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NV15/NV20 Operations and Maintenance Manual

Operating the transmitter

Page 2-78

Issue 3.2 2013-10-01

FM polarity

This system setting (see

Figure 2.60

) allows users to invert the polarity of the frequency

modulation; (i.e. positive going modulation signal yields positive deviation; or positive going
modulation signal yields negative deviation). Options are

Normal

(default) or

Inverted

Figure 2.60: FM Polarity

Summary of Contents for NV15

Page 1: ...NV15 NV20 Transmitter Operations and Maintenance Manual Document NHB NV15 NV20 OPS 3 2 Issue 3 2 2013 10 01 Status Standard...

Page 2: ......

Page 3: ...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 provi...

Page 4: ......

Page 5: ...iv Toxic Hazards xiv Other Hazards xiv Safety Precautions xv Personal Safety xv Site Safety xvi Equipment Safety xviii Description 1 1 Ac dc power stage 1 2 Control monitor stage 1 3 RF drive stage 1...

Page 6: ...r settings 2 84 Remote I O page 2 104 Routine maintenance 3 1 Scheduled maintenance 3 1 Replacing an air filter 3 3 Performing on air checks 3 5 Replacing the control interface PWB battery 3 6 Replaci...

Page 7: ...l record Issue Date Reason 3 0 2011 11 10 Release 3 of product NARF50B 3 1 2012 12 15 Section 2 updated to support software release 4 0 Section 3 expanded air filter descriptions to include M7 MERV 7...

Page 8: ...NV15 NV20 Operations and Maintenance Manual Page viii Issue 3 2 2013 10 01...

Page 9: ...ructed during a troubleshooting task see Section 5 Test and adjustment on page 5 1 Performing procedures When using procedures in this manual perform each step in sequence If you are asked to see anot...

Page 10: ...e includes the following documents NV15 NV20 Pre installation Manual NV15 NV20 PREINST Provides instructions and reference information needed when planning and preparing for the installation of an NV1...

Page 11: ...and information about field upgrades Documentation online and printed The website s NUG section provides online access to all the documentation for your NV15 NV20 Documentation is provided in Acrobat...

Page 12: ...NV15 NV20 Operations and Maintenance Manual Page xii Issue 3 2 2013 10 01...

Page 13: ...live and serious danger is present DANGER HIGH VOLTAGE Indicates dangerous voltage in excess of 72 volts capable of causing a fatal electrical shock are present on or near parts bearing this label Mou...

Page 14: ...n hazardous during normal device operation and under normal device failure conditions These devices are specifically identified with BeO in the Description column of the Troubleshooting Manual s parts...

Page 15: ...umber of training courses covering the basic fundamentals of RF systems and transmitters and the operation and maintenance of the transmitter For more information about available courses and schedules...

Page 16: ...id Nautel does not offer first aid training since the hazards associated with high voltage and RF energy are not specific to the transmitter However the customer should provide first aid training to a...

Page 17: ...icularly near the feedline antenna and tower At some sites these fields may cause biological effects including the heating of body tissues Intense fields can also create dangerous high voltages on ung...

Page 18: ...tector in the transmitter s ac power feed to prevent over voltage from entering the transmitter Lightning Protection The transmitter is designed to resist lightning strike damage However intense or re...

Page 19: ...steps to prevent the transmitter from shifting or rocking during an earthquake Even during minor earthquakes rocking or movement of the transmitter is likely to damage the feedline connection and coul...

Page 20: ...NV15 NV20 Operations and Maintenance Manual Page xx Version 3 2 2013 10 01...

Page 21: ...y is subdivided into four basic stages Ac dc power stage Control monitor stage see page 1 3 RF drive stage see page 1 4 RF power stage see page 1 6 NV15 NV20 electrical schematics Some descriptions in...

Page 22: ...U4 fan power supply modules A U7 and B U8 IPA power supply modules A U9 B U10 and dual PA power supply modules U12 through U15 for each of the two RF power modules There is also a PS interface PWB as...

Page 23: ...and U2 and the control monitor stage 12 V is applied via power rectifiers CR3 and CR4 to the control monitor stage A nominal 12 V is applied as 12V Sample A and B to the control monitor stage for mete...

Page 24: ...age 1 10 Exciters A A3 and B A4 are the RF drive sources for the transmitter They accept the external audio program and or IBOC information see the NV15 NV20 Installation Manual for details on various...

Page 25: ...l 0 V and relay A5A1K1 will be energized Exciter B s output will be applied to 3 dB hybrid coupler A5A1U1 Exciter drive splitter The splitter changeover PWB s 3 dB hybrid coupler A5A1U1 is connected a...

Page 26: ...fier The IPA output is sampled then split to drive the module s eight PAs The IPA Volts and PA Volts inputs from the associated switching power supply modules control the RF output of the IPA and eigh...

Page 27: ...for use with a modulation monitor or spectrum analyzer RF sample PWBs A4 and A5 provide similar samples at A4J1 and A5J1 These samples are applied to exciters A and B if used for use by the exciters a...

Page 28: ...NV15 NV20 Operations and Maintenance Manual Description Page 1 8 Issue 3 2 2013 10 01...

Page 29: ...IPA PWR SUPPLY FAN PWR SUPPLY SBC AUI PWR SUPPLY LV PWR SUPPLY PWR SUPPLY MODULE C PWR SUPPLY MODULE A SYSTEM CONTROL 10KW POWER BLOCK PWR SUPPLY PWR SUPPLY PWR 10KW POWER BLOCK SBC PWR REJ PWR LOW PA...

Page 30: ...NTERFACE CONSOLE COMPOSITE SCA MPX L R SCA GENERATOR 2 x AES EBU TOSLINK OPTICAL EXTERNAL 10MHz REFERENCE FPGA TCXO OR OCXO EXCITER PWB RF DAC PLL VCSO FILTER PREAMP BIAS DAC BIAS POWER VSWR PROTECTIO...

Page 31: ...Issue 3 2 2013 10 01 Page 1 11 Figure 1 4 RF Power Module Block Diagram FWD FWD 6 4 1 4 WAY PWR PWR 7 8 5 2 3 4 WAY SPLITTER 4 WAY COMBINER FWD PWR OUTPUT B2060005 VB IPA 4 WAY SPLITTER COMBINER PWR S...

Page 32: ......

Page 33: ...2 14 Menu page describing transmitter operations see page 2 15 Logs page viewing transmitter log see page 2 16 Viewing tool menu panels see page 2 25 Viewing real time meters see page 2 40 Presets edi...

Page 34: ...7 inch colour LCD screen mounted on the front of the control cabinet Figure 2 1 The AUI is controlled via touch screen that you can also access using a PC and a web browser This section includes the f...

Page 35: ...page 2 61 System settings see System Settings on page 2 70 User accounts see User accounts on page 2 79 Changeover see Changeover page on page 2 83 User settings see User settings on page 2 84 Remote...

Page 36: ...in window In the Language field press the down arrow to review a drop down menu displaying the available language options and select one In the User field enter the username Default is Nautel In the P...

Page 37: ...he down arrow to review a drop down menu displaying the available language options and select one In the User field enter the username Default is Nautel In the Password field enter the password Defaul...

Page 38: ...NV15 NV20 Operations and Maintenance Manual Operating the transmitter Page 2 6 Issue 3 2 2013 10 01...

Page 39: ...smitter Status page 2 59 Logs page 2 16 Exciter TCXO page 2 73 Audio Input Calibration page 2 75 Turn On Delay page 2 76 Defaults page 2 76 External 10MHz page 2 97 FM Polarity page 2 78 Thresholds pa...

Page 40: ......

Page 41: ...AUI pages on the front panel of the transmitter regardless of the login status however only users with the appropriate permission level can access functions that alter the transmitter control settings...

Page 42: ...ist View Choose meters for display page 2 40 Presets Edit user defined presets page 2 44 Transmitter Status View transmitter s current active faults and operational status page 2 59 Factory Settings V...

Page 43: ...l settings on page 2 44 Press Menu Presets bottom panel to open the Presets page and edit this information Also the call Sign ID is displayed here see Setting call sign ID on page 2 103 Preset Display...

Page 44: ...he Status button is red one or more alarms of high severity is currently being reported and the transmitter is in an off air state When the Status button is amber medium or yellow low one or more lowe...

Page 45: ...ner of one panel to close an existing panel and then press in the blank space to display a menu of panels see Viewing tool menu panels on page 2 25 Meters Displays the real time meters that provide a...

Page 46: ...me page The Home page is the first screen to appear when you login into the AUI You can return to the Home page from any screen by pressing on the logo upper left corner or by pressing Menu Home Figur...

Page 47: ...re 2 7 Menu Page Select Home to return to the home page see Figure 2 6 on page 2 14 Choose Presets to open screens related to presets see Editing or creating presets on page 2 45 Select Factory Settin...

Page 48: ...date and time enabling and configuration of NTP servers and setting call sign see User settings on page 2 84 Press Remote I O to access a page that allows assignation of remote digital inputs and out...

Page 49: ...tifies the alarm name State indicates whether the alarm state is active red bell or cleared green checkmark and in some cases indicates whether the RF was turned on or off This column will also displa...

Page 50: ...rmation can span over more than one page The current page number is identified above the table on the right side of the screen For example Page 1 4 means that the displayed page is one out of a possib...

Page 51: ...ess to determine filter parameters by date and frequency Copy Logs Press to copy the selected logs remote view only Delete Press to remove all selected logged events Statistics Press to display detail...

Page 52: ...vice Controller displays controller events only Exciter A displays exciter A events only Exciter B displays exciter B events only RF Module displays applicable RF Module events only Activate a log mod...

Page 53: ...Word Excel Notepad etc Press OK or Cancel to close and return to the Transmitter Log Figure 2 11 Log Manager Copying Logs Deleting logs You can delete all events or a selection of events by clicking...

Page 54: ...event type Use the scroll bar to move through the list or the up and down arrow buttons to the right of the scroll bar if applicable If the event log display spans more than ten rows use the arrows on...

Page 55: ...ence i e Events column is 1 then the time in the Earliest column will be the same as the time in the Latest column If an alarm has more than one occurrence e g Events column is 4 then the Earliest col...

Page 56: ...gend The Legend tab is different from the other tabs Press the Legend tab to display a window describing the meaning of the symbols that appear in the State and Severity columns of the Logs page see F...

Page 57: ...ormation panels see Figure 2 15 This section include the following topics Describing instrument panel options on page 2 26 Viewing instrument panels on page 2 27 Instrument panel procedures on page 2...

Page 58: ...3 EQ Filter Delay Displays the delay of the modulator s EQ filter across its bandwidth See page 2 34 AM AM Correction Displays the amplitude compensation being applied to the magnitude signal See page...

Page 59: ...sor in the panel touch the screen where you want the cursor see Figure 2 17 on page 2 28 The cursor position is noted in the upper right hand corner of the panel e g frequency and amplitude for the sp...

Page 60: ...more information when maximized e g Signal Constellation see Figure 2 19 on page 2 29 To display additional settings in the Spectrum Analyzer panel touch the cog button see Figure 2 16 on page 2 27 D...

Page 61: ...Maintenance Manual Operating the transmitter Issue 3 2 2013 10 01 Page 2 29 Figure 2 18 Instrument Panel Expansion Example 1 Figure 2 19 Instrument Panel Expansion Example 2 Maximize Minimize buttons...

Page 62: ...7 Part 73 317 and IC BETS 6e Touch on the panel to display a cursor in the approximate area The cursor position frequency and amplitude is noted in the upper right hand corner of the panel Touch other...

Page 63: ...the analyzer with the carrier frequency always at the center Allowable range is 10 1200 kHz Default setting is 1000 kHz Averages determines the number of averages that the analyzer performs per sweep...

Page 64: ...uency response See Figure 2 22 This panel displays the frequency response of the active exciter s EQ filter The panel displays the gain of the filter with respect to the magnitude and frequency of the...

Page 65: ...me domain This is a static display tool so the screen image is not fluid and will not change Touch on the panel to display a cursor in the approximate area The cursor position magnitude and time is no...

Page 66: ...modulator s EQ filter across its bandwidth Touch on the panel to display a cursor in the approximate area The cursor position delay and frequency is noted in the upper right hand corner of the panel T...

Page 67: ...transmitter output power RF drive A LUT index value of 255 represents the maximum transmitter output power RF drive The LUT curve can show that at low transmitter output power more RF drive power is...

Page 68: ...ection Inversely a negative phase correction will be displayed in the plot given high output power levels This correction is represented on the plot via the x axis table index value of between 0 255 T...

Page 69: ...he display is representative of the forward path that will be transmitted Sub carrier group information is shown in the lower right section of the screen Displayed information includes the sub carrier...

Page 70: ...nless the transmitter is operating in stereo mode or not operating in IBOC Left and right audio content is displayed for all other audio sources The plot consists of a group of sequential samples to a...

Page 71: ...senting the average power The average power is 0db The y axis displays the probability of exceeding that power level This plot can be used to assess the distribution of a given signal and provides an...

Page 72: ...n page 2 41 Identifying meter information on a specific sub device on page 2 42 Saving a meter list on page 2 43 Figure 2 30 Meters Page Describing the meter display The meters displayed in the AUI re...

Page 73: ...section of the AUI screen To delete a meter from the Home page press X in the Meters window Figure 2 31 To review all the meter options press the meter list view shortcut button magnifying glass at th...

Page 74: ...tion window in tabular format see Figure 2 32 3 To choose individual meters for display in the Meters window of the Home page Select the device type name in the Transmitter Layout panel and select the...

Page 75: ...meter list as the default for the current user account The symbol shows the default Press Save to overwrite the selected meter list with the currently displayed meters Press Load to display the meter...

Page 76: ...existing presets To view the Presets page select Presets in the Menu page This section includes the following topics Editing or creating presets on page 2 45 Loading presets on page 2 46 Understanding...

Page 77: ...ve changed since the last preset was loaded Current Settings are not saved through an ac power cycle when the transmitter recovers from an ac power loss it loads the preset that was last activated On...

Page 78: ...ent active operational preset or any preset that is referenced in the Remote I O menu as either a remote input or output Those links in the Remote I O menu must be deleted before the associated preset...

Page 79: ...de Set the overall transmission mode Available options are FM an analogue only mode transmits a carrier frequency modulated with audio HD all digital mode this mode transmits the upper and lower digit...

Page 80: ...log carrier HD PA Volts for FM HD HD and DRM modes enter value in volts between 25 0 V and 53 0 V This value sets the drain voltage applied to the PAs in the RF power modules from their associated pow...

Page 81: ...ersely smaller values result in improved efficiency but degrade the spectrum The default value is 50 V and typically does not change HD Power Boost for FM HD mode only Enable this setting to engage Na...

Page 82: ...configuration via the MPX Level setting See page 2 51 for additional configuration information Primary Digital this source allows for further configuration via Digital Level Audio Mode Mono L R Mono...

Page 83: ...tereo applies to Left Right Mono Primary Digital or Secondary Digital sources selecting Stereo applies a 19 kHz pilot 15kHz Lowpass Filter applies to Left Right Mono Primary Digital and Secondary Digi...

Page 84: ...nd 20 used to reduce the modulation level of the main audio when SCAs are enabled typically for every 2 of SCA modulation the main audio modulation must be reduced by 1 Internal SCA1 2 Enable or disab...

Page 85: ...us SCA1 or SCA2 Mode select FM frequency modulated sub carrier typical or DSB SC double side band suppressed carrier Figure 2 38 Presets RDS RDS see Figure 2 38 RDS When Enabled all the selections li...

Page 86: ...ces only PS Code programme service code this is simply an eight character static display that represents the call letters or station identity name Most RDS capable receivers display this information a...

Page 87: ...ata sources only Alternate Frequencies select None or 1 through 6 This allows a receiver to re tune to a different frequency providing the same station information when the first signal becomes too we...

Page 88: ...Sync select Enabled Pilot Sync Phase if Pilot 1 PPS Sync is enabled enter value between 0 and 360 degrees typically 0 degrees Sample Output determines which sample signal will be present on exciter s...

Page 89: ...ake on the loss of a modulating signal post the timeout period Select None no resulting action Inhibit inhibits the RF output and fans until the audio returns or Change Preset changes the active prese...

Page 90: ...defaulted to 120 Gain allowable range is 0 100 defaulted to 56 2 L R Limiter this look ahead limiter can be applied to the signal immediately before the stereo generator in the exciter It has a fixed...

Page 91: ...e Transmitter Status page see Figure 2 40 This page shows current active alarms and status to aid in fault diagnosis To view the Transmitter Status page select Status from the AUI bottom banner This s...

Page 92: ...en the Status button is amber one or more active alarms are indicating that the transmit ter is still on air but may be at reduced power When the Status button is green no alarms are being reported an...

Page 93: ...ion on the right side of the page This section includes the following topics System configuration on page 2 62 Transmitter type on page 2 63 Scaling on page 2 64 Thresholds on page 2 65 Redundant supp...

Page 94: ...er operates as part of a main standby or 1 backup for N other transmitters and is under the control of the SC1 system controller ALC Limit Allowable range is 0 135 with a typical value of 100 ALC limi...

Page 95: ...ransmitter type NV5 NV10 NV20 etc This setting is one time factory configured and cannot be changed Figure 2 44 Factory Settings Transmitter Type WARNING Device settings are established at the factory...

Page 96: ...and should not require any adjustment These settings affect critical system protection circuits Making changes to these settings may void your warranty Contact Nautel before making changes Note FM and...

Page 97: ...d touch the applicable field to enable editing The current threshold is displayed Enter the new threshold and press Apply to save changes Figure 2 46 Factory Settings Thresholds Transmitter Default Va...

Page 98: ...V power supplies Select Yes default if the supply operates as a redundant set Select No if the supply is standalone Figure 2 48 Factory Settings Redundant Supplies WARNING Device settings are establis...

Page 99: ...r Balancing targets a reject power percentage of 0 75 or less of the transmitter s maximum power capability An IPA Balancing Recommended alarm will be generated if this percentage exceeds 1 5 While th...

Page 100: ...eject power that can sometimes not be compensated for with this function Note The Reject Power Percentage meter is only available in this functional menu The green amber red colours are simply to prov...

Page 101: ...s 1 through 5 from the factory supplied control tag The Bias Values fields accept only a decimal number format Enter the decimal number from the control tag or if your spare PA control tag specifies a...

Page 102: ...s via the System Settings page see Figure 2 51 which you access from the Menu page This section includes the following topics Reset on page 2 71 Upgrade software on page 2 72 Exciter TCXO on page 2 73...

Page 103: ...ht side of the page 2 Reset the items by pressing the appropriate key To reset the AUI advanced user interface press Reboot AUI To reset the active exciter press Reboot Active Exciter To reset the sta...

Page 104: ...displays the available upgrade files uploaded to the transmitter Details opens a window containing information about the installed software If an upgrade file is selected the screen will show a compa...

Page 105: ...ansmitter carrier frequency is being measured with a calibrated external frequency counter operators can manually offset the internal TCXO by entering the appropriate ppm difference in the TCXO Offset...

Page 106: ...Gain Applicable for FM HD mode only at 20dBc to 15 1dBc injection levels and represents the starting default gain applied to the forward path signal within the exciter at initial turn on ramp up FM H...

Page 107: ...nt SCA2 Peak will be displayed when the associated audio input source is connected Enter the calibration value and press Apply to save changes Changes apply to the active exciter A or B only To calibr...

Page 108: ...It also stores the default Exciter power level based on transmitter type and default IPA output power referenced to 98MHz via the Power tab see Figure 2 59 on page 2 77 These settings are fixed and sh...

Page 109: ...ias IPA and PA default index values shown Figure 2 59 Defaults Power Note Default Exciter Power is transmitter specific NV3 5 NV5 11W NV7 5 NV10 25W NV15 NV20 65W and NV30 NV40 130W Default IPA Power...

Page 110: ...FM polarity This system setting see Figure 2 60 allows users to invert the polarity of the frequency modulation i e positive going modulation signal yields positive deviation or positive going modula...

Page 111: ...res of the AUI using the User Accounts page see Figure 2 61 To view the User Accounts page select User Accounts from the Menu options This section includes the following topics Setting user permission...

Page 112: ...inistrator to use this function Procedure to add a user see Figure 2 62 on page 2 82 1 Open the User Accounts page 2 Press Add bottom of the screen to open a small Add User window 3 Beside Username en...

Page 113: ...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 p...

Page 114: ...inistrating user accounts 5 Press Apply to assign the new permissions to the selected user Removing an account To remove a user account select the desired user from the Users list and press the Delete...

Page 115: ...esired Auto setting cannot be changed if the selected Standby Exciter button is No For Standby Exciter select Yes if standby operation is available or desired or No if standby operation is not availab...

Page 116: ...ction includes the following topics Setting up the network on page 2 85 Email configuration on page 2 88 Notifications on page 2 90 Configuring exgine settings on page 2 91 Nautel Phone Home on page 2...

Page 117: ...e 3 2 2013 10 01 Page 2 85 Figure 2 64 User Settings Page Setting up the network The Network Setup page see Figure 2 65 allows you configure parameters for connecting the AUI to your network Modify ne...

Page 118: ...anually Static IP or automatically by the access point i e a router through DHCP In either case the access point must be configured with the correct settings which match the settings on the AUI in ord...

Page 119: ...outer documentation for additional remapping information and instructions Status Identifies the status of the network Running transmitter is connected to a network and is functioning properly Not Runn...

Page 120: ...Settings in the Home page 2 Select the Email Configuration option left side of the screen to display related information and associated parameters on the right side of the screen 3 Enter the followin...

Page 121: ...Required If your email server requires authentication to send emails select the check box and enter the appropriate Username and Password to authenticate If the check box is not selected the Username...

Page 122: ...e 2 Select the Notifications option left side of the screen to display a list of pre existing notifications on the right side of the screen 3 Choose from the following options Press Add to add create...

Page 123: ...ion see Figure 2 68 on page 2 92 Procedure to configure Exgine Settings 1 Open the User Settings page by pressing Menu User Settings in the Home page 2 Select the Exgine Settings option left side of t...

Page 124: ...ead Mac Address Displays a number that serves as unique network adapter identifier This is set by the manufacturer and is displayed for informational purposes only It may be necessary to use this numb...

Page 125: ...ur transmitters security All data transfers are one way Nautel transmitters are intelligent collecting data on nearly every aspect affecting your transmitters performance When this data is used by Nau...

Page 126: ...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 SNM...

Page 127: ...s 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 Enable Traps check box must be selected to support this function The...

Page 128: ...the User Settings page From this page you can press Capture Meters reads all meter values Capture Alarms reads all active alarms Capture Presets reads the current active preset and Capture Settings r...

Page 129: ...be selected as this ensures that an alarm will be activated on the Status page should the external signal be lost If an external 10MHz source is not being used the default No setting should not be ch...

Page 130: ...see Figure 2 74 allows selection of the input AES EBU 1 AES EBU 2 or Optical that is mapped to the primary and secondary digital inputs via the presets Audio Source setting Figure 2 74 User Settings D...

Page 131: ...s can select the appropriate FM mask standard FCC ETSI or None being used by the analyzer The selection affects the mask lines on the Spectrum Analyzer instrument Use the Mask Type pull down menu to s...

Page 132: ...as well as regional and timezone settings for a transmitter location Procedure to set up the time and date 1 Select the Time Setup option from the left side of the User Settings page to open a related...

Page 133: ...ging servers Figure 2 77 User Settings NTP Servers Enabling NTP Enable the NTP function by selecting the Enable NTP checkbox Disable by de selecting the Enable NTP checkbox Press the Apply button to a...

Page 134: ...es Managing NTP Servers The Manage Servers section displays the NTP server files that have been added You can Add to the list of NTP servers or Delete a selected NTP server from the list Audio low thr...

Page 135: ...allows users to set a name that identifies the transmitter on the AUI This identification will be displayed in brackets on the top transmitter banner of the AUI see Figure 2 80 Enter the call sign or...

Page 136: ...Installation Manual for information on remote inputs and outputs and their factory default settings This section includes the following topics Digital inputs on page 2 105 Digital outputs on page 2 1...

Page 137: ...effect on transmitter operation regardless of logic level RF On Off Same as pressing the RF On telling the system to provide RF power if possible or the RF Off button on the local AUI There are 2 inpu...

Page 138: ...r causes a reset or selects B as appropriate Falling Edge Turn Off Set To A Logic 0 low or trailing edge de activates the input or selects A as appropriate Rising Edge Turn Off Set To A Logic 1 high o...

Page 139: ...On Logic 1 high causes applicable preset to become active Active Low Turn On Logic 0 high causes applicable preset to become active Active High Decrease Logic 1 high causes a power decrease Active Low...

Page 140: ...p down menu options Some digital output default examples if the selected channel is RF On Off the drop down options are Output Low When RF On Logic 0 low indicates the output is true RF is on Logic 1...

Page 141: ...dicates the output is false Inactive Output Low When Inactive Logic 0 low indicates the output is true Inactive Logic 1 high indicates the output is false Active if the selected channel is Modulation...

Page 142: ...allowable range is 1 6 V defaulted to 6 V will be reflected in the other fields according to the following equation Current Value Full Scale Value x Full Scale Voltage Current Voltage Press Apply to...

Page 143: ...15 NV20 at scheduled intervals The recommended minimum time between scheduled maintenance visits is three months Local operating and environmental conditions may dictate more frequent visits while in...

Page 144: ...tempt to scrub off dirt or oil If necessary dampen the cloth with distilled water When complete reconnect the DC INPUT plug to the monitor and re install the cover Checking hardware All hardware must...

Page 145: ...er of HVAC supplies 2 Unpack the new filter and inspect it for damage 3 Remove the old or damaged filter see Figure 3 1 on page 3 4 as follows For a front door air filter open the front door and remov...

Page 146: ...ce Manual Routine maintenance Page 3 4 Issue 3 2 2013 10 01 Figure 3 1 Replacing Air Filters FRONT VIEW REAR VIEW FRONT DOOR FILTER UPPER PANEL FILTERS 2 LOWER PANEL FILTER Quarter turn fasteners 3 pe...

Page 147: ...audio quality Check the spectral output of the transmitter using the front panel AUI s spectrum analyzer Take a portable receiver to different locations in your coverage areas to identify any problem...

Page 148: ...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 CR2032 Procedure Perform the following steps t...

Page 149: ...and tools Replacement battery 3 V lithium coin cell 20 mm Nautel Part BBLT01 Panasonic CR2032 Procedure Perform the following steps to replace the battery 1 Ensure ac power is being applied to the tr...

Page 150: ...ars 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...

Page 151: ...l computer for direct connection or network computer with Windows and Internet Explorer Web browser CAT5 Ethernet cable Upgrade software tgz or img file provided via email web download or flash card P...

Page 152: ...the current compact flash card bottom edge of SBC Note the orientation of the card 4 Install the new card noting orientation and plug in SBC power connector P8 5 The AUI should boot up and the transmi...

Page 153: ...Local Area Connection Status window select Close 8 Close the Network Connections window Transfer software upgrade file to transmitter 1 If using a laptop connect the laptop network interface card to t...

Page 154: ...e image then paste the image into a compatible application Paint Word etc The spectrum plot should indicate at least 3 dB of margin between the IBOC intermodulation products and the blue mask limit li...

Page 155: ...Maintenance Manual Non standard maintenance Issue 3 2 2013 10 01 Page 4 5 Figure 4 1 Spectrum Analyzer plot on AUI Figure 4 2 Presets Page Adjusting HD PA Volts setting margin between mask and spectr...

Page 156: ...e size of the new RF output connector and order the appropriate kit from Nautel see Parts and tools for options 2 Unpack the new connector kit and inspect the parts for damage 3 Turn off the transmitt...

Page 157: ...hex bolt 7 Install the new output connector cup using an M10 hex bolt 8 Assemble the new spacer plates and output plate together using hardware retained in Step 5 Install the plates on top of the tran...

Page 158: ...NV20 Operations and Maintenance Manual Non standard maintenance Page 4 8 Issue 3 2 2013 10 01 Figure 4 3 RF Output Connector Assembly Detail 4 1 16 inch EIA OUTPUT CONNECTOR CUP OUTPUT PLATE SPACER PL...

Page 159: ...Operations and Maintenance Manual Non standard maintenance Issue 3 2 2013 10 01 Page 4 9 Figure 4 4 RF Output Connector Assembly Detail 3 1 8 inch EIA OUTPUT CONNECTOR CUP OUTPUT PLATE SPACER PLATES 2...

Page 160: ...isable or lock out its ac power source 3 Open the rear door of the transmitter 4 Locate the ac power distribution assembly A6 see Figure 4 5 on page 4 11 Disconnect ac power cables A100W1P2 and A100W2...

Page 161: ...NV15 NV20 Operations and Maintenance Manual Non standard maintenance Issue 3 2 2013 10 01 Page 4 11 Figure 4 5 Ac Distribution Assembly Location AC DISTRIBUTION ASSEMBLY REAR VIEW A6...

Page 162: ...NV15 NV20 Operations and Maintenance Manual Non standard maintenance Page 4 12 Issue 3 2 2013 10 01...

Page 163: ...Protocol DSP Digital Signal Processing EEPROM Electrically Erasable Programmable Read Only Memory Foldback A reduction in RF output power caused by transmitter not acheiving the desired set point pow...

Page 164: ...omplete and permanent loss of RF output power Typically follows repeated cutback foldback or shutback events Surge protection panel An electrical panel that protects equipment from electrical surges i...

Page 165: ......

Page 166: ...Free 1 877 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 Custom...

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