The Belar Model TVM-101 Precision Aural Monitor is a wide-band TV aural modulation monitor designed to measure the total modulation characteristics of mono as well as multi-channel television transmitters.
The TVM-101 is also used as a low-distortion, low-noise main channel demodulator for driving audio monitor amplifiers and audio distortion analyzers. Wide band composite outputs are provided for Stereo, SAP, PRO and SCA monitors.
Designed to conform with the latest EIA/BTSC recommendations, the TVM-101 features a highly accurate digital modulation calibrator for mono and stereo modes. Built-in AM and FM noise measurement capability allows direct measurement of signal-to-noise ratio as well as noise due to transmitter ICPM.
Frequency Range 54 to 806 MHz (specify frequency) RF Input 1 mv to 0.2 vrms (aural) Detected Measurement Bandwidth 30 Hz to 150 kHz Frequency Response ±0.01 dB, 30 Hz to 50 kHz Linear Phase Deviation Less than ±.05° Modulation Metering Deviation Indication 100% @ 73 kHz and 100% @ 25 kHz, 0-133% range Accuracy ±2% Characteristics Selectable: semi-peak or sample-and-hold peak Peak Modulation Indicators Adjustable Indicator 1% to 199% range in 1% increments Fixed Indicator Set to indicate @ 100% Accuracy ±1% Noise Measurement Range 40 dB to 60 dB Test Functions Calibrate Provides internal standard modulation references @ 25 kHz and 73 kHz Deviations: Accuracy: ±100 Hz Calibrator Accuracy ±0.1% Deviation Meter Indicates modulation deviation of calibrator or test signal Zero Provides zero deviation for signal-to-noise measurement tests RF Level Sets proper operating input level Carrier Alarm Indicator adjusted for 90% carrier level Outputs Wideband Composite Two @ 1.5 vrms for stereo, SAP, PRO and SCA monitors Main channel Audio (Program) ±10 dBm,600 ohms, balanced Main channel Audio (Test) 5 vrms,10k ohms, unbalanced Audio Output Specifications Frequency Response ±0.01 dB, 30 Hz to 50 kHz ±0.1 dB, 30 Hz to 120 kHz Harmonic Distortion 0.01%, max (SMPTE) Signal to Noise Ratio 80 dB, min Dimensions 5.25"H x 10.25"D x 19"W (EIA Rack Mount)
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