3
,_-,
Appendix
B: Performancr:
Va’ificution
n
DC Gain Accuracy
Offset
Accuracy
Table B-2: DC accuracy
Vertical scale Position
Generator
setting
setting (divs) Offset settina settina Accuracv limits
1V
I +5
I +lOOV 1+98V 1+97-l
V to t98.9 V
200 mV
I +5
I*1ov I ea.4 v 1 t8.28
V to t8.52
V
50 mV
I -5
l-l v
I-IXV
I -581 mV to 419 mV
5mV
IO
l-l v
I -990 mV
I
-982 mV to -998 mV
12. Set the generator to the level and polarity indicated in Table B-2 for the
vertical scale, position, and of&t settings you have made. The DC test level
should appear on screen. (Ifit dots not rctum, the DC accuracy cheek has
failed for the present vertical scale setting of the current channel.)
13. Check that the readout for the measurement Mean readout on screen is
within the limiti listed For the present vertical scale and position/offsct/gcn-
erator settings.
1,4.
Repeat steps 7 through 13 until you have checked all the vertical scale
settings listed in Table B-2. Record the measurements for each of the 50 mV
settings.
15. Subtract the second 50 mV measurement from the first and compare the
result to the
“A at
50 mV” limits in Table B-2.
:16. Press WAVEFORM OFF;
then, press CH 2
17.
Set the generator output to 0 V.
18. Move the test hookup to the CH 2 input.
19. Repeat steps 5 through I5 for channel 2.
20. Set the generator output to 0 V,
2X. Disconnect the
cable
at the
CH
2 input connector.
DC gain accuracy is verified by successful completion of the
self tesI:s and the
DC voltage measurement accuracy (in the previous procedure).
Offset accuracy is verified by successful completion of the Self Tests and the DC
voltage measurement accuracy (in the previous proccdurc).
TDS 340, TDS 360 & ‘I’D.5 380 User Manual
B-7
i
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