9. EYE PATTERN DISPLAY (SER02/SER09)
190
Figure 9-5 Unit interval
9.2
Jitter Display Explanation
●
Measurement
In the jitter display mode, the jitter component is extracted from the input signal and plotted
on a time graph. The time (horizontal) axis can be displayed in different ways depending on
the data interval of the lines, fields, or frames, which are being transmitted in the SDI
signal.
●
Automatic Measurement
Timing jitter (T.J) and current jitter (C.J) are automatically measured and displayed on the
jitter display screen. The measurement range is 0.00 to 9.60 UI.
SMPTE defines two methods of measuring jitter. One method uses an eye pattern, and the
other method uses a phase detector.
The eye pattern method has disadvantages not only that measurements are difficult when
the eye is not open but that measurements are prone to errors because the distinction
between waveform distortion (such as noise and sags) and jitter is difficult.
In contrast, the phase detector method makes jitter measurements with small errors
possible even when the eye pattern is closed and even when the amount of jitter is 1 UI or
more.
The LV 5490SER02 uses the phase detector method.
Measured values are normally displayed in white, but they are displayed in red if they
exceed the values that you have specified in the error setup. If 10.00 UI is exceeded,
“OVER” is displayed.
Reference Section 9.9, “Configuring Error Detection Settings”
Summary of Contents for LV 5480
Page 15: ...2 VIDEO SIGNAL WAVEFORM DISPLAY 7 SCALE UNIT HDV SDV SCALE UNIT HD SD SCALE UNIT 150 ...
Page 38: ...2 VIDEO SIGNAL WAVEFORM DISPLAY 30 COLOR MATRIX XYZ COLOR MATRIX GBR COLOR MATRIX RGB ...
Page 98: ...5 PICTURE DISPLAY 90 STATUS INFO ON Figure 5 34 Turning the information on and off ...