TA120

Yokogawa TA120F Analog Display Time Interval Analyzers (discontinuted)

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TA120
Characteristics:
  • Highprecision, highrepeatability measurements using the TIA measurement principle
  • Highspeed measurements (maximum speed: 50 ms)
  • Support for a variety of optical disk types:
  • CD (x1 to x10), DVDROM (x1 for continuous measurement; maximum x2.2 for discontinuous measurement)
  • External synchronization enabled by inhibit and external arming functions
  • Equalizer boost value settings
  • You can use front panel operations or GPIB commands to make setting changes numerically in the range from 2.0 to 6.0 dB ( in 0.1dB steps).
  • Bi-Phase measurement (optional)
  • Bi-Phase jitter measurements for up to x32 CD-R/RW
    * External I/O control (optional)
  • Level measurement (optional)
  • Measurements of RF level (Vp-p) for DVD and CD
    * DVD jitter measurement examples
Product Description:
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The TA120F digital jitter meter is an optical disk (CD/DVD) jitter meter with a limited functions found on the former models (the TA320 and TA520). The internal measurement method is based on the same TIA system as in the former models, so the TA120F can provide high-precision measurements that are fully compatible with former models within the continuous-search range (DVDx1.1).Measurements can be displayed on a seven-segment LED and an analog meter for production line applications. The maximum speed for a single measurement is 50 ms (for DVD with 105 sampling), making the TA120F suitable for production line applications which have test time requirements. A GP-IB interface, a jitter DC-OUT, an equalizer (DVDx1), and a PLL circuit (27 MHz) are standard features. In addition, Bi-Phase measurement and level measurement functions are offered as optional features.
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Functions :
  • High-precision measurements ensuring data compatibility from development to production
    The TA120F is a precision jitter meter adopting the same TIA system as that found in the high-end TA320 and TA520 time interval analyzers. The TA120F’s internal TIA measurement mechanism has a continuous sampling rate of 10 MS/s. Measurements are fully compatible with the TA320 and TA520, so high-precision measurements can be maintained from development to production.
    (The graph on the right shows data-to-clock phase difference jitter measurements for DVDx1)
  • High speed measurements improved production efficiency
    The TA120F has a fast calculation time needing only 20 ms for calculations. For DVD standard-speed EFM data (105 samples) measurements, this enables high-speed measurements at nearly 20 ms measurement time plus 20 ms calculation time. In other words, measurements are updated in approximately 40-ms intervals. This makes it possible to significantly reduce the measurement and testing time on production lines.
    In addition, jitter values are converted to 0.2 V/% before being output through DC OUT on the rear panel. This eliminates the need for a communications interface when transferring data to a computer since measurements can be uploaded as analog voltage values.
  • Self-diagnosis and self-calibration Reduction of Labor and calibration costs
    The TA120F’s time measurement unit and jitter calculation unit are fully digital and capable of standalone self-diagnosis and self-calibration. The self-diagnostic function utilizes an internal reference voltage and signal source for standalone calibration of trigger level, T-V converter, clock input phase compensation, and circuit-system delay.
    It is recommended that the TA120F be calibrated once a year. However, if precision is checked using a jitter-free signal generator (such as a frequency synthesizer) and a high-precision DC voltage generator (to check the trigger level), then you can perform the calibration at your factory. This significantly reduces on-site costs, such as shipping costs, calibration costs, shipping labor, and repair time.
  • Inhibit and external arming functions
    The TA120F features the inhibit and external arming functions for synchronization with an external signal. This allows for jitter measurements on only the data part or only the pre-pit part of each sector of optical disks. Since the TA120F calculates the jitter value based on the measured values stored to memory just like the time interval analyzers do, the TA120F can perform jitter measurements even when the standby period is long such as when performing pre-pit jitter measurements.
    An example of jitter measurement for data and pre-pit parts using inhibit and external arming functions
  • Measured-jitter correction
    The measured jitter ratios can be corrected using a linear equation with preset factors a and b such that:

    • Corrected jitter ratio (%) = a x measured jitter ratio + b (%)
    • All of the LED’s digital indication, meter reading, and jitter DC output show the corrected jitter ratio.
  • Indication of moving average jitter
    The TA120F can calculate the moving average for a specified number (1 to 10) of the most recently measured jitter or level values. The calculated average can be displayed in the LED digital indicator and meter (only at jitter measurements) as well as output as the jitter DC output.
  • Bi-Phase measurement function (option code /BP1)
    With the optional Bi-Phase measurement function, the TA120F can measure the jitter on a Bi-Phase signal (i.e., an FM-demodulated wobble signal) of x1 to x32 speed CD-R/RW. In addition, it can:

    • Calculate the jitter ratio σ/T from the clock signal T (158.730 μs/N where N is the multiple of speed from 1 to 32), in the Bi-Phase signal;
    • Display the digital value of the average of the 1T pulse widths in the Bi-Phase signal and;
    • Output Bi-Phase jitter values as an analog voltage signal and output the judgment signal from the rear panel, not merely displaying them.
  • Preset function and external I/O control function
    (option code /E1)
    You can previously save up to 7 sets of settings for your TA120F to memory and load a desired set from memory. These preset settings include all necessary settings except for the GP-IB address-very convenient for switching among settings for different measured objects such as when you have to measure jitters for CD and DVD disks. With the optional external I/O control function, the settings can be switched by simply selecting the preset No. remotely.
  • Level measurement function (option code /L1)
    The level measurement function enables measurement of the amplitude (Vp-p) of an input RF or Bi-Phase signal simultaneously with jitter measurement. The measurements are shown as digital values on the LED display as well as output as an analog voltage signal from the connector on the rear panel. In addition, the judgment signal can be output via the optional external control I/ O connector.
pdf_pic Downloads:General Specifications

FrontPanel Measurement FunctionCD jitter measurements:
For measuring 3T jitter of CD (x1 to x10 speed, in steps of x0.1)

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DVD jitter measurements:
For measuring data-to-clock phase difference jitter of DVD, and jitter of x1 to x2.2 DVD (DVD-RAM 4.7 G) with two inputs.

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Bi-Phase jitter measurements:
For measuring CD-R/RW Bi-Phase jitter (up to x32 speed)Built-in equalizer (DVDx1)
Jitter measurement for an RF signal before and after passing the equalizer by switching on/off the built-in equalizer

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Built-in PLL clock regeneration circuit (DVDx1)
Measurement of data-to-clock phase difference jitter with one RF signal input.

Phase adjustment function
Adjust the phase difference between the clock signal and the RF signal while viewing it on the meter with two inputs.

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Simultaneous meter and LED display
Simultaneous viewing of measurements on an analog meter and a seven-segment LED (numerical display).

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Presetting
Up to seven sets of measurement settings can be saved to and loaded from memory. Switchover to one of these saved sets of preset settings can be performed remotely by means of optional external I/O control.

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Rear panel GP-IB interface:Conforms to IEEE standard 488-1978

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EXT I/O:External I/O control signal connector

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JITTER DC OUT:Jitter D-A converted output

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LEVEL DC OUT:Level D-A converted output

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EQUALIZED RF/MONITOR OUT:Equalized RF signal monitor or probe adjustment output

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SLICED RF OUT:TTL50 Ω

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CLOCK OUT:TTL50 Ω

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EXT ARM IN:External arming input

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INHIBIT IN:Measurement inhibit time gate input

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KEY LOCK:Disabling/enabling keys on the front panel

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Power supply inlet:100-240 V AC, 50/60 Hz

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