Adjustments
WFM90D and WFM91D ServiceManual 5-3
Adjustment Procedures
The monitor does not have any internal adjustments. All adjustments aremade
through the Calibrationmenu using the front panel buttons.
The adjustment proceduresteps are sequential. If you are unsure of equipment
connections or front-panelsettings for a specific step, review the settings and
connections forthe previous step.
Throughout these procedures,boldface type indicates that you will use a
front-panelcontrol or select a specific menu item on the WFM90D or WFM91D.
The adjustments in this section provide a valid adjustment of instrument
performance when the following requirements are met:
HTestequipment used to verify performance requirements must be calibrated
and working within the limits specifiedin Table 5--2on page 5--2.
HThe WFM90D or WFM91D must have been adjusted at an ambient
temperaturerange of +20°Cto+30°C,and must have been operating for a
warm-up periodof at least 20 minutes.
NOTE. Use only the front-panelsettings described in the procedure steps. If you
deviate fromthese settings, you may incorrectly adjust your instrument.
1. Press and hold the CONFIG button for three seconds to enter the Calibration
menu. The menu allows either analog or serialdigital adjustments, depend-
ing on which input signal is connected.The menu lists the adjustments you
can make(CAL MENU list), and displays the CAL and SAVE selections.
2. Use the arrow buttons to highlight the desired adjustment in the list and then
select CAL to begin this adjustment.
3. Use the arrow buttons to adjust the setting. Most adjustments provide a POS
(position) or PHASE menu selection,which allows you to toggle the arrow
buttons between theselected adjustment and signal positioning.
NOTE. Select SAVEfrom the Calibration menu after completing an adjustment. If
you do not save an adjustment, theinstrument will revert to th e previoussetting
at next instrument power-up.
4. Select SAVEto save the adjustment in memory.
5. Select CAL MENU to returnthe display to the main Calibration menu.

Conventions

Prerequisites

How to Adjust Instrument

Settings