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The Inovonics 673 INOmini FM/RDS Monitor/Receiver is Inovonics’ second-generation, small form-factor FM broadcast monitor for professional applications.


A sensitive and selective off-air receiver for standard analog-FM broadcasts, it has application as a ‘confidence monitor’ or as a rebroadcast receiver in FM translator service. The 673 decodes and displays the most important data from RDS/RBDS data groups as well.


The INOmini 673 gives front-panel and remote alarm indications of program and RDS transmission errors. It can also deliver a high-quality audio feed for program distribution throughout the broadcast facility with adjustable analog and AES digital audio outputs.

Inovonics 673 INOmini FM Receiver

    • This sensitive and selective DSP-based (SDR) receiver has extended band coverage down to 64MHz.

    • Easy front-panel setup uses jog-wheel menu navigation with a large LCD display. Accurate, hi-res metering shows RF signal and audio levels; critical system menus are hidden.

    • Front-panel display of most-essential RDS/RBDS information including RT+ ‘tagging’ data.

    • 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 RDS Loss or PI Error, Low Signal and Audio Program Loss.

    • All receiver setup parameters are held in non-volatile memory.

    • When issued, free firmware updates are easily installed in the field.

  • Tuning Range

    Extended FM band: 64MHz to 108MHz in 100kHz steps

    Antenna Input

    75-ohm (F)


    10dBμV for 50dB monaural S/N; 35dBuV for 70dB monaural S/N

    IF Bandwidth

    Auto (signal-adaptive) or manual selection of 110kHz, 84kHz,

    60kHz, 40kHz

    Audio Bandwidth

    15kHz or may be manually restricted in steps down to 2kHz


    75μs/50μs selectable

    Reception Modes

    Stereo, Auto-Blended Stereo (with front-panel stereo width display), Forced-Mono

    RDS Fields Displayed

    AF, CT, DI, M/S, PI, PS, PTY, PTYN, RT, RT+, TA, TP, Groups Received; RDS or RBDS protocols are selectable.

    Program Audio Output(s)

    Balanced Analog (XLR) Left and Right outputs are adjustable from -15dBu to +15dBu in 0.2dB steps.

    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 adjustable listening level.

    Front-Panel Red-Flashing Alarms

    • RDS: Alarm signals the loss of RDS data or font panel alarms; an error between the received PI code and a user-programmable PI code entry.
    • Low Signal: Alarm and reset trigger levels are independently adjustable relative to the RF signal level display.
    • Audio Loss: Alarm threshold is adjustable between 0dB and –40dB, and the alarm delay interval is adjustable between OFF and 120 seconds.
    • Alarm “Tallies”: Individual opencollector 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 290mA; a universal 90 - 240 VAC inline switching power supply is included with the INOmini 673 receiver.

    Mounting Options

    An optional rack adapter accepts up to three INOmini modules in a 1U, 19-inch rack space. The 673 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.

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