User manual

Operation Basics: Tutorial
WFM 90 & WFM 91 User Manual
2–15
Use the right two Bezel Buttons to adjust the signal gain to any
desired level. Select
VAR GAIN OFF and notice that the waveform
gain is restored to 100%. Select
VAR GAIN ON again and notice that
the waveform gain returns to your adjusted setting.
Leave the variable gain on and the Configuration menu open, and
proceed to the next step.
4. Using the vectorscope
Press the
VECT button to enter the Vector display mode. Notice that
the Configuration menu is still open and that the vector waveform
gain is the same as it was adjusted in the previous step in the
Waveform display mode. Turn off the variable gain and press the
CONFIG button to exit the Configuration menu.
Phase Adjustment. The Arrow Buttons adjust the vector phase. Press
and hold the
Y button. Notice how fast the phase of the waveform
changes. Press and hold the
" button. Notice that the phase changes
at a much faster rate. The same is true for the
B and A buttons.
Adjust the burst vector back to the 180° graticule line so that the
vector dots land in the target boxes.
Bar Amplitude. Select 100% color bars output from the television
signal generator. Notice that vector waveform is too large to land in
the target boxes. Enter the Configuration menu and select the
VECTOR category. Select 100% BARS and notice that the vector
waveform now lands in the target boxes. Select 75% color bars
output from the signal generator and return the menu setting to
75% BARS.
Setup. This menu selection appears in the WFM 90 only. Select
SETUP NO from the menu and notice that the vector waveform does
not land in the target boxes. Select an NTSC color bar signal without
setup from the signal generator and notice that the vector dots again
land in the target boxes. Select
SETUP YES from the menu and set
the signal generator for a 75% color bar output with setup.