Inovonics 514 INOmini FM Multiplex Decoder

Inovonics’ INOmini 514 is a standalone decoder for FM-stereo multiplex signals. It accepts a demodulated FM-baseband input and decodes the signal to discrete left and right channel audio. The recovered stereo program is available as a professional line-level balanced output, and also as an AES digital audio signal. Local alarm “tallies” and selectable de-emphasis curves make the INOmini 514 an essential tool for professional applications wherever a stereo-baseband signal needs to be decoded and monitored.

Features:
– Decodes Composite/MPX signal into L/R audio
– Analog L/R and AES-digital program line outputs
– Accurate front-panel metering
– Front-panel alarms with rear-panel ‘tallies’ for program Audio Loss (silence sense) and stereo Pilot Loss (stereo/mono status)
– Conforms to the worldwide FM ‘pilot-tone’ system; selectable 75μs/50μs de-emphasis

Specifications:
Multiplex (MPX) Input: Unbalanced/bridging (BNC); 10k input impedance; requires 0.5V p-p minimum signal.
L/R Analog Line Outputs: Active-balanced (XLR), 200-ohm source impedance; +4dBu output at ‘0dB’ on front-panel meter.
AES Digital Output: Transformer-balanced (XLR), 44.1kHz sampling rate; –6dBFS output at ‘0dB’ on front-panel meter.
Headphone Jack: 3.5mm (TRS) for low-Z or high-Z phones; fixed listening level
Program Audio De-Emphasis: 75μs/50μs, selected with push-on jumpers under the top cover
Forced-Mono Operation: Enabled with a push-on jumper under the top cover
Audio Frequency Response: Follows selected de-emphasis characteristic ±0.5dB, 20Hz to 15kHz

Noise (Unweighted SNR re: ±75kHz deviation):
MONO: ≥72dB; analog/digital
STEREO: ≥70dB; analog/digital

Distortion: ≤0.05% THD, 20Hz to 15kHz (analog/digital)
Stereo Separation: 50dB 20Hz to 15kHz (analog/digital)
Alarm Tallies: Individual open-collector NPN transistor outputs for Program Audio Loss (either/both channels) and Pilot Loss (stereo/mono indicator)
Power Requirement: 12VDC at 230mA. 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. Alternatively the 514 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.