Performance Ve rification
7. Set the leveled
sine wave generator frequency to:
50 MHz if you a re checking a TDS2001C
70 MHz if you are checking a TDS2002C, or TDS2004C
100 MHz if you are checking a TDS2012C, TDS2014C, TDS2022C, or
TDS2024C
8. Set the oscilloscope Horizontal Scale (seconds/division) to 5ns/div.
9. Push Set To 50%. Adjust Trigger Level as necessary and then check that
triggering is stable.
10. For TDS2022C and TDS2024C models, set the sine wave generator output
level for a channel 1 display to approximately 350 mV
p-p
.
11. For TDS2022C and TDS2024C models, set the sine wave generator frequency
to 200 MHz.
12. Set the oscilloscope Horizontal Scale (seconds/division) to 2.5 ns/div .
13. Push Set To 50%. Adjust Trigger Level as necessary and then check that
triggering is stable.
14. Change the oscilloscope setup using the following table:
Push m enu button Select menu option Select setting
Trig Menu
Slope
Falling
15. Pus
h Set To 50%. Adjust Trigger Level as necessary and then check that
triggering is stable.
16. Dis
connect the test setup.
Check Vertical Position
Accuracy
The results of this test and the DC Gain Accuracy test together define the DC
Measurement Accuracy of the oscilloscope. The DC Measurement Accuracy
s
pecification encompasses two different ranges of operation over two different
attenuator settings.
DC Gain Accuracy: Identifies errors, mostly from the A/D converter,
when the vertical position (known as offset in these oscilloscopes) is set to
0 divisions (or a grounded input will show screen center)
Vertical Position Accuracy: Identifies errors, mostly from the position control,
made when the vertical position is set to a non-zero value
The two attenuator settings operate identically, so verification of the attenuation
range from -1.8 V to 1.8 V also verifies the attenuation range of -45 V to 45 V.
4–10 TDS2000C Series Oscilloscope Service Manual
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