Features

• Reduction of surface noise or rumble in disc playback equipment

• Suppression of magnetic asperity noise in tape or film reproducing systems

• Quieting of optical film sound channels

• Improving S/N in interface between low grade telephone line and broadcast facilities

• Variable Threshold adjustment

• Visual indication of Threshold coincidence and full expansion

Specifications

Frequency Response

±0.5 dB, 20Hz-20kHz

Output Noise Level

Below -85dBm

Distortion

• Below 0.1% THD up to +10dBm output
• Below 0.3% THD up to +23dBm output (Clipping Level above +24dBm)

Noise Suppression Characteristics

• RUMBLE: Choice of two LF rolloff curves with restoration to flat response when low frequency energy exceeds preset Threshold.
• HISS: Choice of two HF “shelving” curves with restoration to flat response when high frequency energy exceeds preset Threshold.
• WIDEBAND NOISE: LF + HF rolloff characteristic with restoration to flat response when energy in supressed band exceeds preset Threshold.

Input

100K unbalanced (transformer optional) for nominal studio line levels of +4 or +8dBm. -03 versionaccepts unbalanced inputs between -10 and 0dBm.

Output

Feeds 600ohm lines or bridging inputs at nominal line levels. Clipping level in excess of +24dBm

Power Requirements

105-130 VAC (230V available), 50/60Hz, 0.1A.

Size and Weight

1-7/8” X 8-1/2” X 6-1/2”; 4lbs.