User manual

Operation Basics: Tutorial
2–14
WFM 90 & WFM 91 User Manual
Signal Reference. Press the Bezel Button below the menu selection
labeled
REF. Notice that EXT is highlighted and that EXT REF
appears in the on-screen readout. Remove the cable from the EXT
REF
input and notice that the waveform free-runs and that the
message
MISSING SYNC appears in the on-screen readout. Return
the reference selection to
INT.
Line Selection. Press the
LINE SEL button to enter the Line Select
mode. Notice that the selected line number (Line 17) is displayed in
the bar over the right two Bezel Buttons and that it is being displayed
from
ALL video fields. Line 17 is displayed on the left, with Line 18
displayed on the right in the two-line sweep. Use the Bezel Buttons
to select Line 30 for display.
Press the
MENU button to enter the Operating menu and select
2F SWEEP. Notice that the selected line is highlighted in both field
displays. Press the
LINE SEL button to return to the Line Select
menu. Press the left Bezel Button to select
1OF 2 FIELDS. Notice
that an additional menu selection of
ALT FIELD appears, that the line
number display now includes the field number, and that the selected
line is now highlighted in only the left field display. Press the
ALT FIELD Bezel Button and notice that the field number readout
changes and that the highlight bar in the waveform toggles between
the two fields.
Turn off the Line Select mode by pressing the
LINE SEL button.
Enter the Operating menu and select
2H SWEEP.
Variable Gain. Enter the Configuration menu and select the
VAR
GAIN
category. Select VAR GAIN ON and notice that a bar appears
over the right two Bezel Buttons labeled
VAR ADJUST and that the
message
GAIN UNCAL appears in the on-screen readout.
Press one of the right two Bezel Buttons just once. Notice that the
Configuration menu category list over the left Bezel Button has been
replaced with a single label of
CONFIG to provide full viewing of the
waveform, and that Up/Down arrows appear in the bar over the right
two Bezel Buttons signifying that they are enabled to adjust the
signal gain. The menu category list can be restored by pressing the
left Bezel Button or by turning off the variable gain.