Table 1-2: Dc Offset Accuracy (Zero Setting) - Tektronix TDS 500D Technical Reference

Performance Tests
1–36
TDS 500D, TDS 600C, TDS 700D & TDS 714L Performance Verification and Specifications
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b. Set the vertical scale: Set the vertical SCALE to one of the settings
listed in Table 1–2 that is not yet checked. (Start with the first setting
listed).
H Press VERTICAL MENU. Press the main-menu button Fine Scale.
H Use the keypad to enter the vertical scale. For the 1 mV setting,
press 1, SHIFT, m, then ENTER. For the 101 mV setting, press
101, SHIFT, m, then ENTER. For the 1.01 V setting, press 1.01,
then ENTER.
H Press CLEAR MENU.
Table 1–2: DC offset accuracy (zero setting)
Vertical
Vertical scale
position and
setting
offset setting
1 mV 0
101 mV 0
1.01 V 0
10 mV 0
101 mV 0
1
Vertical position is set to 0 divisions and vertical offset to 0 V when the
oscilloscope is initialized in step 1.
c. Display the test signal: The waveform position and offset were
initialized for all channels in step 1 and are displayed as you select each
channel and its vertical scale.
d. Measure the test signal: Align the active cursor over the waveform by
rotating the general purpose knob. Ignore the other cursor. See
Figure 1–4.
e. Read the measurement results at the absolute (@:) cursor readout, not
the delta (D:) readout on screen. That is, read the offset relative to the
ground reference. See Figure 1–4.
f. Check against limits: Do the following subparts in the order listed.
H CHECK that the measurement results are within the limits listed for
the current vertical scale setting.
H Enter voltage on test record.
TDS 500D/700D/714L
TDS 600C offset
(except TDS 794D)
1
accuracy limits
offset accuracy limits
±2.1 mV ±1.6 mV
±75.6 mV ±25.1 mV
±756 mV ±251 mV
TDS694C and TDS794D
offset accuracy limits
±2.5 mV
±25.1 mV