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Operating Instructions
3–46
1780R-Series Operator’s Manual
i. Touch <EXT HORIZ CAL>. The large knob will now
adjust sweep length (time) with respect to the graticule.
Do not change the MAG setting (automatically set to
100 mV/div). Adjust the large knob for a horizontal
display of 10 divisions.
Vectorscope Calibration Information
READOUT INTENSITY, TRACE ROTATION, and GAIN CAL
(GAIN 1 CAL / GAIN 2 CAL for NTSC software versions 1.11 &
Up) will be circled when selected, to indicate large knob assignment.
The oscillator signal is selected by touching the <CAL OSC> area of
the screen until <ON> is outlined. It automatically reverts to <OFF>
when the Calibration menu is exited and must be reselected (if
desired) when the menu is reentered.
Vectorscope Calibration Procedure
(for Software Versions 1.11 & Up)
1. Push the front-panel CALIBRATE button to enter the Calibration
menu. If Password operation is enabled, enter the password now.
Waveform calibration will be displayed.
2. Push the button under the left CRT (LED will light) to select
Vectorscope calibration, shown in Figures 3–21, 3–22, and 3–23.
3. <READOUT INTENSITY> will be circled, and a test readout
will be displayed. Use the large knob to adjust Readout intensity.
(Only Readout intensity is adjusted through the menu; signal
intensity is adjusted with the front-panel INTENSITY control.)
4. Touch <TRACE ROTATION> to obtain a test axis, then use the
large knob to adjust trace rotation.
5. To adjust Vectorscope Gain, touch <CAL OSC> until <ON> is
outlined. While the cal oscillator is on, the V axis switcher is
enabled and 75% bars are selected (with 7.5% setup for NTSC).
a. For 1780R (NTSC), touch <GAIN 1 CAL> and use the
large knob to make the circle match the compass rose.
Touch <GAIN 2 CAL> and again use the large knob to
make the circle match the compass rose. Touch <GAIN 1
CAL>.
Operating Instructions
3–46
1780R-Series Operator’s Manual
i. Touch <EXT HORIZ CAL>. The large knob will now
adjust sweep length (time) with respect to the graticule.
Do not change the MAG setting (automatically set to
100 mV/div). Adjust the large knob for a horizontal
display of 10 divisions.
Vectorscope Calibration Information
READOUT INTENSITY, TRACE ROTATION, and GAIN CAL
(GAIN 1 CAL / GAIN 2 CAL for NTSC software versions 1.11 &
Up) will be circled when selected, to indicate large knob assignment.
The oscillator signal is selected by touching the <CAL OSC> area of
the screen until <ON> is outlined. It automatically reverts to <OFF>
when the Calibration menu is exited and must be reselected (if
desired) when the menu is reentered.
Vectorscope Calibration Procedure
(for Software Versions 1.11 & Up)
1. Push the front-panel CALIBRATE button to enter the Calibration
menu. If Password operation is enabled, enter the password now.
Waveform calibration will be displayed.
2. Push the button under the left CRT (LED will light) to select
Vectorscope calibration, shown in Figures 3–21, 3–22, and 3–23.
3. <READOUT INTENSITY> will be circled, and a test readout
will be displayed. Use the large knob to adjust Readout intensity.
(Only Readout intensity is adjusted through the menu; signal
intensity is adjusted with the front-panel INTENSITY control.)
4. Touch <TRACE ROTATION> to obtain a test axis, then use the
large knob to adjust trace rotation.
5. To adjust Vectorscope Gain, touch <CAL OSC> until <ON> is
outlined. While the cal oscillator is on, the V axis switcher is
enabled and 75% bars are selected (with 7.5% setup for NTSC).
a. For 1780R (NTSC), touch <GAIN 1 CAL> and use the
large knob to make the circle match the compass rose.
Touch <GAIN 2 CAL> and again use the large knob to
make the circle match the compass rose. Touch <GAIN 1
CAL>.