WFM90D and WFM91D ServiceManual 2-7
Functional Overview
This section describesthe WFM90D and WFM91D controls and connectors.

Keypad Controls

The keypad (frontpanel) is illustrated in Figure 2--6.
ON. The ON button toggles the instrument power on and off. The current
instrument keypadand menu selections are saved when you turn off the
instrument using this button. The instrumentconfiguration is not saved if the
power sourceis removed beforeyou turn off the instrument with this button.
WFM. Pressingthe WFM button enters the Waveform display mode.
VECT. Pressingthe VECT button enters the Vector display mode.
AUDIO. Pressing theAUDIO button enters the Audio display mode.
PIX. Pressing the PIX button enters the Picture display mode.
WIP. Pressingthe WIP button enters the Waveform-in-Picturedisplay mode.
The previously selecteddisplay mode, other than Picture, is shown in a
1/4-screen-sizedwindow that overlays the Picture display.

Power Switch

Display Mode Selection