Taking Cursor Measurements
TDS 420A, TDS 430A, TDS 460A & TDS 510A User Manual
3–121
Video Line and IRE Units
Figure 3–66: Video Line and IRE Units (TDS 400A shown)
If you have option 05 Video Trigger and are measuring NTSC signals, you can
choose to display vertical readings in IRE units (see Figure 3–66). To switch
between IRE and base cursor units, do the following steps:
1. Press CURSOR
➞ Amplitude Units (main) ➞ IRE (NTSC).
2. To return to normal, press CURSOR
➞ Amplitude Units (main) ➞ Base.
To change the cursors speed, press SHIFT before turning the general purpose
knob. The cursors move faster when the SHIFT button is lighted and the display
reads Coarse Knobs in the upper right corner.
Select Amplitude Units
Select Cursor Speed
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