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Specifications
1–4
WFM 90 and WFM 91 Service Manual
Waveform-in-Picture Display Mode. The Waveform-in-Picture (WIP) display
mode provides a 1/4-screen-sized window over the Picture display for any one of
the Waveform, Vector, or Audio displays. The WIP window can be positioned to
any one of the four corners of the display. The Arrow Buttons retain their default
function for the display mode in the WIP window.
Line Select Mode. The Line Select mode enables you to select any line of video
for viewing in either the Waveform or Vector display modes. The desired line
can be selected from either all video fields or from alternating fields. With
two-field sweep selected in the Waveform display mode, the selected line is
highlighted in the field display.
Time-out Mode. When the Time-out mode is enabled, power is turned off to the
display backlight and/or the instrument when the front panel has not been in use
for a menu-selected length of time.
Amplitude Alarm Mode. The Amplitude Alarm mode provides automatic signal
level checking in the Waveform and Audio display modes. In the Waveform
display mode, the portion of the waveform exceeding the 100 IRE (1.0 V PAL)
graticule line is highlighted. In the Audio display mode, the portion of the
waveform exceeding the selected reference level is highlighted.
Preset Menu. The Preset menu allows you to store the current instrument front
panel and menu settings for future use. In addition, there is a menu selection that
sets the front-panel and menu settings back to the factory-set defaults. Refer to
Default Settings on page 2–10 for a list of the default settings.
Instrument Readjustment. This instrument can be adjusted entirely from the front
panel after entering the Calibration menu. Instructions for adjusting the
instrument are located in the Adjustment Procedures section of this manual.
The location of some additional information is listed below:
H Refer to Battery Operation on page 2–3 for information on operating the
instrument with batteries
H Front panel operation is described in the Operating Information section
H Instrument options are listed in the Options section
H Standard and optional accessories are listed in the Replaceable Mechanical
Parts section
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