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2.5
Display
Meter Display <<For procedures, see section 5.1>>
Display of Numerical Values and Characters
Determination Display of Jitter Ratio <<For procedures, see section 5.3>>
IM 704610-01E
The TA220 indicates the jitter and jitter ratio on the analog meter.
Jitter Ratio Indication
The jitter ratio of the selected measurement function is indicated on the analog meter.
You can select a scale for the meter of 10% or 20%. The indication range is 0% to 11%
for the 10% scale and 0% to 22% for the 20% scale.
Jitter Indication
The jitter of the selected measurement function is indicated on the analog meter. The
scale is marked in units of time (seconds) on the bottom of the meter. You can switch
the range of the scale from 0.5 ns to 5.0 µs. The range is shown on Display 2.
The TA220 displays numerical values and alphabetical characters such as the jitter, jitter
ratio, average value, specified value, error code, and firmware version on Display 1 or
Display 2.
Numerical Display of Measured Results <<For procedures, see section 5.2>>
Measured results (the jitter ratio, jitter, and average value) are displayed numerically on
Display 1. Display 1 is a red 7-segment LED. Display 1 is used for settings, error codes,
and the firmware version.
Character and Numerical Display of Setting Parameters and Values
Setting parameters are shown using alphabetical characters on Display 2. Display 2 is a
green dot matrix LED. For certain setting parameters, you can display the numerical
measured result on Display 1 while simultaneously displaying a setting parameter and
setting value on Display 2.
Turning OFF Numerical/Character Display <<For procedures, see section 5.2>>
If you are distracted by the changing jitter ratio, jitter, or average values, or blinking
setting values, you can turn both Display 1 and Display 2 OFF.
You can set the determination level for the jitter ratio and display determination results as
GO or NO-GO. The GO indicator illuminates in green when the jitter ratio is less than or
equal to the determination level, and the NO-GO indicator illuminates in red when the
jitter ratio exceeds the determination level. If a clock signal can not be regenerated by
the PLL circuit during D-to-C measurement, both GO and NO-GO indicators illuminate in
green and red respectively.
2
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