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Measurements
1780R-Series Operator’s Manual
4–7
2. Line Select readout is provided on the waveform CRT. Make sure
the Line number is circled. If it is not, touch the screen in that
area.
3. Touch <MENU> to outline <ON> for Line Select menu display
on the vectorscope CRT. Make Line select menu choices as
desired.
4. Use large knob or < > buttons to change selected line.
Differential Gain Measurement
Enter DIFF GAIN Mode
Push the MEASURE button to enable the Measurement menu, as
shown in Figure 4–1.
Touch <DIFF GAIN> on the screen.
The DIFF GAIN menu is displayed on the left CRT, and the
demodulator sweep is displayed on the right CRT, as shown in
Figure 4–3. The instrument is now configured as specified in
Table 4–2.
Exit DIFF GAIN Mode
To exit DIFF GAIN mode, push the MEASURE button again. All
instrument settings return to previous state.
To move from DIFF GAIN mode to DIFF PHASE, touch the <GO
TO DIFF PHASE> area of the screen.
Horizontal positions, vertical positions, and gain settings defined
while in DIFF GAIN mode will be stored when exiting, and
reinstated when this mode is selected again.
DIFF GAIN Menu Selections
Noise Reduction. Touch <NOISE REDUCTION> to toggle between
<ON> and <OFF>. When noise reduction is off, the demodulator
output (500 kHz BW) is directly displayed. When noise reduction is
on, noise reduction of about 10–12 dB is accomplished without any
reduction in bandwidth.
Measurements
1780R-Series Operator’s Manual
4–7
2. Line Select readout is provided on the waveform CRT. Make sure
the Line number is circled. If it is not, touch the screen in that
area.
3. Touch <MENU> to outline <ON> for Line Select menu display
on the vectorscope CRT. Make Line select menu choices as
desired.
4. Use large knob or < > buttons to change selected line.
Differential Gain Measurement
Enter DIFF GAIN Mode
Push the MEASURE button to enable the Measurement menu, as
shown in Figure 4–1.
Touch <DIFF GAIN> on the screen.
The DIFF GAIN menu is displayed on the left CRT, and the
demodulator sweep is displayed on the right CRT, as shown in
Figure 4–3. The instrument is now configured as specified in
Table 4–2.
Exit DIFF GAIN Mode
To exit DIFF GAIN mode, push the MEASURE button again. All
instrument settings return to previous state.
To move from DIFF GAIN mode to DIFF PHASE, touch the <GO
TO DIFF PHASE> area of the screen.
Horizontal positions, vertical positions, and gain settings defined
while in DIFF GAIN mode will be stored when exiting, and
reinstated when this mode is selected again.
DIFF GAIN Menu Selections
Noise Reduction. Touch <NOISE REDUCTION> to toggle between
<ON> and <OFF>. When noise reduction is off, the demodulator
output (500 kHz BW) is directly displayed. When noise reduction is
on, noise reduction of about 10–12 dB is accomplished without any
reduction in bandwidth.