Fluke PM3370B user manual Display Menu, Interpolation

5 - 30 FUNCTION REFERENCE

DISPLAY MENU

Description:

The DISPLAY menu offers a set of powerful display functions for the analog mode and the digital mode.

In the analog mode, the scope can be set to the X DEFLECTION mode. In this mode XY displays can be generated from a combination of any of the input channels for X and Y, while the analog timebase generator is turned off.

In the digital mode, the display menu is extended with additional display functions such as: WINDOWS, VERTICAL MAGNIFY, X vs Y, TEXT GENERATOR and

INTERPOLATION.

For the X DEFLECTION function for the analog mode, refer to X DEFLECTION further on in this chapter.

WINDOWS automatically separates the traces on the screen when more than one trace is displayed. Each trace is then displayed in a window.

When two channels are displayed, one is displayed in the upper half of the screen, and the other is displayed in the bottom half. When three traces from different channels are displayed, the screen is divided into four windows of two divisions each.

Even when only two divisions are allocated to a trace, for each trace is displayed with the full dynamic range of 8 bits and the full 256 ADC levels are still used. The displayed amplitude of the signal and its screen readout, has however, been adapted to the new window space. Also the range of the POS controls is limited to the new window. The windows mode is especially useful in multichannel applications. It eliminates trace positioning and scaling, while retaining maximum resolution, accuracy and trigger sensitivity.

VERT MAGNIFY is used to vertically expand signals without changing the AMPL/DIV setting of the input channels. It can be used to study signal details in high resolution acquisitions such as an averaged waveform. The signals can be expanded up to 32 times, and the magnification factor is displayed in the DISPLAY menu. At the same time the vertical deflection (volts/div) in the bottom text area is adjusted.

X versus Y is an XY display capability in the digital mode. It is similar to X deflection in the analog operating mode. The TRACK control is used to select the source for vertical direction (Y). The source can be any newly acquired trace but it can also be a saved trace in a memory location (e.g., m3). For horizontal direction (X) you can choose from any active channel or a signal saved in memory (e.g., m3.1) as well.