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A Blu-ray Disc jitter meter made by Yokogawa |
- Blu-ray Disc equalizer and PLL
With a Blu-ray Disc equalizer, auto-slicer, and PLL clock regeneration
circuit (66 MHz), the TA220 can measure data-to-clock jitter directly
from RF signal inputs. In addition to the conventional equalizer which
is provided as a standard feature, an optional limit equalizer is also available.
- Data-to-clock jitter and pulse width jitter measurement capability
The TA220 can measure Blu-ray Disc data-to-clock jitter and pulse width jitter
(data-to-data jitter). During pulse width measurements, any window width can be
set, so it is also possible to measure mean values and the jitter for pulse
widths other than 2T (e.g., 3T and 8T).
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- Standard-equipped with Ethernet and GP-IB interfaces
The Ethernet or GP-IB interface can be used to download TA220
measurement results to a PC, or to control measurement condition
settings or start/stop measurement.
- Measurements synchronized with an external device (inhibit
function, arming function, block sampling function)
The inhibit function allows you to measure just a specified range
using an external gate signal. The block sampling function stores
data obtained from repeated measurements. If you are taking repeated
measurements of a small recording area, you can use the arming
function to specify the measurement start point based on an external
trigger signal, and use the inhibit function to limit the measurement
area. These functions can be combined with the block sampling function
to perform repeated measurements and store measurement data, so that
you have enough samples to perform an analysis.
- Advanced I/O capabilities
The jitter ratio is converted to a 0.2 V/% (initial value) analog
voltage value and output through the JITTER DC OUT port on the rear panel,
so measurement results can be output through the A/D converter board on
the tester without using a communication interface.
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- Store/Recall function
As many as seven panel settings can be stored in and recalled from
the internal memory. You can significantly reduce the time required
to set up the jitter meter by storing settings for each evaluation
parameter in the internal memory.
- DtoC high-speed calculation function DC OUT
During data-to-clock jitter measurement, the output from JITTER DC
OUT can be updated as quickly as every two milliseconds. This
capability makes it possible to check relative jitter fluctuations
over a disc rotation using an oscilloscope or other instrument.
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