Tektronix 2221A - Appendix C: Performance Verification; Step 1: Check Deflection Accuracy and Variable Range

Appendix C: Performance Verification
50 0 BNC Cable 10X Attenuator
initial Control Settings:
Vertical (Both Channels)
POSITION
Midrange
MODE
CH 1
X-Y
Off (button out)
BW LIMIT
On (button in)
VOLTS/DIV
2 mV
VOLTS/DIV Variable
CAL (detent)
INVERT
Off (button out)
AC-GND-DC
DC
Horizontal
POSITION
Midrange
SEC/DIV
0.5 ms
SEC/DIV Variable
CAL detent
X I0 Magnifier
Off (knob in)
Trigger
VAR HOLDOFF
NORM
Mode
P-P AUTO
SLOPE
Positive (button out)
LEVEL
Midrange
SOURCE
Vertical MODE
COUPL
NORM
Storage
STORE/NON-STORE
NON-STORE (button
out)
Procedure Steps;
P I Step 1: Check Deflection Accuracy and Variable Range
a. Connect the standard-amplitude signal from the calibration genera
tor via a 50 Q cable to the CH 1 OR X input connector.
b. CHECK — Deflection accuracy is within the limits given in Table A-8
for each CH 1 VOLTS/DiV switch setting and corresponding stan
dard-amplitude signal.
When at the 20 mV VOLTS/DIV switch setting, rotate the CH 1
VOLTS/DSV Variable control fully counterclockwise and CHECK that
the display decreases to 2 divisions or less. Then return the CH 1
VOLTS/DIV Variable control to the CAL detent and continue with the
50 mV check.
2221A User Manual
A-29