Tektronix 2221A - Appendix C: Performance Verification; Step 11: Check Non-Store and Store Channel isolation

Appendix C: Performance Verification
k. Adjust the CH 1 or CH 2 VOLTS/DIV Variable control for minimum
display amplitude.
i. Set the Vertical MODE switch to CH 2.
m. Set the generator to produce a 50 MHz, six division display.
n. Set the Vertical MODE switch to BOTH.
o. CHECK — Display amplitude is 0.6 division or less.
p. Disconnect the test equipment from the instrument
CD St©p1 1: Check Non-Store and Store Channel isolation
a. Set:
Vertical MODE
CH 1
VOLTS/DIV (both)
0.1 V
VOLTS/DIV Variable (both)
CAL detent
INVERT
Off (button out)
CH 1 AC-GND-DC
DC
CH 2 AC-GND-DC
GND
SEC/DIV
0.1 ps
b.
Connect the leveled sine wave generator output via a 50 O cable
and a 50 Q termination to the CH 1 OR X input connector.
c.
Set the generator to produce a 50 MHz, five division display.
d.
Set the Vertical MODE switch to CH 2.
!
e.
CHECK — Display amplitude is 0.05 division or less.
1
f.
Move the cabie from the CH 1 OR X input connector to the CH 2 OR
}
Y input connector.
[
g.
Set:
Vertical MODE
CH 1
i
i
CH 1 AC-GND-DC
GND
CH 2 AC-GND-DC DC
t
h.
CHECK — Display amplitude is 0,05 division or less.
\
i.
Set:
CH 2 VOLTS/DIV
50 mV
i
STORE/NON-STORE
STORE (button in)
SAVE/CONT
CONT
t
i-
CHECK — Display amplitude is 0.1 division or less.
f
k.
Move the cabie from the CH 2 OR Y input connector to the CH 1 OR
X input connector.
i
I.
I. Set;
Vertical MODE
CH 2
1
CH 1 VOLTS/DIV
50 mV
I
CH 2 VOLTS/DIV
0.1 V
CH 1 AC-GND-DC
DC
i
CH 2 AC-GND-DC GND
i
f
i
i
A-36
Appendices