Tektronix VM5000 Series, Быстрый старт Руководство пользователя

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Applications
Taking Measurements Across Multiple Lines
When the VM Series system takes a measurement, where the measurement is taken (you could also say when the
measurement is taken) is speci
fi ed by the line number. (If you want to measure the Luma Level, you need to make sure the
measurement is taken within the active video portion of the signal.) Sometimes you will need to take a measurement across
more than one line. (For example, you might need to verify that the Levels are consistent from the top to the bottom of the
display.) To do this, use the Multi Lines setting under Line Select on the Operation tab. Each measurement requires an
appropriate signal pattern to be present on a speci
fi ed line of the input video signal. This line number setup parameter is
con fi gured via the "Line Number" input box in the measurement’s results panel. The signal pattern is generally available on
multiples lines of the input signal. The measurement can be performed by specifying any of those individual lines.
NOTE. Some measurements are not available in Multiple Lines mode. The Setup Only, Run Only and Continuously settings
(Operation panel) are not selectable in Multiple Lines mode.
When the instrument is in Multiple lines mode, measurements are performed sequentially on each of the line numbers in the
range speci
fi ed for the selected measurement(s). The results for the individual lines are averaged and then displayed in the
measurement’s results panel. The speci fi ed line numbers for the selected measurement is displayed in the Line Number fi eld
in the corresponding results panel. When the Run Mode is set to Once & Report, the instrument generates a report fi le in the
selected format (RTF, PDF or CSV), that contains the results for all of the individual line numbers in the selected range,
followed by the averaged results calculated for the whole range.
1. Power on the instrument.
2. Select Analyze > VM HD and SD Video
V3.2 or VM VGA Video V3.2 .
70 VM Series Video Measurement System Quick Start User Manual