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Acquiring and Displaying Waveforms
3–18
TDS 500C, TDS 600B, & TDS 700C User Manual
Fine Scale. To make fine adjustments to the vertical scale, press VERTICAL
MENU ➞ Fine Scale (main) and use the general purpose knob or the keypad.
Position. To adjust the vertical position to a specific number of divisions, press
VERTICAL MENU ➞ Position (main) and use the general purpose knob or the
keypad to set the offset value. Press Set to 0 divs (side) if you want to reset the
reference point of the selected waveform to the center of the display.
Offset. Use offset to subtract DC bias before examining a waveform. For example,
you might want to display a small ripple (for example, 100 mV of ripple) on a
power supply output (for example, a +15 V output). Adjust offset to keep the ripple
on screen while setting the vertical scale sensitive enough to best display the ripple.
To adjust offset, press VERTICAL MENU ➞ Offset (main). Then use the
general purpose knob or keypad to set the vertical offset. Press Set to 0 V (side)
if you want to reset the offset to zero.
Set external attenuation (or gain) in addition to the attenuation specified by the
probe.
To set external attenuation, press VERTICAL MENU ➞ Probe Func-
tions (main) ➞ External Attenuation or External Attenuation in dB (side).
External Attenuation — Use the general purpose knob or the keypad to set the
external attenuation multiplier.
External Attenuation — Use the general purpose knob or the keypad to set the
external attenuation in dB.
To set the probe attenuation to its default value, press VERTICAL MENU ➞
Probe Functions (main) ➞ Set to Unity External Attenuation (side).
Attaching a probe also sets the probe attenuation to its default value.
Check the Record View to determine the size and location of the waveform
record and the location of the trigger relative to the display. (See Figure 3–7.)
To Set External
Attenuation (TDS 500C
and TDS 700C Only)
To Check the
Horizontal Status