The Kikusui 6701 Wow/Flutter Meter is a laboratory instrument for quantifying speed variations in analog audio and video recording devices. It measures “wow” (slow speed variations) and “flutter” (rapid speed variations) with exceptional sensitivity, achieving full-scale detection at 0.01% with minimum divisions of 0.002%. The instrument accepts direct playback head signals down to 100 μV (-80 dBv), eliminating the need for external preamplification. Compliance with JIS, CCIR, DIN, and NAB standards enables deployment across diverse regional testing protocols. A dual-mode measurement architecture supports both weighted measurements aligned to human auditory perception and linear unweighted analysis. The integrated 4-digit frequency counter measures tape speed independently from 10 Hz to 9999 Hz, or as a frequency ratio relative to the 3 kHz / 3.15 kHz reference signal generated by an internal crystal oscillator. Gate time reference selectable between crystal oscillator output and AC line frequency (50/60 Hz) ensures measurement flexibility in varied laboratory environments. Oscilloscope and pen recorder outputs enable real-time observation and permanent recording of wow/flutter waveforms and period characteristics.
## Technical Specifications
• Measurement Standards: JIS, CCIR, DIN, NAB
• Reference Signal Frequency: 3 kHz / 3.15 kHz
• Wow/Flutter Full Scale Range: 0.01%
• Wow/Flutter Minimum Measuring Division: 0.002%
• Input Voltage Sensitivity (Maximum): 100 μV (-80 dBv)
• Frequency Counter: 4-digit, 10 Hz to 9999 Hz independent range
• Gate Time Reference: Crystal oscillator or AC line (50/60 Hz)
• Frequency Ratio Measurement: Relative to 3 kHz / 3.15 kHz reference
## Key Features
• Weighted and linear measurement modes for standards compliance or overall analysis
• Crystal oscillator reference for signal stability
• Direct measurement of playback head outputs without external amplification
• Simultaneous tape speed indication via frequency counter
• Dual output terminals: oscilloscope and pen recorder connections
## Typical Applications
• Audio tape recorder performance assessment
• Video tape recorder speed variation analysis
• Turntable and disc record player fidelity verification
• Cassette deck quality control
• Cine sound recorder and other analog device maintenance
## Compatibility & Integration
Compatible with tape recorders, turntables, disc players, video recorders, cassette decks, and cine sound systems. Measurement data outputs to both oscilloscope displays and pen recorders for documentation.
