Tektronix 2221A - Appendix C: Performance Verification; External Z-Axis, Probe Adjust, External Clock, and X-Y Plotter Checks; Step 1: Check External Z-Axis Operation

Appendix C: Performance Verification
External Z-Axis, Probe Adjust, External Clock, and X-Y Plotter
Checks
Equipment Required (see Table A-26):
Leveled Sine Wave Generator
Two 50 Q BNC Cables
BNC T-Connector
50 Q BNC Termination
Pulse Generator
BNC male-to-tip plug
Digital Voltmeter
10X Probe (provided with instrument)
initial Control Settings:
Vertical (Both Channels)
CH 1 POSITION
Midrange
MODE
CH 1
X-Y
Off (button out)
BW Li MIT
Off (button out)
CH 1 VOLTS/DIV
1 V
CH 1 VOLTS/DIV Variable
CAL detent
CH 1 AC-GND-DC
DC
Horizontal
POSITION
Midrange
SEC/DIV
20 gs
SEC/DIV Variable
CAL detent
XI0 Magnifier
Off (knob in)
Trigger
VAR HOLDOFF
NORM
Mode
P-P AUTO
SLOPE
Positive
(button out)
LEVEL
Midrange
SOURCE
Vertical MODE
COUPL
NORM
EXT COUPL
AC
Storage
STORE/NON-STORE
NON-STORE
(button out)
Procedure Steps:
("I Stepl: Check External Z-Axis Operation
a. Connect the leveled sine wave generator output via a 50 O cable
and a T-connector to the CH 1 OR X input connector Then connect
a 50 Q cable and a 50 Q termination from the T-connector to the EXT
Z-AXIS INPUT connector on the rear panel.
b. Set the generator to produce a 5 V, 50 kHz signal.
c. CHECK — For noticeable intensity modulation. The positive part of
the sine wave should be of lower intensity than the negative part.
2221A User Manual A-49