Inovonics INOmini Model 679 FM/HD-Radio Receiver



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FM/HD Radio Monitor/Receiver

User Guide Related Products Data Sheet 

The INOmini 679 is Inovonics’ third-generation, small form-factor FM and FM-band HD Radio broadcast monitor receiver. It receives both analog FM and digital HD1-HD8 radio channels for confidence monitoring and delivers a high-quality audio feed for rebroadcast or program distributed throughout the broadcast facility with adjustable analog and AES digital audio outputs.

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

Strictly for professional applications, the INOmini 679 purposely does not blend between the analog FM and HD1 simulcast like a consumer radio. Tuning and mode preferences are held in non-volatile memory and all settings are restored following a power cycle.



  • The INOmini 679 is a sensitive, DSP-based (SDR) radio that receives standard FM analog and FM/HD Radio broadcasts.
  • Stays on-mode and on-channel through signal and power loss; does not blend between FM and HD.
  • Easy front-panel setup uses jog-wheel menu navigation with a large LCD display. Accurate, hi-res metering shows RF signal and audio levels, RBDS/PAD data and reception metrics. Critical system menus are hidden.
  • Balanced analog and AES-digital program line outputs are available simultaneously; levels are independently adjustable.
  • Flashing-red front-panel alarms and rear-panel ‘tallies’ indicate HD Reception Loss, Low Signal and Audio Loss.
  • ‘Split Mode’ audio monitoring aids transmission diversity delay setup.
  • The LCD displays RSSI, SNR, Cd/No, Multipath and HD Level metrics to help with receive antenna alignment.
  • When issued, free firmware updates are easily installed in the field.


Tuning Range
87.5MHz – 107.9MHz in 100kHz steps

Antenna Input
75-ohm (F)

HD Radio™ Channels
Selectable HD1 through HD8 

10dBμV for 50dB monaural-FM S/N

Audio Response

  • FM: ±1dB, 30Hz – 15kHz; de-emphasis is menu-selectable for 75μs or 50μs
  • HD Radio™: ±0.25dB, 20Hz – 20kHz

FM Stereo Modes
Stereo / Stereo Auto-Blend / Forced-Mono

 RDS Fields Displayed
PI (and call), C/T, PTY, PTYN, PS, RT, RT+1, RT+2

HD Radio™ Channels
Selectable HD1 through HD8

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

Program Audio Outputs

  • Balanced Analog: (XLR) Left and Right outputs are adjustable from
    –15dBu to +15dBu in 0.2dB steps
  • AES Digital: (XLR) output at 44.1kHz is adjustable from –30dBFS to 0dBFS in 0.2dB steps 
  • Headphone Jack: (3.5mm TRS) has an adjustable listening level.


Front-Panel Red-Flashing Alarms

  • HD Loss: Fixed metrics determine loss of HD Radio reception.
  • Low Signal: Alarm and reset trigger levels are independently adjustable relative to the FM carrier level display.
  • Audio Loss: Alarm responds to monitored service (FM or HD Radio).
  • Alarm threshold is adjustable between 0dB and –40dB, and the alarm delay interval is adjustable between OFF and 120 seconds.
  • Alarm “Tallies”: Individual open-collector NPN transistor outputs to ground are programmable for logic polarity.


USB Port
The front-panel mini-USB port allows the quick uploading of firmware updates when issued.

Power Requirement
12VDC at 335mA; a universal 90-240 VAC inline switching power supply is included with the INOmini 679 receiver.

Mounting Options
An optional rack adapter accepts up to three INOmini modules in a 1U, 19-inch rack space. The 679 also may easily be fastened to any convenient surface with two small screws.

Size and Weight
1.6”H x 5.5”W x 5.5”D; 4 lbs. shipping weight

User Guide Related Products Data Sheet 

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