FM/RDS Monitor Receiver

Share on Facebook Share on Twitter


The 633 has been replaced by model 673.

The INOmini 633 is a sensitive and selective FM and FM/RDS receiver for professional applications. It receives standard analog FM broadcast transmissions and works as a ‘confidence monitor’ or as a rebroadcast receiver in FM translator service.

The 633 also decodes and displays data from RDS/RBDS data groups. The front panel USB port supplies a raw RDS stream to be used with the supplied software and any PC for further monitoring, logging, qualification and analysis of the RDS/RBDS data groups.

In addition to essential alarms the front-panel LCD display is host to numerous menus, enabling easy setup and display of both signal quality and RDS information.

2013 NAB Show 'Pick Hit' Award winner!


  • Sensitive and selective DSP-based receiver

  • Receives worldwide-standard FM radio broadcasts and associated RDS data

  • Offers ‘Extended-Band’ coverage down to 64MHz

  • Easy setup using the LCD screen and jog-wheel navigation of the receiver’s menu tree

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

  • USB port sends RDS data to any PC for analysis. Logging software provided.

  • Analog L/R and AES-digital program line outputs

  • Front-panel alarms with rear-panel ‘tallies’ for Carrier Loss and Audio Program Loss



Tuning Range

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

Antenna Input

75-ohm (F)

Receiver Sensitivity

≤ 10μV for 50dB monaural FM S/N

Audio Frequency Response


FM De-Emphasis

75μs/50μs selectable

RDS Fields Displayed

AF, CT, DI, M/S, PI, PS, PTY, PTYN RT, RT+, TA, TP; Groups Received

Program Audio Output(s)

  • +4dBu balanced Analog Left/ Right (XLR), 200-ohm source impedance

  • AES Digital (XLR), 44.1kHz sampling rate

  • Front-Panel Headphone Jack (3.5mm TRS)

USB Port

Raw RDS data for external analysis (software provided)

Alarm Tallies

Individual open-collector NPN transistor outputs for Carrier Loss and Audio Loss

Power Requirement

12VDC at 140mA. A ‘wall-outlet transformer’ (WallWart®) switching-type power supply appropriate to the destination AC mains voltage is provided.

Mounting Options

An optional rack adapter accepts up to three INOmini modules in a 1U, 19-inch rack space, or the 633 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.