HP 8114A - Preshoot

1) Overshoot and Ringing
3. Set the digitizing oscilloscope HP 54121T:
n Press (KKZZiK)
n Select the Display menu and set, the Number of Averages to 32
n Select the Channel menu and set the Attenuation factor to 100
n Center one pulse horizontally and vertically on screen (e.g.
TIME/DIV = 100 ns/div, DELAY = 800 ns)
H Select the delta V menu and turn the voltage markers On
H Set the VARIABLE LEVELS = 95% - 105% and press
@JTO LEVEL SET]
n Select the channel menu and center vertically the top pulse
(offset = 25 V)
n Set the VOLTSDIV = 1 V/div
n Select the Timebase menu and set TIMEiDIV = 20 ns/div,
DELAY = 30 ns
4. Check that Overshoot and Ringing are within the f5% of
amplitude lt50 mV window (within the two marker positions)
5. Enter the result in the Test Report as TR entry 9 I
Note
1
Q
lake the oscilloscope’s trace flatness error (GaAs input circuit) into
account.
6. Set HP 8114A to: Amplitude = 5 V
7. Repeat steps 3 to 5, but this time set the Scope to:
w VARIABLE LEVELS = 94% - 106% and press [AUTO LEVEL SET]
n OFFSET = 5 V
m VOLTSDIV = 200 mV/Div
m TIMEBASE = 20 ns/Div
8. Enter the result in the Test Report as TR entry 9 - 2
2) Preshoot
9. Set HP 8114A to:
l Period = 1 ps
l Amplitude = 5 V,
m Baseline = 0 V
n Delay = 50 ns
10. Set the digitizing oscilloscope, HP 54121T:
l Press (iii]
l Select the Display menu and set the Number of Averages to 32
l Select the Channel menu and set the Attenuation factor to 100
n Center one pulse horizontally and vertically on screen (e.g.
TIME/DIV = 100 ns/div, DELAY = 800 ns)
n Select the delta V menu and turn the voltage markers On
n Set the VARIABLE LEVELS = -6% to +6% and press
(AUTO LEVEL SET)
n Select the channel menu and center vertically the bottom of the
pulse (offset = 0 V)
n Set the VOLTSDIV = 200 mV/div
m Select the Timebase menu and set TIME/DIV = 20 ns/div
3.42 Testing the HP 8114A