113 shows all possible editing screens for the Signal Gen menu Within any of the editing screens use the up and down buttons to edit the setting Press the acc...

Page 133: ...elect a type None White Noise Tone Sweep or Single Tone Press the cancel X button to discard changes and return to the previous menu When Type is set to Tone Sweep select a stop frequency between 1 and 25 kHz Press the cancel X button to discard changes and return to the previous menu Default is 1 kHz When Type is set to Tone Sweep select a time between 0 and 60 s Press the cancel X button to disc...

Page 134: ...based on the desired modes of operation and should not require user adjustment This section includes the following topics Mag Phase Delay on page 3 2 115 B Setpoint on page 3 2 116 AM AM Correction on page 3 2 117 AM PM Correction on page 3 2 118 Envelope Equalization on page 3 2 119 Configurations on page 3 2 120 Exciter Synchronization on page 3 2 122 Figure 3 2 98 Precorrection Settings Page To...

Page 135: ...margin under the mask Typically the delay is set between 0 and 1 us Use the spectrum analyzer instrument panel displayed in this section to verify applied changes are satisfactory The value is factory set and changes are not typically required unless the antenna load network has changed Minor adjustments may be required to optimize IBOC or DRM spectral performance If so enter the Phase Delay value...

Page 136: ... 116 VERSION 0 1 2015 08 01 B Setpoint The remote AUI s B Setpoint page see Figure 3 2 100 allows you to identify the B Setpoint nominally 400 V This value does not normally require user adjustment Figure 3 2 100 Precorrection B Setpoint Enter the value and click Apply ...

Page 137: ...ot cause a linearly proportional change in output amplitude By applying a test signal and monitoring the output of the transmitter the exciter will generate a table of values describing the required gain versus input signal level in an attempt to find the inverse curve to the AM AM non linearity and provide a more linear amplifier Applying the proper AM AM correction will result in lower audio dis...

Page 138: ...mplitude causes a change in phase By applying a test signal and monitoring the output of the transmitter the exciter will generate a table of values defining the required phase offset versus input signal level in an attempt to find the inverse curve to the AM PM non linearity and provide a more linear amplifier Applying the proper AM PM correction will result in better spectral performace in digit...

Page 139: ...t signal and monitoring the output of the transmitter the exciter will use an LMS Least Mean Squares algorithm to generate a filter in an attempt to find a complementary response to the frequency response of the magnitude path out to approximately 70 kHz Applying the proper equalization curve will result in a flatter frequency response and improved spectral performance in digital modes of operatio...

Page 140: ...he Configurations page see Figure 3 2 104 allows users to group the parameters that appear within the Precorrection Settings menu Figure 3 2 104 Precorrection Configurations Edit button appears for local users in Local mode or for remote users in Remote mode View button appears otherwise cannot edit in this case ...

Page 141: ... You must have Administrator user account permission to edit add or delete configurations 3 If you click Edit View or Add the Configuration Details window appears see Figure 3 2 104 on page 3 2 120 In this screen you can enter or select the appropriate parameters for your desired configuration including Name Mag Phase Delay B Level AM AM Curve AM PM Curve and EQ Curve When you are finished editing...

Page 142: ...es and configurations are created they are stored in the active exciter It may be necessary to copy these settings to the standby exciter or in some cases to an exciter that has been replaced Figure 3 2 105 Precorrection Exciter Synchronization Items in green indicate the correction curve or configuration is identical for both exciters Items in red indicate a difference or a correction curve or co...

Page 143: ...assigned to a given user some features shown in Figure 3 2 106 may not be displayed or available This section includes the following topics Setting User Permission Level on page 3 2 124 Editing Account Information on page 3 2 124 First Time Login on page 3 2 126 Figure 3 2 106 User Accounts page The NX5 contains a default user account when it leaves the factory This account appears as Nautel Auto ...

Page 144: ...use this function Procedure to add a user see Figure 3 2 107 on page 3 2 126 1 Open the User Accounts page 2 Click Add bottom of the screen to open a small Add User window 3 Beside Username enter a name that identifies the new user and click OK 4 Select the new user to edit the settings 5 Beside User Type click the arrow to reveal a drop down menu and select a type of user If you select Custom as ...

Page 145: ...nging Permissions You must be an Administrator to edit this function All users have permission to change their own username and password You can customize the permissions assigned to a user or simply pick a predetermined set of permissions based on the user type Procedure to change user permissions see Figure 3 2 107 on page 3 2 126 1 Open the User Accounts page 2 Select a user from the Users list...

Page 146: ... the Delete button A verification prompt will appear Click Yes to proceed or No to cancel the deletion NOTE Do not delete the SNMP_User account from the list of users Figure 3 2 107 User Accounts Page Layout First Time Login When you enter the User Accounts page for the first time it is recommended you create an account and then delete the default Nautel account as follows 1 Log in to the remote A...

Page 147: ... the front panel UI The front panel UI s System Settings menu contains additional settings that are described in User Settings Front Panel UI on page 3 2 111 The remote AUI s System Settings page see Figure 3 2 108 is accessible from the Main Menu options It contains the following options Reset on page 3 2 128 Upgrade Software on page 3 2 129 Exciter Clock Calibration on page 3 2 130 RF Monitor Le...

Page 148: ...he remote AUI click the Reboot AUI button This will function with remote control enabled or disabled After the reboot delay you must log in to the remote AUI again To reset the active exciter click the Reboot Active Exciter button if the button is available highlighted NOTE If the active exciter is reset a brief interruption in transmitter operation will occur Click X in the upper right corner to ...

Page 149: ...are If an upgrade file is selected the screen shows a comparison between the installed version and the selected upgrade by component Identical versions are shown in green different versions are shown in red You can also view the details of the previous upgrade by clicking the View Last Upgrade checkbox History displays a window containing a history of the upgrades to the software Click the button ...

Page 150: ...WB with an antenna Figure 3 2 111 System Settings Exciter Clock Calibration Procedure to calibrate the exciter clock 1 Select the Exciter Clock Calibration option from the left side of the System Settings page to open a related window on the right side of the page 2 Connect an external 10 MHz source to A4J1B verify a value near 10 MHz displays in both External Clock Frequency fields and click Cali...

Page 151: ...onitor output level decrease the gain to decrease the RF monitor output level The transmitter will attempt to maintain this level at all power set points Figure 3 2 112 System Settings RF Monitor Level Procedure to set the RF monitor level 1 Select the RF Monitor Level option from the left side of the System Settings page to open a related window on the right side of the page 2 Observe the Current...

Page 152: ...power limits represent RMS power If the active preset set point is greater than the active lockout limit a High Power Lockout alarm will appear on the Transmitter Status page For basic transmitter operation you must configure and enable at least one of the eight high power limits Max Power Lockout 1 is factory set for the transmitter s maximum output power Set up a power lockout using the remote A...

Page 153: ...h of the two thresholds Low Forward Power Threshold 1 and Low Forward Power Threshold 2 on the Transmitter Status page Figure 3 2 114 System Settings Power Thresholds 1 Select Power Thresholds from the left side of the System Settings page to open a related window on the right side of the page 2 Enter the desired low power threshold level for each of the two options noting the level represents the...

Page 154: ...n page 3 2 139 Exciter Sync see Exciter Synchronization on page 3 2 140 RF Monitor see RF Monitor Settings on page 3 2 142 Power Lockout see Power Lockout Settings on page 3 2 143 Power Thresholds see Power Threshold Settings on page 3 2 145 PM Inhibit see PM Inhibit on page 3 2 146 NOTE The remote AUI also has a System Settings menu which contains similar functions to the front panel UI e g host ...

Page 155: ...cted logged in will be logged out From the front panel UI you can reset the host on the control interface PWB To view the Host Reset screen select System Settings Host Reset from the Main Menu see Figure 3 2 116 Figure 3 2 116 Host Reset Screen Use the up and down buttons to toggle between Force Host Reset and Cancel Press the accept checkmark button to save the change If a reset is selected it wi...

Page 156: ... and OFF disabled Press the accept checkmark button to save the change Press cancel X to discard changes and return to the previous menu OS Recovery NOTE An OS recovery reset can restore the transmitter s operating system It should only be required if a problem occurs during a software upgrade This feature is only available using the front panel UI From the front panel UI you can perform a recover...

Page 157: ...mitter To perform a firmware update select System Settings Firmware from the Main Menu see Figure 3 2 119 Figure 3 2 119 Firmware Update Menu Screens In the FW Version screen use the up and down buttons to scroll through the list of existing firmware versions installed in the transmitter Ctrl CPLD ExA etc Press X to return to the Firmware menu In the Update FW screen use the up and down buttons to...

Page 158: ...rightness of the display s backlight during normal use LED Timeout sets a time delay after a period of non use that the brightness of the display s backlight will dim This feature can also be disabled Menu Timeout sets a time delay after a period of non use that the front panel screen will revert back to the main menu Use the up and down buttons to move the cursor to the desired display setting an...

Page 159: ... disabled i e no timeout or select a time period between 0 and 1800 seconds 30 minutes in 5 s increments Press the cancel X button to discard changes and return to the previous menu Default setting is 900 s 15 minutes Select a time period between 1 and 60 minutes in 1 minute increments Press the cancel X button to discard changes and return to the previous menu Default setting is 10 minutes Select...

Page 160: ...ter Sync from the Main Menu see Figure 3 2 123 Figure 3 2 123 Exciter Sync Menu Use the up and down buttons to move the cursor to the desired line item and then press the right button to enable editing Figure 3 2 124 on page 3 2 141 shows all possible editing screens for the Exciter Sync menu Within any of the editing screens use the up and down buttons to edit the setting Press the accept checkma...

Page 161: ...ot present Press the cancel X button to discard changes and return to the previous menu Select a source type None 10 MHz Sync input GPS Sync Card or Combiner Press the cancel X button to discard changes and return to the previous menu Displayed only when the Source is set to Combiner Select a phase offset between 180 and 180 degrees in 0 001 degree increments Press the cancel X button to discard c...

Page 162: ... and then press the right button to enable editing Figure 3 2 126 shows the two editing screens for the RF Monitor menu Within either of the editing screens use the up and down buttons to edit the setting Press the accept checkmark button to save the change Press cancel X to discard changes and return to the previous menu Figure 3 2 126 RF Monitor Editing Screens Select a gain between 0 and 21 dB ...

Page 163: ...de the displayed power limits represent RMS power If the active preset set point is greater than the active lockout limit a High Power Lockout alarm will appear on the Transmitter Status page Figure 3 2 127 Power Lockout Menu Use the up and down buttons to move the cursor to the desired line item and then press the right button to enable editing Figure 3 2 128 shows the two editing screens for the...

Page 164: ...ckout from the Main Menu System Settings Power Lockout screen 2 Select the desired Active Lockout Power Lockout 1 through 8 Press the accept checkmark button to save the change Press X to return to the previous menu 3 Enter the appropriate Power Lockout screen for the active lockout selected in step 2 Select the desired high power limit for the active lockout noting it will represent the maximum a...

Page 165: ...reshold and then press the right button to enable editing Figure 3 2 130 shows the two editing screens for the Power Thresholds menu Within either of the editing screens use the up and down buttons to edit the setting Press the accept checkmark button to save the change Press cancel X to discard changes and return to the previous menu Figure 3 2 130 Power Thresholds Editing Screens Select the low ...

Page 166: ...allows the user to locally disable any of the four power modules in the transmitter Use the up and down buttons to move the cursor to the desired power module and then press the right button to enable editing See Figure 3 2 131 Use the up and down buttons to select Enable or Disable Press the accept checkmark button to save the change Press cancel X to discard changes and return to the previous me...

Page 167: ... panel UI s Factory Settings menu or the remote AUI s Factory Settings page see Figure 3 2 132 Figure 3 2 132 Factory Settings Menus WARNING Factory settings are established at Nautel and should not require adjustment These settings affect critical system protections Making changes to these settings may void your warranty Contact Nautel before making changes For future reference record a parameter...

Page 168: ...r Calibration on page 3 2 153 RF Symmetry Adjustment on page 3 2 154 SWR Threshold Adjustment on page 3 2 156 Transmitter Type on page 3 2 158 Transmitter Frequency on page 3 2 159 PDM Settings on page 3 2 161 NOTE Most factory settings can be adjusted using either the front panel UI or the remote AUI Where applicable this section describes both methods There are additional factory settings that a...

Page 169: ...The remote AUI s Audio Inputs page see Figure 3 2 133 displays the measured level of the Balanced Analog source in dBm The Balanced Calibration field allows for establishing a reference from a known source Once a calibration value has been determined and entered click the Apply button to save the changes Figure 3 2 133 Factory Settings Audio Inputs Page WARNING Factory settings are established at ...

Page 170: ...al screen see Figure 3 2 134 displays the level of the analog audio source in dBm Figure 3 2 134 Factory Settings Audio Cal Screen Use the up and down buttons to increase or decrease the audio calibration level between 10 and 12 dBm in 0 01 dBm increments Press the accept checkmark button to save the change Press cancel X to discard changes and return to the previous menu ...

Page 171: ...e 3 2 135 displays the B Limit Setpoint high voltage alarm level nominally 420 V the measured B levels and a B Calibration Value field The calibration field allows you to enter a measured B voltage to calibrate the B based on an externally measured B level Save changes to the B Limit Setpoint value or the B Calibration Value by clicking the appropriate Apply button Figure 3 2 135 Factory Settings ...

Page 172: ...red item and then press the right button to enable editing Figure 3 2 137 shows the two editing screens for the B Settings menu Within either of the editing screens use the up and down buttons to edit the setting Press the accept checkmark button to save the change Press cancel X to discard changes and return to the previous menu Figure 3 2 137 B Settings Editing Screens Set the B limit setpoint f...

Page 173: ...nt Nautel sets these values at the factory Value changes are not typically required unless you are performing a frequency change Figure 3 2 138 Factory Settings Forward Reflected Power Page Attempting to turn off Disable the SWR Protection will display the following WARNING prompting you to confirm your selection WARNING Factory settings are established at Nautel and should not require adjustment ...

Page 174: ...F Symmetry Using the Remote AUI The RF Symmetry page see Figure 3 2 139 allows entering RF symmetry values for exciter A or B to attempt to minimize second harmonic content when operating on each exciter Values are factory set and should not require adjustment Figure 3 2 139 Factory Settings RF Symmetry Page WARNING Factory settings are established at Nautel and should not require adjustment These...

Page 175: ...tory Settings RF Symmetry Menu Use the up and down buttons to select the desired exciter A or B for RF symmetry adjustment Figure 3 2 137 shows the editing screens for the Exciter A menu Within this editing screen use the up and down buttons to edit the setting Press the accept checkmark button to save the change Press cancel X to discard changes and return to the previous menu Figure 3 2 141 RF S...

Page 176: ...lds page see Figure 3 2 142 displays the threshold values for Peak Reflected Limit RMS Reflected Limit Peak RF Current Limit Peak Reflected Scale and Fast SWR Shutback The peak reflected scale value has an associated calibration routine which is initiated using the Start button Value changes and calibrations are not typically required Figure 3 2 142 Factory Settings SWR Thresholds Page WARNING Fac...

Page 177: ...esholds Using the Front Panel UI The front panel UI s SWR Thresholds menu see Figure 3 2 143 allows the enabling disabling of the SWR protection circuitry and the setting of various SWR threshold levels Value changes are not typically required Figure 3 2 143 Factory Settings SWR Thresholds Menu WARNING Attempting to disable the SWR protection or start the reflected scale calibration routine will d...

Page 178: ...THE TRANSMITTER PAGE 3 2 158 VERSION 0 1 2015 08 01 Transmitter Type NOTE This setting is displayed on the NX5 s remote AUI but is not user adjustable It is set at the factory during testing Figure 3 2 144 Factory Settings Transmitter Type Page ...

Page 179: ...ot change the carrier frequency unless you are performing a frequency change procedure Adjusting Transmitter Frequency Using the Remote AUI The remote AUI s Transmitter Frequency page see Figure 3 2 145 displays the precise carrier frequency of the transmitter Click the Apply button to save changes Figure 3 2 145 Factory Settings Transmitter Frequency Page WARNING Factory settings are established ...

Page 180: ...equency screen see Figure 3 2 146 displays the precise carrier frequency of the transmitter Figure 3 2 146 Factory Settings Frequency Screen Use the up and down buttons to increase or decrease the carrier frequency between 520 and 1710 kHz in 1 Hz increments Press the accept checkmark button to save the change Press cancel X to discard changes and return to the previous menu ...

Page 181: ...on is based on the PDM configuration of the transmitter and is set at the factory during product testing PDM Phase Calibration may be required after replacing or moving RF power modules See the Replacing a Power Module section of the NX5 Troubleshooting Manual for more information Figure 3 2 147 Factory Settings PDM Settings Page Attempting to Start the Minimization Routine will display the follow...

Page 182: ...t button to enable editing Figure 3 2 149 shows the two editing screens for the PDM Settings menu Within the PDM Offset screen use the up and down buttons to edit the setting Press the accept checkmark button to save the change Press cancel X to discard changes and return to the previous menu Within the Minimization screen press the accept checkmark button to begin the minimization routine Perform...

Page 183: ... Refer also to the NX5 Pre installation Manual for information on remote inputs and outputs and their factory default settings Remote I O Settings Using the Remote AUI To view the Remote I O page see Figure 3 2 150 select Remote I O from the Menu options Click X in the upper right corner to close this page and return to the home page Figure 3 2 150 Remote I O Page Inputs tab selected Click the Rem...

Page 184: ... as follows Figure 3 2 151 Remote I O Input Parameters 1 On the left side of the page select the desired digital input 1 through 10 from the list Note you can configure digital inputs 1 through 10 for one of a variety of control inputs 2 On the right side of the page assign a name to the digital input by clicking the Channel bar and selecting one of the following options Not Assigned has no effect...

Page 185: ...w or trailing edge de activates the input next logic 0 low or trailing edge activates the input Rising Edge Toggle Logic 1 high or rising edge activates the input next logic 1 high or rising edge de activates the input Rising Edge Turn On Set To B Falling Edge Turn Off Set To A Logic 1 high or rising edge activates the input logic 0 low or trailing edge de activates the input Falling Edge Turn On ...

Page 186: ...ariety of monitoring outputs 2 On the right side of the page assign a name to the remote output by clicking Channel and selecting one of the following options Not Assigned No alarm or status parameter is monitored Remote Enabled Active logic level indicates remote control is enabled i e local plus remote Inactive logic level indicates the transmitter is in local control RF On Off Active logic leve...

Page 187: ...te Input Mimics the logic of the associated remote input selection Example If Remote Output 5 is set to Remote Input it will mimic the logic received on remote input pin 5 This is typically used for debugging remote inputs Invalid Preset Active logic level indicates the current active preset is not a saved preset Preset name Active logic level indicates that the associated preset is active 3 The L...

Page 188: ...on page 3 2 170 or Analog Outputs see Monitoring Analog Outputs on page 3 2 171 to view or edit detail on the selected inputs or outputs Remote Inputs Front Panel UI Using the Remote Inputs screens see Figure 3 2 154 on page 3 2 169 you can configure up to 10 digital inputs that allow you to remotely control various operational characteristics of the transmitter Unless otherwise noted these inputs...

Page 189: ... polarity e g Falling edge RF On and current state e g HIGH LOW of the corresponding input pin Use the right arrow button to enter the Selection Polarity screen for the selected input to allow editing of the selection or the polarity Press cancel X to return to the previous menu If you save a change to a digital input via the front panel UI it will also be displayed on the remote AUI page NOTE The...

Page 190: ...Use the up and down buttons to select the desired digital output 1 through 16 from the list Each screen shows the current digital output parameter e g RF On Off as well as the polarity e g RF On Low and current state e g HIGH LOW of the corresponding output pin Use the right arrow button to enter the Selection Polarity screen for the selected output to allow editing of the selection or the polarit...

Page 191: ...analog output defaults prior to shipping There are no user configuration options They are for monitoring purposes only See the NX5 Pre installation Manual for details Analog Outputs Remote AUI Select the Analog Outputs tab to view the analog outputs see Figure 3 2 156 for the pre determined parameters There are columns that list the Full Scale Voltage and corresponding Full Scale Value as well as ...

Page 192: ...57 Analog Outputs Screens Use the up and down buttons to select the desired analog output 1 through 4 from the list Press cancel X to return to the previous menu Each screen shows Line 1 displays the analog output parameter e g 1 Forward Pwr 2 Refl Power B Sample or Total DC Current and its voltage relationship to the actual unit of measure i e square law sq or linear lin Line 2 displays the actua...

Page 193: ...e as many different schedules as you desire To view the Scheduler page select Scheduler from the Menu options Figure 3 2 158 Scheduler Page The left hand side of the Scheduler page displays a monthly calendar e g April 2015 Use the and buttons to navigate between months Use the and buttons to navigate to the beginning and the end of the schedule The right hand side of the Scheduler page contains a...

Page 194: ...es must be less than one year apart In the Days section select the days of the week on which the rule will apply In the Time of Day section set the start From and end To times hours minutes and seconds for the rule Use the Repeat field to establish a repeating cycle for the rule e g every 24 hours Use the drop down menu to select the preset e g Current Settings for the rule The preset s power mode...

Page 195: ...60 Enabling disabling the scheduler Remote AUI When Scheduler ON appears the transmitter will follow the Scheduler settings When Scheduler OFF appears the transmitter will stop following the schedule and the active preset will be the preset that was operating when the scheduler was disabled Enabling the Scheduler Front Panel UI To view the Scheduler enable disable screen see Figure 3 2 161 on the ...

Page 196: ...io Player page has two selectable tabs Playlist see page 3 2 177 Streams see page 3 2 179 Figure 3 2 162 Audio Player page Playlist tab shown The playlist or Shoutcast Livewire stream is typically used as an audio loss backup For example the user may operate with Preset 1 using one of the standard audio sources Preset 1 can be configured to switch to another preset e g Preset 2 which uses a playli...

Page 197: ... or mp3 files will be played For mp3 files using files with bit rates equal to or less than 96 kbps achieves best audio results Also you must have the optional USB sound card installed and activate a preset that has Audio Player AES1 or AES2 selected in the Analog Settings AM Source in the Presets page There are three sections in the Playlist tab Playlists Playlist Contents and Available Files on ...

Page 198: ...t Add Files button or refreshing the playlist Refresh button Audio files must be stored on an external USB device plugged into the USB A A4J3B or USB B A4J3C connector on the rear of the controller they are not stored in the transmitter Only the audio files stored in the root directory of the most recently connected USB device appear on the playlist The list will be empty if no USB device is conne...

Page 199: ... Streams The NX5 is capable of playing audio streams in either Shoutcast or Livewire format The audio player supports Shoutcast playlists and IP addresses for audio streams For a Shoutcast playlist enter the URL for the station For an audio stream enter the URL for that stream For Livewire enter the channel that contains the desired audio ...

Page 200: ...n page 3 2 179 click the Add button 2 Use the drop down menu to select the desired Type of audio stream Shoutcast or Livewire see Figure 3 2 165 3 Enter the appropriate information for the audio server Name and URL for Shoutcast Name and Channel for Livewire Make sure the NX5 can access the location 4 Click OK to add the audio stream or click Cancel to discard changes Livewire Type Shoutcast Type ...

Page 201: ...red audio stream from the list Click the Edit button to modify the audio stream or the Delete button to remove the audio stream 2 If you are editing an audio stream enter the appropriate information for the audio server Name and URL for Shoutcast Name and Channel for Livewire Make sure the NX5 can access the location 3 Click OK to either edit or delete the audio stream or click Cancel to discard c...

Page 202: ...when dual exciters are installed Figure 3 2 166 Changeover page Active Exciter indicates the exciter that is currently active also displayed in the top right corner of the remote AUI Main Exciter indicates in green which exciter is considered to be the primary exciter Select A or B The default exciter is A if the Standby Exciter is set to No NOTE Changing the setting may change the active exciter ...

Page 203: ...see Figure 3 2 167 Figure 3 2 167 Changeover Menu This menu has four sub menu options 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 2 168 on page 3 2 184 shows the editing screens for the Changeover menu Within any of the editing screens use the up and down buttons to edit a setting Press the ...

Page 204: ...iscard changes and return to the previous menu Selects whether or not a standby exciter is available This is factory set and only requires adjustment if an exciter is removed or not functional Yes indicates that standby operation is available or desired No indicates that a standby operation is not available or desired Press the cancel X button to discard changes and return to the previous menu Con...

Page 205: ...erforming On Air Checks see page 3 3 8 Replacing the Control Interface PWB Battery see page 3 3 9 Inspecting Lightning Protection Systems see page 3 3 11 Upgrading Software Periodically enhancements or improvements to the operating system are identified and made available Perform a software upgrade as follows Interval As required Parts and Tools Laptop i e local computer for direct connection or n...

Page 206: ...ected to the same network Transmitter IP Configuration 1 Go to the network settings page using the local front panel UI Main Menu User Settings Network Settings or the remote AUI Menu User Settings Network Setup 2 Record your current network settings IP Address Subnet Mask Default Gateway 3 If connecting to the transmitter directly with a laptop you must set a static IP address Set as follows Disa...

Page 207: ...el using a CAT5 Ethernet cable Open Internet Explorer and search for 10 10 10 2 The transmitter login screen should appear 2 If using a network computer open Internet Explorer and search for the IP address recorded in Step 2 of Transmitter IP Configuration on page 3 3 2 The transmitter login screen should appear 3 At the transmitter login screen enter User Nautel or where is the user assigned user...

Page 208: ...should highlight in blue and press Start Upgrade 3 After a successful load status is 100 complete and a message indicates a successful load cycle the ac power turn off then on on the NX5 4 This completes the software upgrade Restore the former network settings on the transmitter and laptop as required see Step 2 of Transmitter IP Configuration on page 3 3 2 5 Login and repeat Step 1 of Preliminary...

Page 209: ...Remove the air filter inspect it If the air filter is clean re install it If an air filter is dirty or damaged replace it as soon as possible See Replacing the Air Filter on page 3 3 6 2 Clean the NX5 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 N...

Page 210: ...142 or from the manufacturer 18 x 24 x 2 American Air Filter PerfectPleat HC M8 MERV 8 or equivalent or obtain one from any local supplier of HVAC supplies 2 Unpack the new filter and inspect it for damage 3 Remove the old or damaged filter by loosening the four 4 quarter turn fasteners securing the filter bracket to the rear door see Figure 3 3 1 on page 3 3 7 Remove the filter bracket and remove...

Page 211: ...NCE MANUAL ROUTINE MAINTENANCE VERSION 0 1 2015 08 01 PAGE 3 3 7 Figure 3 3 1 Replacing the Air Filter Bracket filter behind bracket 4 quarter turn fasteners to remove filter bracket NOTE Air flow direction is back to front ...

Page 212: ...ea Interval Every 12 months or as required by law Parts and tools High quality receiver compatible with the modulation scheme used on the transmitter Procedure 1 Monitor the transmitter signal to identify any problems Use a high quality receiver to monitor audio quality Check the spectral output of the transmitter using the remote AUI s spectrum analyzer Take a portable receiver to different locat...

Page 213: ...ned off while the backup battery power is low The battery should be replaced while ac power is applied to the transmitter Interval Every 12 months Parts and Tools Replacement battery 3 V lithium coin cell 20 mm Nautel Part BBLT01 Panasonic Panasonic CR2032 Procedure Perform the following steps to replace the battery 1 Ensure ac power is being applied to the transmitter 2 Open the front door to acc...

Page 214: ...1 R90 R100 R113 R114 R115 C45 C41 C40 R82 R83 R84 U20 R103 R102 R105 R104 C38 C39 CR14 CR15 R136 U27 R144 R143 R142 C79 CR16 TP10 C80 R127 R126 R133 R134 U24 R146 R141 C74 C73 R150 C69 U29 C70 C71 C78 TP48 R164 R183 R181 U33 CR19 CR21 CR25 CR29 C88 C87 R162 C93 C96 R175 R172 R186 U35 U39 R158 C89 CR18 L9 R170 R173 R179 R184 U32 U38 CR22 CR24 CR28 TP26 TP28 R199 R214 C110 C100 L14 R206 R207 R191 R1...

Page 215: ...ladder binoculars and continuity tester Procedure Perform the following steps to test the lightning protection systems 1 Test the continuity between ground available at your lightning arrestor and ground available on various pieces of equipment connected to the transmitter Ensure that there is no resistance 0 ohms 2 Physically inspect the lightning arrestor to ensure that all connections are tight...

Page 216: ...NX5 OPERATION MAINTENANCE MANUAL ROUTINE MAINTENANCE PAGE 3 3 12 VERSION 0 1 2015 08 01 ...

Page 217: ...tude Modulation DCC Dynamic Carrier Control DRM Digital Radio Mondiale A set of digital audio broadcasting technologies designed to work existing AM radio channels DSP Digital Signal Processing FPGA Field Programmable Gate Array HD Radio HD Radio is another term for In Band On Channel IBOC technology HD Radio is a trademark of iBiquity Digital Corporation IBOC Nautel In Band On Channel technology ...

Page 218: ... drive failure external interlock or spark gap Surge protection board An electrical panel that protects equipment from electrical surges in the ac power supply antenna or site ground caused by lightning strikes VSWR Voltage standing wave ratio This is an expression of the ratio of forward voltage to reverse voltage on the feedline and antenna system An ideal VSWR of 1 1 provides maximum transmitte...

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Page 220: ... 6NAUTEL 662 8835 Canada USA only or Phone 1 902 823 3900 or Fax 1 902 823 3183 Nautel Inc 201 Target Industrial Circle Bangor Maine USA 04401 Phone 1 207 947 8200 Fax 1 207 947 3693 Customer Service 24 hour support 1 877 628 8353 Canada USA only 1 902 823 5100 International Email support nautel com Web www nautel com Copyright 2015 NAUTEL All rights reserved ...

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