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MWJ-6393U BD Jitter Meter Unit
* End of production


This MWJ-6393U, Blu-ray Jitter Meter unit is a built-in type and is designed for measuring and indicating the jitter components of the data signals (1-7 modulation signals) from Blu-ray Disc drives employed as input signals and the clock signal extracted by the internal PLL circuit employed as a reference signal.
It has the conventional equalizer, as standard and the boots level of it can be adjustable.
The inhibit function is provided to inhibit jitter measurement of faulty section and also, the limit equalizer is available as factory option.


Conventional equalizer provided as standard
The conventional equalizer conforming to Blu-ray Disc standards is provided and the boost level can be adjustable. The measurements of the media with 23.3GB, 25.0GB and 27.0GB are possible by the setting value.
The polarity of the measurement
It can select either + or - edge of the data signal, and also select +, - or +/- edge for jitter measurement.
INHIBIT function
The inhibit function is provided to inhibit jitter measurement of faulty section.
Auto frequency compensation circuit
Since an automatic frequency compensation circuit is provided, the jitter value can be read by a percent value accurately even if the clock frequency changes.
2T Rejection function
It can measure jitter values without 2T signal requested by Dual layer Disc measurement.
Remote control function
The DATA EDGE, RANGE, LIMIT EQ. & 2T REJ. function on the front panel can be remote-controlled by control signals.
Limit equalizer as option
The limit equalizer is available as option.
AC power operating is available
A casing design possible by request


 Input Section
Input signal 1-7 modulation signals with 64MHz to 68MHz as reference clock frequency.
MAX. Input Level ±10VDC or less, 3.5Vrms or less
Input level range 0.1Vp-p to 1.0Vp-p
Input Impedance 50Ω, unbalance
Input junction SMB Connector

 Measuring Section
Jitter Measuring Range ±0.5T to the clock edge
Measuring Data Edge +, - or +/- (selectable)
Conventional Equalizer
• Frequency Characteristion Conforms to Blu-ray Disc Standards(Part.1 Ver.1.0)
• Standard Setting +5.8dB±0.3dB (16.5MHz - 200kHz @66MHz)
• Group Dley Characteristion Max. 2ns (3MHz to 16.5MHz)
• Variable Range 0dB to 9.0dB
PLL circuit
• Synchronous range 64MHz to 68MHz
• Frequency Characteristion Conforms to Blu-ray Disc Standards(Part.1 Ver.1.0)

 Input/output terminal
RECORDER 0.1V/% ±50mV (open circuit)
• Input Level TTL level
• Logic Active LOW (Logic selection is availabl)
REMOTE ALL functions on the panel except PRESET are externally controllable

 Factory Option
EQUALIZER Limit Equalizer Conforms to Blu-ray Disc Standards
( Part.1, Ver.1.0)
EQUALIZER Output 0.5Vp-p at 50Ω load
DATA Output 0.25Vp-p at 50Ω load
CLOCK Output 0.25Vp-p at 50Ω load
JITTER Output 10% at 0.1Vrms at 50Ω load

Operating Temperature Range    0ºC to +40ºC
Guarantee Temperature Range +15ºC to +35ºC
Power requirements AC100 / 120-220/240V, 50 / 60Hz 15VA
Dimentions 132(W)×30(H)×222(D)mm
Weight Approx. 0.24kg


* Specifications are subject to change without notice.


Copyright© 1999 MEGURO ELECTRONICS CORPORATION All Rights Reserved.