Tektronix MDO3000 Series Technical Reference

Performance Ver
ification
If the channel is a static logic level high (green), change the DC voltage source Vs to -500 mV.
12. Increment Vs by +20 mV. Wait 3 seconds and check the logic level of the corresponding digital channel in the display. If
the channel is
at a static logic level high (green), record the Vs value as in the 0 V row of the test record.
If the channel
is a logic level low (blue) or is alternating between high and low, repeat this step (increment Vs by 20 mV,
wait 3 seconds, and check for a static logic high). Continue until a value for Vs- is found.
NOTE. In this procedure, the channel might not change state until after you pass the set threshold level.
13. Push Slope o
n the lower menu to change the slope to Falling.
14. Set the DC vo
ltage source (V s) to +400 mV. Wait 3 seconds. Check the logic level of the corresponding digital channel in
the display.
If the channel is a static logic level low (blue), change the D C voltage source Vs to +500 mV.
15. Decrement Vs by -20 m V. Wait 3 seconds and check the logic level of the corresponding digital channel in the display. If
the channel is at a static logic level low, record the Vs value as Vs+ in the 0 V row of the test record.
If the channel is a logic level high (green) or is alternating between high and low, repeat this step (decrement Vs by
20 mV, wai
t 3 seconds, and check for a static logic low). Continue until a value for Vs+ is found.
16. Find the a
verage, V
sAvg
= (Vs- + Vs+)/2. Record the average as the test result in the test record.
Compare
the test r esult to the limits. If the result is between the limits, continue with the procedure to test the channel at
the +4 V threshold value.
17. The remaining part of this procedure is for the +4 V threshold test. Push D15-D0 on the front panel. The Thresholds
menu should display.
18. With the Fine button on the front panel turned off, turn Multipu rpo se knob “a” (for channels D7 - D0) or Multipurpose
knob “b
” (for channels D15 - D8) to set the threshold value to 4.00 V (+4.0 V/div). To remove the menu from the
display, push Menu Off on the front panel.
19. Set the DC voltage source (Vs) to +4.4 V. Wait 3 seconds. Check the logic level of the corresponding digital channel in
the display.
If the channel is a static logic level low (blue), change the DC voltage source Vs to +4.5 V.
20. Decrement Vs by -20 m V. Wait 3 seconds and check the logic level of the corresponding digital channel in the display. If
the ch
annel is at a static logic level low, record the Vs value as Vs+ in the 4 V row of the test record.
If th
e channel is a logic level high (green) or is alternating between high and low, repeat this step (decrement Vs by
20 mV, wait 3 seconds, and check for a static logic low). Continue until a value for Vs+ is found.
21. Push the Trigger Menu button on the front panel.
22. Push the Slope lower-bezel button to change the slope to Rising.
23. Set the DC voltage source (Vs) to +3.6 V. Wait 3 seconds. Check the logic level of the corresponding digital channel in
the display.
If the channel is a static logic level high (green), change the D C voltage source Vs to +3.5 V.
24. Increment Vs by +20 mV. Wait 3 seconds and check the logic level of the corresponding digital channel in the display. If
th
e channel is at a static logic level high, record the Vs value as in the 4 V row of the test record.
90 MDO3000 Series Specifications and Performance Verification

Tektronix MDO3000 Series Specifications

General

Brand	Tektronix
Model	MDO3000 Series
Category	Test Equipment
Language	English