BELAR FM STEREO MODULATION MONITOR, MODEL FMS-2
The Belar Model FMS-2 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 FMS-2 is also used for test functions in conjunction with the model FMM-2 to ensure the proper performance of FM stereo transmitters. The test and measurement capability of the FMS-2 is further 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. For example, depressing the left and right channel buttons automatically registers the wanted and unwanted channel for instant separation measurements. A front panel hold button can be used to lock the autorange to the displayed range.
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
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