Inovonics 631 FM Receiver

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Inovonics 631 Re-broadcast FM Receiver/ Rebroadcast 


Inovonics' Model 631 is our second generation of frequency-agile, digitally tuned receivers for FM translator and other critical off-air reception applications. Featuring menu-driven access of display and function selections, the 631 provides a switchable IF bandwidth to help solve difficult adjacent-signal problems and readouts of signal strength and multipath distortion to aid antenna alignment. Selectable options and alarms may be remotely controlled or monitored, and high-resolution bargraph readouts give accurate indications of incoming RF and MPX/stereo audio levels.


Features


  • Easy to set-up and use
  • Selectable wide/narrow IF bandwidth
  • Composite/MPX and balanced L/R stereo outputs
  • LCD Display
  • Menu-driven selection of functions and readouts
  • High-resolution bargraph displays indicate:
    • MPX and audio levels
    • Total carrier modulation
    • Left/Right audio levels
    • Incoming RF
    • Multipath distortion
  • Digitally-tuned
  • Carrier-loss and audio-loss alarms

TUNING RANGE


87.5 –108.1MHz in 100kHz steps.

ANTENNA INPUT


75-ohm, ‘F’ connector (50-ohm option with ‘N’ connector available).

RECEIVER SENSITIVITY

  • MONO: 10μV for 60dB S/N
  • STEREO: 150μV for 60dB S/N.

RECEIVER SELECTIVITY

  • WIDE: –6dB at ±140kHz
  • NARROW: –6dB at ±80kHz

DISTORTION (in MPX or L/R audio)

  • WIDE: <0.2% THD
  • NARROW: <0.6% THD

STEREO SEPARATION

  • WIDE: typ. >40dB
  • NARROW: typ. >20dB

COMPOSITE/MPX OUTPUT 


Unbalanced, 75-ohm BNC; adjustable between 2V p-p and 6V p-p at ±75kHz carrier deviation.

OVERDEVIATION LIMITER 


An internal clipping circuit limits the MPX output to a maximum level equivalent to ±100kHz carrier deviation.

PROGRAM LINE OUTPUTS


Left/Right active-balanced XLR outputs deliver 4dBm at ±75kHz deviation.
Frequency response ±0.5dB, 20Hz–15kHz
de-emphasis set by internal jumpers to 75μs or 50μs.

LOW-SIGNAL MUTING


Composite/MPX and L/R audio muted when incoming RF falls below the user-programmed LOW-SIG level.

AUDIO LOSS ALARM


Responds to loss of either stereo channel; alarm delay is user-programmable between 5 seconds and 4 minutes.

FAULT INDICATORS


Front-panel LCD indication of low incoming RF or loss of program audio. Open-collector NPN transistor switches enable remote alarm indication via rear-panel terminal strip.

POWER REQUIREMENTS


105-130VAC and 210-260VAC; 50/60Hz; 20W.

SIZE AND SHIPPING WEIGHT


23” x 16” x 2” (2U); 8 lbs
584mm x 406mm x 51mm ; 3.6 kg
Inovonics 631 Rebroadcast Receiver Datasheet