FM MODULATION MONITOR BELAR FMSA-1

The FMSA-1 is a DSP-based, microprocessor-controlled FM stereo modulation monitor/analyser.

The FMSA-1 digitises the composite baseband signal and decodes the stereo multiplexing part using digital signal processing techniques. Unlike an analogue design, a DSP-based design is immune to variations due to temperature or component ageing and tolerance. As a result, the FMSA-1 achieves superlative performance with virtually no tuning required. By employing linear phase FIR filters, the FMSA-1 eliminates phase distortion in the recovered audio. This allows unprecedented accuracy in measuring modulation peaks in left, right, L+R and L-R signals. These performance advances are the result of the mathematically pure demodulation algorithm implemented by the FMSA-1 processors.

All FMSA-1 measurements – modulation peaks, injections and dB ratios – are displayed in digital readouts. Readings can also be viewed remotely on a virtual front panel when the FMSA-1 Digital FM Monitor/Analyser is used in conjunction with the Belar Wizard FMMA-1 Digital FM Modulation Monitor/Analyser and a personal computer.

The FMSA-1 features user-defined parameters and settings for maximum flexibility. The two UP/DOWN menu keys are used to scroll the 16-digit alphanumeric display to the desired menu; the UP/DOWN parameter keys are then used to select the desired setting. The configuration can be saved to the unit’s non-volatile memory in the event of power loss.

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BELAR FMSA-1