Advanced measurement functions for everything from adjustments to testing
The TA220 has the functions you need for production line adjustments and testing, including data-to-clock jitter measurement, data-to-clock jitter measurement excluding 2T marks and spaces, clock period measurement, pulse width measurement, and input signal amplitude measurement.
Data-to-clock jitter measurement
The TA220 can internally generate a synchronous clock from an RF signal for data-to-clock jitter measurement. The polarity of data edge can be selected from "?", "?", and "?&?".
- Data-to-clock jitter measurement excluding 2T
If you select the [E2T] measurement function, you can measure data-to-clock jitter excluding the edges adjacent to 2T marks and spaces. This function is useful for testing dual-layer discs.
Clock period measurement
This function measures the period of the internally generated PLL clock. This function is useful for checking whether the disc rotation speed is stable.
Pulse width (data-to-data) jitter measurement
This function can be used to measure pulse width (data-to-data) jitter and average values. The window can be set to any value (0.00 to 999.99 nanoseconds), so you can even measure jitter and pulse width average values for recording lengths other than 2T, such as 3T and 8T. The store/recall function makes it easy to recall separate settings for each recording length |  |
Level Measurement
With this function, the amplitude (Vp-p) of the input RF signal can be measured simultaneously with the jitter measurement. This can be used when the D-to-C high-speed calculation function is off. Measurement results are displayed numerically on the front panel LED, and also output as analog voltage (initial value: 1 V/1 Vp-p) through an output connector on the rear panel. | 
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Blu-ray disc equalizer and PLL circuit
The TA220 has a conventional equalizer conforming to Blu-ray Disc RE standard version 1.0, as well as an auto-slicer and PLL clock regeneration circuit. These features can be used to measure jitter directly from an RF signal. The equalizer boost can be varied in 0.1 dB steps in the range of +3.0 dB to +9.0 dB. Maximum group delay deviation is very flat, at 1 nsp-p (3.0 MHz ? f ? 22 MHz). In addition, an optional limit equalizer can also be installed together with the conventional equalizer. Boost can be varied in the range of +3.0 dB to +9.0 dB. In addition, this equalizer has a preset menu of boost values for 23 GB, 25 GB, and 27 GB.
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 | Measured waveform with conventional equalizer |
 | Measured waveform with limit equalizer |
Store/Recall Function
As many as seven TA220 settings can be stored in and recalled from the internal memory. The stored information includes all settings other than the GP-IB address. You can recall preset settings such as measurement function changes, boost settings, and window changes for pulse width jitter measurement. Even during automatic measurement, settings can be changed in a single step using the Store/Recall function, without sending multiple commands. |  |
TA220 function block diagram