The MK-669C is intended for measurements of wow flutter in the recording/playback equipment for magnetic tapes, videotapes, discs, film, etc. in accordance with JIS, NAB, DIN (IEC/ANSI), and CCIR standards, the center frequencies used in measurements are 3kHz for RMS, NAB, and 3.15kHz for IEC (DIN/CCIR)
Wow flutter values measured with the sigma memory and peak-hold methods can be read with digital display and tape speed measurement is possible using a 4-digit frequency counter simultaneously with the wow flutter
Furthermore, the GO-NO judgment function for wow flutter and tape speed measurements is provided.
FEATURES
Wow flutter measurements possible in accordance with different standards for RMS, NAB at 3kHz and for IEC (DIN/CCIR) at 3.15kHz
Wide wow flutter range, 0.001% to 3%, for accurate measurements for all classes of recording/playback equipment.
Measurements can be made under weighted and unweighted conditions; in addition, wow and flutter can be separately determined
At IEC(DIN/CCIR) measurements, a sigma memory for three modes, 1s, 2s, and 3s, enables readings at the hold condition of the meter.
FIN (Frequency Intermodulation) measurements in accordance with DIN45411 are possible
SPECIFICATIONS
Center Frequency Range
3kHz ±300Hz and 3.15kHz ±300Hz
Input Level
0.1mV to 10Vrms : Two ranges0.1mV to 30mVrms, 5mV to 10Vrms
Input Impedance
300kO ±20%, unbalanced
Measurement Range
0.0015% to 3% in 6 ranges:
(However 0.1 to 30mV ranges is 0.003 to 3%)
0 to 0.01% , 0 to 0.3% , 0 to 0.03% , 0 to 1% , 0 to 0.1% , 0 to 3%
Indication Modes
Effective value for RMS, average value for NAB and peak value for IEC (DIN/CCIR).
Indication Accuracy
±5% of full scale at 4Hz on all ranges.
Frequency Characteristic
Weighted
0.2 to 200Hz for JIS, NAB and IEC (DIN/CCIR)
Wow Flutter
• Wow
0.5 to 6Hz
• Flutter
6 to 200Hz
Unweighted
• NAB
0.5 to 200Hz -3dB±1dB
• IEC(DIN/CCIR)
0.3 to 200Hz -3dB±1dB
Roll off
• NAB
-6dB/oct below 0.5Hz
-15dB/oct above 200Hz
•IEC(DIN/CCIR)
0.3 to 200Hz, -3 ±1dB
-6dB/oct below 0.3Hz
-15dB/oct above 200Hz
FIM (Frequency Intermodulation) Measurement
Range
Corresponding to wow flutter measurement
Filter Characteristics
• FIM at ON
Low pass filter
-3 ±1dB at 500Hz
Roll off
-36dB/oct above 500Hz
• 160Hz Filter at ON
High pass filter
-3 ±1dB at 100Hz
Roll off
-12dB/oct below 100Hz
Tape Speed Indication
3 ±1kHz : 4-digit display
Measurements With Memory
Method
Sigma memory for IEC
Peak-hold for JIS, NAB, IEC
Driving
Manual, repeat and automatic control with input monitor.(Manual or repeat operation when input signal is applied.)
Sigma Mode
3 points? 1s, 2s and 3s
Measuring Time
2.5 sec crystal-controlled
Memory Read Time
Approx. 2 to 6 seconds, variable, with internal adjustment
Preparation Time
For automatic control with input signal : 1 to seconds, variable, with internal adjustment.
Wow Flutter Digital Indication
(Counter display during readout time at memory measurements.)
Display
3 digits, effective, at 3%, 0.3% and 0.03% ranges.
2 1/2 digits, effective, at 1%, 0.1% and 0.01% ranges.
Accuracy
±(2% +1 digit) at full scale.
Display Time
Corresponds to memory readout time.
Recording Signal Source
Frequency
3kHz and 3.15kHz ±3×10-5 (crystal controlled)
Output Voltage
Approx. 0.2Vrms at open circuit
Output Impedance
Approx. 600O unbalanced
Distortion
Less than 0.5%
Drift Signal
Output Voltage
±1.0V ±10% per ±1% drift
Output Impedance
600O ±10%, unbalanced
Recorder Signal
Output Voltage
±1.0V ±10% per ±1% drift
Output Impedance
600O ±10%, unbalanced
Flutter Signal
Output Voltage
±1.0V ±10% per ±1% drift
Output Impedance
600O ±10%, unbalanced
Flutter Signal
Output Voltage
+5V (TTL level)
Frequency Counter (When used independently)
Range
10Hz to 99.99kHz in 2 ranges
0.01 to 9.999kHz and 0.1 to 99.99kHz
Accuracy
±(1count + ref. Frequency accuracy)
Reference Frequency
600kHz ±1×10-4 : crystal-controlled
Input Voltage
100mV to 10Vrms
Input Impedance
Approx. 300kO, unbalanced
Measurement Time
2 ranges: 0.1 and 1 sec
Display
4-digit
General Data
Operating Temp.
Range 0 to 40ºC
Power Requirements
100V, 115V, 215V or 230V50/60Hz (voltage selector provided)
Approx. 25VA
Dimensions, max
Approx. 360(W)×165(H)×290(D) mm
Weight
Approx. 6kg
*
Specifications are subject to change without notice.
MK-669C Wow Flutter Meter
Call For Price
Product Description
MK-669C Wow Flutter Meter
The MK-669C is intended for measurements of wow flutter in the recording/playback equipment for magnetic tapes, videotapes, discs, film, etc. in accordance with JIS, NAB, DIN (IEC/ANSI), and CCIR standards, the center frequencies used in measurements are 3kHz for RMS, NAB, and 3.15kHz for IEC (DIN/CCIR)
Wow flutter values measured with the sigma memory and peak-hold methods can be read with digital display and tape speed measurement is possible using a 4-digit frequency counter simultaneously with the wow flutter
Furthermore, the GO-NO judgment function for wow flutter and tape speed measurements is provided.
FEATURES
SPECIFICATIONS
Approx. 25VA
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