Inovonics 679

FM/HD Monitor Receiver

With the Inovonics 679 FM RBDS and HD Radio PAD data may be called-up for display on the front-panel LCD screen.



The INOmini 679 by Inovonics is a third-generation, compact FM and FM-band HD Radio broadcast monitor receiver designed for professional applications. Here are its features and specifications:


  1. FM and HD Radio Reception: Receives standard FM analog and FM/HD Radio broadcasts for confidence monitoring.
  2. Non-Blending: Purposely does not blend between analog FM and HD1 simulcast like consumer radios, maintaining separate tuning and mode preferences stored in nonvolatile memory.
  3. Front-Panel Setup: Easy jog-wheel menu navigation with a large LCD display for setup and monitoring. Critical system menus are hidden.
  4. Audio Outputs: Balanced analog and AES-digital program line outputs available simultaneously, with independently adjustable levels.
  5. Alarms: Front-panel flashing-red alarms and rear-panel ‘tallies’ indicate HD Reception Loss, Low Signal, and Audio Loss.
  6. Split Mode: Audio monitoring aids transmission diversity delay setup.
  7. LCD Display: Shows RF signal and audio levels, RBDS/PAD data, reception metrics like RSSI, SNR, Cd/No, Multipath, and HD Level.
  8. Firmware Updates: Field-installable firmware updates are available when issued.


  1. Tuning Range: 87.5MHz – 107.9MHz in 100kHz steps.
  2. Antenna Input: 75-ohm (F) connector.
  3. HD Radio Channels: Selectable HD1 through HD8.
  4. Sensitivity/SNR: 10dBμV for 50dB monaural-FM S/N.
  5. Audio Response:
    • FM: ±1dB, 30Hz – 15kHz; de-emphasis selectable for 75μs or 50μs.
    • HD Radio™: ±0.25dB, 20Hz – 20kHz.
  6. FM Stereo Modes: Stereo, Stereo Auto-Blend, Forced-Mono.
  7. RDS Fields Displayed: PI (and call), C/T, PTY, PTYN, PS, RT, RT+1, RT+2.
  8. HD Pad Fields Displayed: HD Name/Slogan, HD PTY, FCC ID, HD Artist, HD Title, HD Album, HD Genre, Primary Service Mode, Coded Mode, Transmit Gain, Transmit Blend Control.
  9. Program Audio Outputs:
    • Balanced Analog (XLR): Left and Right outputs adjustable from –15dBu to +15dBu in 0.2dB steps.
    • AES Digital (XLR): Output at 44.1kHz adjustable from –30dBFS to 0dBFS in 0.2dB steps.
    • Headphone Jack (3.5mm TRS): Adjustable listening level.
  10. Front-Panel Alarms: HD Loss, Low Signal, Audio Loss with adjustable thresholds and delay intervals.
  11. USB Port: Front-panel mini-USB port for firmware updates.
  12. Power Requirement: 12VDC at 335mA; universal 90-240 VAC inline switching power supply included.
  13. Mounting Options: Optional rack adapter for 1U, 19-inch rack space or fastening to any surface with screws.
  14. Size and Weight: 1.6”H x 5.5”W x 5.5”D; 4 lbs. shipping weight.
  15. Environmental: Continuous operation at ambient temperatures between 32ºF/0ºC and 122ºF/50ºC; 0-95% relative humidity, non-condensing, altitudes to 10,000ft/3,048m.

This receiver provides comprehensive monitoring and analysis capabilities for FM and HD Radio broadcasts, suitable for professional broadcast facilities.