Tektronix 067-0587-01 - Page 26

CALIBRATION PROCEDURE 067-0587-01
4-10
i. Remove the Stepping Circuit and replace transistor Q118. Remove
the Precision 50 2 Terminators from the Signal Pickoff device.
Preliminary Setup for Sampling.
a. Remove the Time Base Plug-in and move the Flexible Extender to
the Oscilloscope B horizontal compartment.
b. Insert the 7812 and 7811 sampling equipment into the oscilloscope
Left and Right vertical and A horizontal compartments. Insert the two (2)
S-2 sampling heads into the 7S11 and the vertical section of the 7512.
Insert the S-54 pulse generator head into the pulse generator section of
the 7812. Set the controls as follows:
Control Settings
7811
+UP / INVERT INVERT
Sensitivity 50 mV
VARIABLE CAL~IN
DCT RESPONSE SMOOTH
7812
Sensitivity 350 mV
VARIABLE CAL-IN
PRESET Off
HIGH RESOLUTION Off
SCAN. REP, set control as desired
TIME/ DIV X.1 0.1 ns