Pulse Response - HP 54501A Service Manual

21 . AUTOSCALE and set channel 3 vertical sensitivity to 200 mV/div .
22. Adjust System Board Assembly C102 for flat top and baseline on displayed signal.
23.
Connect Square Wave Generator to Channel 4.
24. AUTOSCALE and set channel 4
vertical sensitivity to 200 mV/div .
25. Adjust System Board Assembly C5 for flat top and baseline on displayed signal .
26.
Change Square Wave Generator output for approximately 5 Vp-p output .
27.
AUTOSCALE and set channel 4 vertical sensitivity to 2 V/div .
28.
Adjust System Board Assembly C2 for flat top and baseline on displayed signal .
29.
Connect Square Wave Generator output to Channel 1 . AUTOSCALE .
30 .
AUTOSCALE and set channel 1 vertical sensitivity to 2 V/div .
31 .
Adjust System Board Assembly C302 for flat top and baseline on displayed signal .
4-16. Pulse Response Adjustments
Equipment Required:
Pulse Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Tektronix 284
50 Ohm Termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HP 101000
Procedure :
4.
Press TIMEBASE and set for 5 nsec/div .
HP 54501A ADJUSTMENTS
1 .
Connect Pulse Generator to HP 54501A Channel 1 input using 50-ohm termination .
2.
Set Pulse Generator for output amplitude of 200 mV .
3 . AUTOSCALE .
5.
Adjust System Board Assembly C337 and R391 for a leading edge overshoot of not more
than 4% .
6.
Repeat same procedure on Channels 2, 3, and 4 adjusting System Board Assembly C237 and
R291, C137 and R191, and C37 and R91 respectively .