Tektronix MSO2012 Technical Reference

Performance Verification
8. Push the side-b
ezel D7 - D0 button.
Before you change the threshold value, push the Fine front-panel button to
turn off the fin
e adjustment and make adjusting the value quicker.
9. Use Multipurpose knob a to set the D7-D0 threshold level to 0V.
10. Use Multipurpose knob b to set the D15-D8 threshold level to 0V.
The thresholds are now set for the 0 V threshold check, shown in steps 11
through 18.
11. Push the front-panel Trigger Menu button.
12. Push the Source lower-bezel button, and turn Multipurpose knob a to select
the appropriate channel, such as D0.
By default, the Type is set to Edge, Coupling is set to DC, Slope is set to
Rising, Mode is set to Auto, and Level is set to match the threshold of the
channel being tested.
13. Set the DC voltage source (Vs) to -400 mV. Wait 1 second. Check the logic
level of the corresponding digital channel in the display.
If the channel is a static logic level high, change the DC voltage source Vs
to -500 mV.
14. Increment Vs by +10 mV. Wait 1 second and check the logic level of the
corresponding digital channel in the display. If the channel is at a static logic
level high, record the Vs value as V
s-
in the 0 V row of the test record.
If the channel is a logic level low or is alternating between high and low,
repeat this step (increment Vs by 10 mV, wait 1 second, and check for a static
lo
gic high) until a value for V
s-
is found.
15. Push the Slope lower-bezel button to change the slope to Falling.
16. Set the DC voltage source (Vs) to +400 mV. Wait 1 second. Check the logic
level of the corresponding digital channel in the display.
If the channel is a static logic level low, change the DC voltage source Vs
to +500 mV.
17. Decrement Vs by -10 mV. Wait 1 second 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 V
s+
in the 0 V row of the test record.
If the channel is a logic level high or is alternating between high and low,
repeat this step (decrement Vs by 10 mV, wait 1 second, and check for a static
logic low) until a value for V
s+
is found.
18. Find the average, V
sAvg
=(V
s-
+V
s+
)/2. Record the average as the test result
in the test record.
DPO2000 and MSO2000 Series Specifications and Performance Verification 27

Tektronix MSO2012 Specifications

General

Brand	Tektronix
Model	MSO2012
Category	Test Equipment
Language	English