Tektronix 2247A

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Performance Check Procedure
k. Set calibration generator to Std Ampl output, 2 V.
1. CHECK—the signal amplitude Is between 3.92 and 4.08 divisions.
m. Set:
Vertical MODE CH 3 (CH 4 off)
CH 3 VOLTS/DIV 0.5V
n. Move the test signal to the CH 3 Input.
o. Repeat CHECK for CH 3.
p. Disconnect the test setup from the 2247A.
11. ADD Mode and CH 2 INVERT Deflection
Accuracy
a. Set:
Vertical MODE ADD (all others
off)
CH 1 and CH 2 VOLTS/DIV 0.1V
CH 1 and CH 2 Input
COUPLING bc
b. Connect callbration generator Std Ampl output to the CH 1 and CH 2
Inputs via 50 Q precision BNC coaxlal cable and a BNC dual-input
coupler.
c. Set the callbration generator to Std Ampl output, 0.2 V.
d. Position the ADD signal to the center of the crt graticule with the CH 1
and CH 2 POSITION controls.
e. CHECK—that the ADD signal amplitude is between 3.92 and 4.08
divisions.
f. Set CH 2 INVERT On.
g. CHECK—the ADD signal amplitude Is 0.08 division (less than half a
minor graticule division) or less excluding trace width (sweep will free
run).
h. Disconnect the test setup from the 2247A.
2247A Operators 7-17