LE 1870
DIGITAL PROCESSING JITTER METER

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TIA High Speed & Accuracy Jitter Measurement

The LE 1870 Jitter Meter is designed to quickly and accurately measure the jitter of RF (DATA) signals conforming to the DVD Book (DVD Specifications for Read-Only Disc) with respect to the clock signal using digital processing method (i.e., same method as used by TIA).
A large meter and LED panel allow this instrument ideal for production and inspection applications, as well as R&D.
Since CD-R measurement unit to measure jitter of biphase signal is optionally available, DVD, CD, and CD-R/RW can be mesured using this instrument alone.

[DVD Measurements]

• High speed and accuracy measurement by the digital operation system
  By adopting the same digital operation system of TIA to the rms operation, the LE 1870 deliver the high speed and accuracy measurement.
• The LE 1870 measures 3T through 11T and 14T in the DATA signal with respect to the clock signal and displays jitter in sigma format, and also offers the measurement of narrow pulse 3T jitter.
• Jitter value in % and sigma
  The value can be selected to display in unit of percentage with respect to the clock and to display in unit of sigma making jitter as absolute value. At the percentage display, the automatic operational circuit precisely measures up to 10% fluctuation of the DATA signal.
• Jitter measurement in three polarities
  Jitter at the rise, fall, and both edges of the DATA signal can be measured in signal-signal and two-signal measurement modes.
• Response up to double speed
  Measure the jitter between RF (DATA) signal and regenerated clock signal in inside and display in sigma value.

[For general function]

• High measurement level sensitivity
  DATA signal can be measured for signal whose amplitude is equal to or more than 50 mVp-p.
• Input impedance can be selected either 50 or 1 M
  Both 50 input which is internally terminated, and 1 M input which is used with 10:1 oscilloscope probe lessen the disturbance to the system under test.
• Simultaneous measurement, jitter and RF signal level
  Display the peak level(p-p) of the DATA signal in digital.
• Analog display for easy adjustment and digital display for parallax free
  The LE 1870 is equipped with both large meter and large digital indicators. The result of jitter measurements can be displayed either on meter or on digital indicator.
• Measurement inhibit
  The INHIBIT IN connector is provided. This function inhibits jitter measurement when a disc replay malfunction like kickback occurs.
• Various monitor output
  DATA signal monitor is available and the DC output proportional to the jitter and level indication are provided.
• Built-in Auto slicer
  Auto slicer which has response features conforming to DVD book is built-in.

[On the Production Line]

• Convenient GO/NO GO judgement for the production line
  The GO/NO GO result judgement is based on the comparison between the set standard and measured value of level, and is indicated on the LEDs and outputted.
• REMOTE CONTROL function
  Jitter measurement range and other panel functions can be remotely controlled.
• RS232C is equipped as standard
  RS232C provides you panel operation and lets you transfer the measured level and jitter level to a personal computer.
• Easy setting
  Jog dial system offers you easy setting for judgement standard, response time, slice level. All the setting are stored as last memories on each mode/speed of DVD, CD, CD-R.

[Versatile Options]

• Available to measure a jitter of CD-R/RW up to x32 speed.
  With an option for CD-R/RW, 1T jitter of Bi-phase signal can be measured.
• Accurate measurement by equalizer conforms to DVD book
  Optional RF equalizer allows direct input measurement of the pickup signal at the production line of pickup.