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Illustrative image of: Belar FMS2: Modulation Monitors: FMS2

Belar FMS2

BELAR

BSW PART:
FMS2

*FM Stereo Modulation Monitor

More Modulation Monitors

For more than 30 years Belar has been making precision modulation monitoring products and established a reputation that makes their name synonymous with reliability. Belar makes a model and options to fit every application.

The FMS2 Stereo Modulation Monitor is an all solid state precision stereo monitor designed to operate in conjunction with the Belar model FMM-2 baseband modulation monitor. The test and measurement capability of the FMS-2 is enhanced by the integration of two independent auto-ranging voltmeters allowing automatic measurement of channel separation and crosstalk, along with sub-carrier suppression and noise. Features: two independent semi-peak modulation meters for simultaneous monitoring of left and right channels; front-panel switchable de-emphasis for noise measurements; pilot alarm with front panel indicator; outputs for audio proof-of-performance measurements; two auto-ranging voltmeters with LED displays for 0 to -80 dB range measurements; stereo separation measurement capability of over 70 dB at 15 kHz; high-visibility rear-illuminated meters.

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  • Main Features:
  • Two independent semi-peak modulation meters for simultaneous monitoring of left and right channels
  • Front panel switchable de-emphasis for noise measurements
  • Pilot alarm with front panel indicator
  • Outputs for audio proof-of-performance measurements
  • Two auto-ranging voltmeters with LED displays for 0 to -80 dB range measurements
  • Stereo separation measurement capability of over 70 dB at 15 kHz
  • High visibility rear-illuminated meters
  • Specifications:
  • Input Level: 4.2 V P-P (3.5 V P-P Opt) composite
  • Input Impedance: 220k ohms, unbalanced, BNC connector
  • Metering:
  • Left Meter : Selectable: total modulation, L + R, pilot or left channel modulation
  • Right Meter: Selectable: pilot phase, L-R, 38 kHz suppression or right channel modulation
  • Auto Range Attenuator : 0-60 dB in 10 dB steps, calibrated full range readings: +3 to -80 dB
  • Modulation Meter Range: 0 to 133%
  • Modulation Meter Accuracy : Better than 2% over entire range
  • Pilot Meter Accuracy: 0.5% (6% to 13% pilot modulation)
  • Separation Left to Right : 70 dB, 10 Hz to 15 kHz, Right to Left: 70 dB, 10 Hz to 15 kHz
  • Crosstalk: L+R to L-R 85 dB min, L-R to L+R 85 dB min, SCA to L + R Greater than 90 dB, SCA to L- R Greater than 90 dB, SCA Interference Greater than 90 dB
  • Outputs: Left and Right Channel Program Audio +10 dBm, 600 ohms, balanced , Left and Right Channel Program Test 5 vrms,10k ohms, unbalanced
  • Pilot : 3 V P-P. 27k ohm source
  • Composite (less Pilot) : 4 V P-P,2k ohm source
  • Audio Output Specifications:
  • Frequency Response, Left and Right +0.25 dB, 50-15,000 Hz
  • Signal to Noise Ratio, Left and Right 90 dB min
  • Harmonic Distortion 0.01% max. 50-15,000 Hz
  • intermodulation Distortion 0.01% max (SMPTE)
  • Remote Outputs: Left Meter, Right Meter, Pilot Indicator For interface to Model MP-8 remote meter panel
  • Dimensions 5 1/4"H x 10 1/2"D x 19"W (EIA Rack Mount)
  • Power Consumption 15 watts, 117/234 VAC, 50/60 Hz
  • Shipping Weight 17 Ibs