Tektronix, Inc. DG2040, User Manual

Page: 236 / 266

Appendix B: Performance Verification
BĆ36
DG2040 Data Generator
Setup.
Set the oscilloscope as indicated below:
H
Oscilloscope
Displayed channel CH1 and CH2
Vertical axis 100 mV/div for CH1 and CH2 . . . . .
Horizontal axis 200 ns/div . . .
Record length 500 . . . .
Acquire mode Average 32 . . . .
Acquire sequence RUN/STOP button only .
Vertical offset –1 V . . . .
Trigger mode Norm . . . .
Trigger level –200 mV . . . . .
Trigger source CH2 . . . .
Trigger slope Rising Edge . . . . .
Trigger position 50 % . .
Trigger coupling DC . .
Display Vectors . . . . . . . . .
Input coupling DC . . . .
Input impedance 50
W
for CH1 and CH2 . .
Procedure.
Follow the steps below to verify the clock output amplitude accuracy:
1. Load the TP9PULSE.PDA test pattern file from the performance check
disk.
2. Press the following buttons to set the DG2040 Data Generator high and low
voltage levels.
Menubutton Bottom button Pop up menu Side button
Front panel
button
SETUP Level Condition
Move the cursor to CLK with the general purpose knob.
High -0.875
ENTER
Low -1.125
ENTER
3. Adjust the trigger level and vertical scale settings to get trace on the
oscilloscope. Perform the measurement under the low and high voltage
settings shown in Table B-7 and verify that the peak-to-peak amplitude for
each voltage setting is within the specified range.