Table 1- 2: Dc Offset Accuracy - Tektronix TDS 430A Technical Reference

Performance Tests
Check DC Voltage
Measurement Accuracy
(Averaged)
1- 22

Table 1- 2: DC Offset Accuracy

Vertical Vertical
Scale Setting Position
1 mV 0
100 mV 0
1 V 0
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.)
c. Set the offset: Press the VERTICAL MENU button and then the Offset
main-menu button. Using the General Purpose knob, set the offset as
dictated by Table 1- -2. (Start with the first setting listed.)
d. Set the generator: Set the DC calibration generator to match the vertical
scale as dictated by Table 1- -2. (Start with the first setting listed.)
e. Check against limits: Do the following subparts in the order listed.
H Subtract the measured mean from the generator setting. The result is
the offset accuracy
H CHECK that the offset accuracy is within the limits listed for the
current vertical scale setting.
H Repeat substeps b through e until all vertical scale settings listed in
Table 1- -2 are checked for the channel under test.
Test all channels: Repeat substeps a through e for all input channels.
f.
3. Disconnect the hookup:
a. Set the generator output to 0 V.
b. Then disconnect the cable from the generator output at the input
connector of the channel last tested.
Equipment Two dual-banana connectors (Item 7)
Required
One BNC T connector (Item 8)
One DC calibration generator (Item 10)
Two precision coaxial cables (Item 5)
Prerequisites See page 1- - 15.
TDS 420A, TDS 430A & TDS 460A Performance Verification and Specifications
Generator
Offset Setting Setting
+1 V +1 V
+10 V +10 V
+99.9 V +99.9 V
Offset
Accuracy Limits
±5 mV
±65 mV
±649.5 mV