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Installation & Operation 

User Guide 

541 

FM Modulation Monitor 

June, 2023 

Firmware Rev. 1.0.0.0 (Release) 

 

Inovonics, Inc. 5805 Highway 9 

Felton, CA 95018 

Tel: (831) 458-0552 

Register online at 

www.inovonicsbroadcast.com 

PRODUCT REGISTRATION RECORD 

541 –  Serial No. ____________________ 
Purchase Date _____________________ 
Warranty Registered via Web? 

Reg. Date __________ By: ____________ 

Содержание Inovonics 541

Страница 1: ...541 FM Modulation Monitor Installation User Guide www inovonicsbroadcast com...

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Страница 3: ...0 0 0 Release Inovonics Inc 5805 Highway 9 Felton CA 95018 Tel 831 458 0552 Register online at www inovonicsbroadcast com PRODUCT REGISTRATION RECORD 541 Serial No ____________________ Purchase Date _...

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Страница 5: ...UTS OUTPUTS AND PORTS Antenna Input and Considerations 9 High Level Input 9 Multiplex or Pilot Sync Output 9 Analog Line Output 9 AES Digital Line Outputs 10 AoIP Streaming Port and Levels 10 LAN Netw...

Страница 6: ...Tuning and Measurements 19 SCA Settings 19 Station Presets 20 Important 20 StationRotation 20 METERS FM Carrier Modulation 21 Pilot 38kHz and RDS Levels 22 Multiplex Power 22 Demodulated FM Audio 23...

Страница 7: ...Received 37 SCA Loss 38 Alarm Logging 38 SETUP Radio Settings 39 MPX Output 39 Program Line Outputs 39 Dante AoIP Streams 39 Other Streaming Options 40 HTTP Icecast Setup 40 UDP Streaming 40 Save the...

Страница 8: ...SMTP Setup 45 Recipients Send To 45 Notifications Send What 46 TIME SETUP Time and DST 46 Presentation Formats 46 RTC Battery 46 Time Server 47 ADMINISTRATIVE MATTERS Security and Passwords 47 Signin...

Страница 9: ...etup and operation with the built in Webserver that may be addressed over any IP network by computer or mobile device The 541 supports full SNMP remote control and monitoring Graphic front panel and r...

Страница 10: ...m 15dBu to 15dBu in 0 1dB steps 200 resistive source Program Audio Outputs continued AES Digital XLR Adjustable from 30dBFS to 0dBFS in 0 1dB steps user selected 44 1kHz or 48kHz sample rate 110 trans...

Страница 11: ...DIAGRAM The 541 incorporates Software Defined Radio SDR receiver architecture combined with similar monolithic elements in its design such that the product is almost entirely DSP based Virtually all...

Страница 12: ...ecific service instructions or soft ware firmware updates when issued Register online at www inovonicsbroadcast com support productRegistration NOTE Many users choose first to familiarize themselves w...

Страница 13: ...UTS OUTPUTS AND PORTS Antenna Input and Considerations The rear panel ANTENNA connector is a female 75 ohm F con nector While the F is a common connector in the US adapters to other connector types ar...

Страница 14: ...nte compliant AoIP Audio over Internet Protocol out puts appear at the rear panel RJ45 AoIP PORT This port is in dependent of the LAN PORT network connection and its casual streaming utility Dante AoI...

Страница 15: ...arious dis cussions that follow You will at least need to access the LCD touchscreen to find the unit s IP address so some familiarity with the front panel is useful Powering Up Boot startup time of 5...

Страница 16: ...displays the unit s current firmware version and serial number and shows how long the 541 has been running since AC mains pow er was last applied Housekeeping features that show up here along with a...

Страница 17: ...adjusted This screen will pop up automatically when head phones are plugged in The program line outputs and their levels may be selected and set here as well as under the LCD and Webpage Setup menus T...

Страница 18: ...king Enter Alternatively a Windows computer is able to locate and connect to the 541 by using the unit s Hostname followed by a forward slash in place of the IP address The Hostname is shown on the 54...

Страница 19: ...er contains multiple inter active pages or menus for setup and operation of your unit These pages provide ready and interactive access to all settings readouts graphics audio monitoring and alarms Now...

Страница 20: ...ze Responsive Webpages The responsive 541 internal webserver provides an optimal viewing experience across a wide range of devices desktop computers tablets and mobile phones Specific to the device th...

Страница 21: ...suggest other suffixes to be tried to hack other functions NOW PLAYING The Now Playing Webpage was shown complete on Page 15 This page and some others require you to scroll down to see everything depe...

Страница 22: ...ple above illus trates a station that has lost audio and has not received an RDS RadioText update in timely fashion Tuning the 541 This snapshot shows the Tuner subsection of the Now Playing Webpage W...

Страница 23: ...e highlighted in yellow SCA Subcarrier Tuning and Measurement Audio SCA narrowcasts are received and their parameters measured by a utility built into the 541 An SCA subcarrier rides above the L R S D...

Страница 24: ...to the Now Playing Webpage and click the Save Changes bar to permanently associ ate your option updates with that station preset StationRotation A mod monitor is historically employed as the station...

Страница 25: ...le sub screens to accommodate this plethora of readouts FM Carrier Modulation These three bargraphs and their associated numerical readouts on the right give quasi peak response measurement of FM car...

Страница 26: ...tions will show up on the accompany ing AM bargraph as amplitude modulation of the stereo pilot Early FM stereo exciters generated the FM baseband signal us ing analog multipliers which required calib...

Страница 27: ...lays the demodulated FM program au dio Left and Right channel levels have quasi peak response and a rapid fallback to give a good visualization of instantaneous vs average program energy Bear in mind...

Страница 28: ...io sources market companions music cuts processing presets talent voices etc Zero LU does not conveniently correlate to a specific modula tion percentage because of the Standard s specified frequency...

Страница 29: ...ation kHz slider Page 19 With the slider at its default of 5 0 5kHz SCA deviation by a steady state tone would drive dB to 0 Synchronous and AM Noise Sync synchronous FM noise refers to amplitude modu...

Страница 30: ...play The IF Spectrum The Webpage screenshot shown below is the receiver s IF spec trum 0kHz represents the carrier frequency of the currently tuned station obviously an HD Radio station in this case C...

Страница 31: ...tude value shown as you slide your cursor across the screen Click the magnifying glass for a full screen display Mousing will highlight a specific re gion of the FM base band spectrum the L R compone...

Страница 32: ...ng with front panel operation History Screen Basics The Modulation screen shown below is typical of the 541 histo ry display plots the buttons at the top select the various signal parameters Note the...

Страница 33: ...eak value of carrier devia tion in yellow Mod and a held peak Mod Peak value in green The Mod Peak reading is also the value used for the overmodulation alarm RF Metrics Reception metrics re ally ough...

Страница 34: ...vertical scal ing will change to accommodate the level range for that partic ular timeframe MPX Power Similar in function to the Loudness History utility just described MPX Power instead reflects the...

Страница 35: ...lograms and the Pause bar at the bottom of the screen lets you freeze the wave form The little magnifying glass in the upper right corner will switch you to a full screen display Audio XY Display The...

Страница 36: ...to that station which you may not want to do Shown above is an entire FM band plot of the busy Los Angeles FM market Two Scan Type modes may be selected at the bot tom of the screen RSSI is the quick...

Страница 37: ...nsive display of the RDS information that now accompanies the majority of analog FM transmissions Note the red dots in the illustration on the previous page The upper area of the screen shows the more...

Страница 38: ...o the Now Playing Webpage and Save Changes under the Tuner heading so that those alarm updates will then pertain only to that station This Save Changes procedure must be completed immediately after pr...

Страница 39: ...n Sec slider The alarm will reset clear when Mod Peak drops to and re mains at or below the Threshold Off setting for the number of Time Off Sec seconds In the example shown Mod Peak must reach 105 an...

Страница 40: ...ared FM audio naturally fries bacon when the carrier disappears We recommend setting Mute to On for not only will it obviate an unending blast of noise but also will ensure that the FM Audio Loss alar...

Страница 41: ...against transmitting a false hour figure and really confusing your listeners If the tuned station is not sending RDS time then RDS Time In valid will show below Unit Time The Threshold On Min lets you...

Страница 42: ...The log holds data on the type of Alarm which monitored Station it pertains to important when the StationRota tion feature is active the Time and Date re ceived plus the alarm Duration You may View Al...

Страница 43: ...nebulous with regard to this integration we recommend the default value of 120 seconds MPX Output The rear panel MPX OUT BNC connector can deliver either the FM baseband MPX signal or the 19kHz stere...

Страница 44: ...in turn helping the client s buffer to fill and playback to start faster Although the 541 can accommodate as many as 10 simultane ous Web listeners this number can be truncated in the interest of bett...

Страница 45: ...data If you reset Mode to Static IP then you must make the appropriate entries in all four fields and click the Save bar at the bottom Assigning a Hostname You may change the default name MODEL541 to...

Страница 46: ...ou a static IP address then it is a simple mat ter to address the 541 from anywhere Just type the IP address and port number into your browser as pic tured here But if your ISP issues a dynamic IP whi...

Страница 47: ...AoIP PCM 16 PCM 24 and PCM 32 refer to word length for Dante AoIP flows AES67 flows are locked to PCM 24 regardless of this setting Sample Rate is forced to 48kHz for AES67 streaming but 44 1kHz is th...

Страница 48: ...blic and private entries entering text that is specific to the read write strings on your SNMP Manager moni toring device Do a Save after entering your text Ports The default SNMP Ports SNMP Port 161...

Страница 49: ...er and wheth er TLS is On or Off From is the friendly name that identifies the 541 to the email or SMS text recipient You could use station call letters or something like ModMonAlarm User is the full...

Страница 50: ...om Internet Time and has sufficient inherent precision to remain accurate within this schedule Grab and drag the Time Zone Hours slider for the proper offset from Universal Coordinated Time for your l...

Страница 51: ...trator password that allows full ac cess to the 541 Web User Password Read Only will permit a lower level user to view all data but that user cannot retune the receiver or make changes to any settings...

Страница 52: ...l for restoring a previous setup or for cloning a second unit for backup service To save a profile to your computer under Configuration click Download Hardware Profile With the Firefox browser used in...

Страница 53: ...Firmware Update utility at the bot tom of the Admin screen click Select Firmware File and double click the downloaded bin file This will transfer the file to the updater as shown in the screenshot Wi...

Страница 54: ...50 This one of those intentionally left blank pages...

Страница 55: ...ion label has been removed or altered III TERMS OF WARRANTY Inovonics Inc products are warranted to be free from defects in materials and workmanship A Any discrepancies noted within THREE YEARS of th...

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