Tektronix NetTek YBT250, Руководство пользователя

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Displaying a Signal Spectrum
YBT250 Field Transmitter & Interference Tester User Manual
3- 25
Mask Testing
Mask testing is used to determine if a signal exceeds specified levels.
The YBT250 can perform several actions when an input signal
exceeds limits defined by a mask. The default action is to display an
icon (
) to the right of the graph (which cannot be switched off)
and sound a beep (which can be switched off). A trace that exceeds
limits can trigger additional actions such as pausing the display,
exporting a screen and saving results to a file.
Creating a Mask
Masks are created with the Mask Maker utility. A mask consists of
one or more traces. Each trace consists of at least one point.
Creating a new mask. To create a mask:
1. Tap the Spectrum button.
2. Set the measurement frequency to the center of the
spectrum graph by tapping the Move to Center icon.
3.
From the
Tools
menu, select
Mask Maker
. This displays the
Mask Maker utility. See Figure 3--18.