Fluke PM3370B user manual Deflection X-DEFL, X vs Y

5 - 96 FUNCTION REFERENCE

X-DEFLECTION (X-DEFL, X vs Y)

Description:

X-deflection creates X-Y displays in which one input signal is displayed as function of another. To obtain X-Y displays in the analog mode, the oscilloscope can be set to X-DEFLection mode. In the digital mode a similar function is called X vs Y mode. In both cases a display of amplitude vs amplitude instead of the display of amplitude vs time is visible.

In the analog mode, X-DEFL uses a signal from one of the input channels for horizontal direction. Also the line voltage or EXT TRIG channel can be used for X-deflection. Any of the input channels can be selected for vertical deflection.

In the digital mode, X vs Y also uses a signal from one of the input channels. X vs Y displays can also be displayed from signals previously stored in memory. In this case the memory register (e.g., m3) must first be selected with the TRACK control. The horizontal deflection source can then be any of the active trace registers (e.g., m3.2).

The selections are made in the DISPLAY menu under the X-DEFL or X vs Y menu softkey. After the function is switched ‘on’, the source selection becomes visible. In all cases the active X deflection source is displayed at the bottom right of the screen and the Y deflection source(s) at the bottom left of the screen.

To achieve correct scaling and positioning, use the channel AMPL front panel key pair, their POS controls and the XPOS control in the analog mode. For the digital mode, use the VERT MAGNIFY under the DISPLAY menu and the XPOS control.