Performance Check Procedure
l. Move sine-wave generator signal to the CH 4 Input.
m. Set:
CH 1, CH 2, and CH 3
VERTICAL MODE On (CH 4 off)
TRIGGER SOURCE CH 4
n. CHECK—display amplitude Is 0.1 division or less, excluding trace
width, on the CH 1, CH 2, and CH 3 traces.
o. Disconnect the test setup.
21. AC-Coupled Lower -3 dB Point
a. Set:
A SEC/DIV
VERTICAL MODE
TRIGGER SOURCE
TRIGGER MODE
10 ms
CH 1 (all others off)
VERT
NORM
b. Connect function generator (FG 502) output to the CH 1 input via a
50 f l BNC coaxial cable and a 50 f l BNC termination.
c. Set the function generator output controls to produce a six-division
sine-wave display at 10 Hz (with no dc offset).
d. Set CH 1 Input COUPLING to AC.
e. CHECK—display amplitude is 4.2 divisions or more.
f. Set VERTICAL MODE to CH 2 (CH 1 off).
g. Repeat the procedure for CH 2.
h. Disconnect the test equipment from the 2245A.
2245A Operators
7-25
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