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14   

M4FM-HD User Manual 

System Menu  

 

Press and hold the CENTER button for 3 seconds to enter the SYSTEM menu.  Use the arrow buttons 
to navigate to the desired submenu.  To exit to the previous menu enter selection mode and toggle the 
arrow up to EXIT and press the CENTER button to revert back to the previous screen. 

 
 
 
 
 
 
 
 
 
 

Figure 9. 

 

Audio Muting

 

- The M4FM-HD’s audio output can be set to automatically mute for received signals 

with signal strength less than 45dBf.   

 

Forcing A-D Split – 

using headphones this feature puts the Digital signal in the 

left  ear  and  the  Analog  in  the  right  ear.    Enabling  SPLIT  mode  will  disable  all 
tuning until SPLIT mode is disabled. 

 

Alarms  

 
Program Loss Monitor – 

Enabling any alarm will disable tuning, presets and band selection from the 

WebServer and M4FM-HD box User interface.

 

 
Program Loss Monitor (PLM) Connections – 

The PLM provides six dry, floating relays with outputs 

on  a  rear  panel  mounted  DB15  connector  to  report  selected  alarm  conditions,  including  loss  of  RF 
carrier,  audio  loss,  OFDM  Lock  Loss,  HD  Lock  Loss,  Multicast  Loss,  and  Over  Modulation.  Opto-
isolated  inputs  will  be  triggered  by  a  voltage  of  5VDC.  The  GPIO  Alarm  output  relays  are  Normally 
Open and will close when an alarm is active.  See figure 10 for the DB15 pin-outs:  
 

Alarm Loss of: 

  No Contact  

   Common 

 

Audio   

 

 

 

           10 

 

RF Carrier  

 

 

 

 

 

OFDM Lock Loss 

 

 

 

 

HD Lock Loss   

 

 

 

 

Multicast Loss   

 

 

 

 

Over Modulation 

            11 

 

 

12 

 

Reset   

 

 

14 

 

 

15 

 

Pin 13 is not used 

 

 

Figure 10. 

 

Summary of Contents for M4FM-HD

Page 1: ...M4FM HD FM HD Modulation Monitor User Manual...

Page 2: ...ucts has evolved through a process of user feedback extensive listening field testing and careful refinement In the event that you encounter any technical or operational difficulties with this or any...

Page 3: ...oadcasts including FM multicast channels HD 2 through HD 8 user selectable tuning steps and analog FM 50 75 Sec de emphasis Frequency Agile RF Input Synthesized FM preselector provides 50 dB quieting...

Page 4: ...ly 8 2kg 18lbs shipping Important Note Please connect your M4FM HD to an uninterruptible power supply UPS to provide other protection against power surges and brownouts Service Information The DaySequ...

Page 5: ...tput with greater than 1W into 8 ohm for an uncompromised convenient audio monitor The M4FM HD rear panel has an FM composite output as well as a GPIO port that provides opto isolated reset input and...

Page 6: ...digital audio output as well as a high performance headphone output with greater than 1W into 8 ohm Email Alerts and Rear Panel Alarm Tallies For loss of Audio Carrier and RDS RBDS remote reset via re...

Page 7: ...185 0 1 IMD SMPTE 0 1 SNR IEEE 185 75 dB Channel Separation L R and R L 45 dB 30 Hz to 15 KHz Crosstalk L R to L R to L R 45 dB 30 Hz to 15 KHz Pilot Carrier Measurement 0 50 0 to 15 Injection Level A...

Page 8: ...n set at the factory to operate at 120VAC unless otherwise specified on the shipping carton The M4FM HD export version is configured for 240VAC operation Please connect your M4FM HD to an uninterrupti...

Page 9: ...on multiplexing portion of an HD Radium signal and digital carrier S N 58dB Hz thereby permitting HD Radium digital audio to be valid HD is displayed in upper right hand corner of VFD when tuner has a...

Page 10: ...press the reset button hidden behind the front panel to the right of the center button to power cycle the unit while holding all presets and other settings in memory Headphones Accepts any headphone...

Page 11: ...e selection arrow and navigate to position 1 as described above Note the arrow will timeout after 15 seconds of inactivity Press the center button again flashing arrow indicating the station is ready...

Page 12: ...ll fall back to Analog Auto Digital Force enabled in the system tab ensures the tuner will not fall back to Analog if the signal is on the edge of HD and Analog 8 Modulation enters a submenu displayin...

Page 13: ...n dB This is a read only submenu Figure 6 Demodulation Figure 7 Integer values for Positive Negative and Total Positive and Negative are displayed in This is a read only submenu Subcarriers Figure 8 I...

Page 14: ...tuning until SPLIT mode is disabled Alarms Program Loss Monitor Enabling any alarm will disable tuning presets and band selection from the WebServer and M4FM HD box User interface Program Loss Monito...

Page 15: ...the alarm ON and OFF default disabled Save Saves all conditions and exits back to the Alarm menu Audio Loss Silence Detect Threshold Navigate the arrow to Threshold and press ENTER to change the Thre...

Page 16: ...105 by default It can be manually set within the range of 100 125 in 1 increments Modulation Level Use arrow buttons to select between 100 125 modulation in 1 increments Delay Use the arrow buttons t...

Page 17: ...ing Select ON for audible alarm to beep during any active alarm condition and continue with alarm configuration menu select OFF for audible alarm to be silent during any active alarm condition Press E...

Page 18: ...current status of DHCP the static IP address Subnet Gateway and MAC address Toggle Exit with the arrow and press ENTER to exit to the previous menu More NETWORK details can be viewed Figure 15 DHCP i...

Page 19: ...t About A Read Only menu displaying the HDRadio DSP and Firmware version The selection mode arrow is defaulted to the top right corner of the menu To Exit press ENTER More ABOUT details can be viewed...

Page 20: ...dio and Demodulation levels Alarms Enables and disables each of the 6 alarms RF Carrier Loss Audio Loss OFDM Lock Loss HD Lock Loss MC Loss and Over Modulation A relay output pull down menu is availab...

Page 21: ...xt in orange 3 Artist Experience Displays album art when available 4 RF Level and SNR Displays the amount of RF strength from the tuned frequency SNR Displays READ ONLY signal to noise ratio express i...

Page 22: ...3 seconds will save the currently tuned station in that slot Hold an already saved preset for more than 3 seconds will overwrite and save the currently tuned station in that slot Unavailable when Ala...

Page 23: ...rations sets the individual conditions for each of the 6 alarms Slide the Enable switch to the right to enable an alarm The M4FM HD box user interface will display the exact state of the alarm under S...

Page 24: ...ate FTP Settings Enables and disables the use of a private FTP site to store firmware updates Enabling this feature will direct the M4FM HD to the host IP provided by the user when checking for firmwa...

Page 25: ...enuates the amount of RF to the tuner in high RF areas by 30 dB c De Emphasis Switch between 75 sec and 50 sec M4FM HD is set to 75 sec by default Press ENTER after making a selection to save and EXIT...

Page 26: ...dically b Local update select to update locally Contact DaySequerra to obtain a compiled bin file to upload via the local update GUI c Downgrade firmware Downloads the previous firmware version 1 iter...

Page 27: ...be void in the event a covered product has been damaged or failure is caused by or attributable to acts of God abuse accident misuse improper or abnormal usage failure to follow instructions improper...

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