Tektronix TDS2004C - Page 128

Appendix A: Example of a Vertical Position Accuracy Test Spreadsheet
Table A-1: Vertical position accuracy test spreadsheet (cont.)
AB C DEFGHI
5
1.88 0.000
‡‡‡
Offset in
volts
0.005
6 1.84 0.000
‡‡‡
Total
voltage
offset
0.01=I2*I4+I5
7
1.80 1.80 1.79 0.010 -0.028 0.028 0.018
8 1.76 1.76 1.75 0.010 -0.0276 0.0276 0.018
Gain
error
1%
9 1.72 1.72 1.72 0.000 -0.0272 0.0272 0.027
10 1.68 1.68 1.68 0.000 -0.0268 0.0268 0.027 Equation
for cell
D7
=B7-C7
11 1.64 1.64 1.64 0.000 -0.0264 0.0264 0.026 Equation
for cell
E7
=-F7
12 1.60 1.6 1.6 0.000 -0.026 0.026 0.026 Equation
for cell
F7
=(ABS(B7)*$I$8
+$I$6)
13 1.56 1.56 1.56 0.000 -0.0256 0.0256 0.026
14 1.52 1.52 1.52 0.000 -0.0252 0.0252 0.025 Equation
for cell
G7
=MIN
(D7-E7,F7-D7)
15 1.48 1.48 1.49 -0.010 -0.0248 0.0248 0.015
16 1.44 1.44 1.45 -0.010 -0.0244 0.0244 0.014 Minimum
margin
0.007=MIN
(G7:G97)
17 1.40 1.4 1.41 -0.010 -0.024 0.024 0.014
18 1.36 1.36 1.37 -0.010 -0.0236 0.0236 0.014
19 1.32 1.32 1.33 -0.010 -0.0232 0.0232 0.013
20 1.28 1.28 1.29 -0.010 -0.0228 0.0228 0.013
21 1.24 1.24 1.25 -0.010 -0.0224 0.0224 0.012
22 1.20 1.2 1.21 -0.010 -0.022 0.022 0.012
23 1.16 1.16 1.17 -0.010 -0.0216 0.0216 0.012
24 1.12 1.12 1.13 -0.010 -0.0212 0.0212 0.011
25 1.08 1.08 1.09 -0.010 -0.0208 0.0208 0.011
26 1.04 1.04 1.05 -0.010 -0.0204 0.0204 0.010
27 1.00 1 1.01 -0.010 -0.02 0.02 0.010
28 0.96 0.96 0.966 -0.006 -0.0196 0.0196 0.014
29 0.92 0.92 0.926 -0.006 -0.0192 0.0192 0.013
30 0.88 0.88 0.886 -0.006 -0.0188 0.0188 0.013
31 0.84 0.84 0.845 -0.005 -0.0184 0.0184 0.013
A-2 TDS2000C Series Oscilloscope Service Manual