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Operating Instructions
1780R-Series Operator’s Manual
3–25
DC Level Measurement Procedure
1. Enter the Parade mode. Press the CONFIGURE button and then
use the vectorscope touch screen to select <GND> under the
<COUPLING> area. Press the CH B1 / CH B2 / CH B3 switch to
go to Three Line.
2. Ensure that the button under the WFM CRT is selected. Adjust
the VERT POS control to set the CH B1 (far left) trace to a
convenient reference line on the graticule. Setting the WAVE-
FORM GAIN to X5 provides increased resolution. Touch
<OFFSET> until <ON> is outlined.
3. Touch <OFFSET> until <VAR> is outlined, and touch <CH B2>
to assign large knob function to that channel.
4. Use the large knob to align CH B2 with CH B1.
5. Touch <CH B3> and use the large knob to align CH B3 with
CH B1.
6. Turn off the OFFSET MENU and change the <COUPLING>
from <GND> to <DC>. Press the CONFIGURE button to return
to the normal operating mode.
7. The DC levels of all three signals can now be read directly from
the graticule. (For NTSC graticules, one IRE = 7.142857 mV.)
Operating Instructions
1780R-Series Operator’s Manual
3–25
DC Level Measurement Procedure
1. Enter the Parade mode. Press the CONFIGURE button and then
use the vectorscope touch screen to select <GND> under the
<COUPLING> area. Press the CH B1 / CH B2 / CH B3 switch to
go to Three Line.
2. Ensure that the button under the WFM CRT is selected. Adjust
the VERT POS control to set the CH B1 (far left) trace to a
convenient reference line on the graticule. Setting the WAVE-
FORM GAIN to X5 provides increased resolution. Touch
<OFFSET> until <ON> is outlined.
3. Touch <OFFSET> until <VAR> is outlined, and touch <CH B2>
to assign large knob function to that channel.
4. Use the large knob to align CH B2 with CH B1.
5. Touch <CH B3> and use the large knob to align CH B3 with
CH B1.
6. Turn off the OFFSET MENU and change the <COUPLING>
from <GND> to <DC>. Press the CONFIGURE button to return
to the normal operating mode.
7. The DC levels of all three signals can now be read directly from
the graticule. (For NTSC graticules, one IRE = 7.142857 mV.)