The MDJ-6370 is designed for measuring the jitter in the 3T component of the EFM modulated signal of DVD (6), CD players, CD-ROM drivers and other devices at 1, DVD (6) and 12 speed. It extracts the 3T component of the EFM signal and measures the jitter in real time.
It also indicates GO or NO-GO with lamps according to preset GO/NO-GO threshold values and displays the results on the meter.
In addition, measurements at high speed are possible since the T/V conversion method is employed.

1. 1, DVD (6) and 12 speed measurements are selectable on the front panel.

2. The 3T jitter of the EFM signal of disk drivers can be read directly, from the meter.

3. The jitter value is indicated in standard deviation (SIGMA mode).

4. Changes in the jitter can be read continuously, due to the T/V conversion method of measurement.

5. A GO/NO-GO result is indicated in relation to a preset jitter threshold value.

6. The polarity of the 3T measurement can be selected (positive-going or negative-going)

7. Improvements in the compensation circuit for the period have resulted in highly stable operation when the signal

    is in the asymmetrical condition.

8. A jitter output connector enables the jitter waveform to be observed on an oscilloscope.

9. A remote control function is provided.


Jitter Measurements
Measurement Speed
1, DVD, 12 speed (selectable by RPM switch)
3T Center Frequency 1 720.3kHz
DVD(6) 4.500MHz 12 8.6436MHz
Max, Speed deviation Range
5% at 3T center frequency
Measurement Range 1 ~ 30ns in 1ns
DVD(6) ~ 9ns in 0.2ns 12 ~ 3ns in 0.1ns
Measurement Accuracy
[3% of f. s. at 1 ] [5% of f. s. at DVD(6) and 12]
Polarity of Input Signal
Positive or Negative of 3T signal, selectable
Pulse Compensating Range
Less than 0.5T of the prescribed speed
(Asymmetric variable range)
Output Characteristics
RECORD output 1V f.s.
JITTER output 1V at 0.5T
MONITOR output 10% of Input signal
  Input Characteristics
Input Signal EFM signal (HF or Logic signal)
Level Range 0.1Vp-p ~ 5 Vp-p (3T)
Input Impedance Approx. 1M Ohm
Input Capacitance Less than 25pF

Remote Control Function A remote control operation is available         

General Date
Operating Temperature  5ºC to 35ºC
Power Requirement
85 ~ 235V AC 10%, 50Hz ~ 60Hz
Dimensions & Weight
Approx. 150(W) 220(H) 325(D)mm, 3.9kg

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