Performance Check Procedure
m. Set CH 2 POSITION to 12 o'clock.
n.
Move the BNC dual-input coupler from the CH 1 and CH 2 inputs to the
CH 3 and CH 4 inputs.
o.
Set:
VERTICAL MODE
CH 3 (CH 2 off)
CH 3 and CH 4
VOLTS/DIV
0.1 V
CH 3 POSITION
Fully CW
p.
CHECK—that the bottom of the waveform is at least one division above
the center graticule line.
q.
Set CH 3 POSITION fully CCW.
r.
CHECK—that the top of the waveform is at least one division below the
center graticule line.
s.
Set:
CH 3 POSITION
VERTICAL MODE
t.
Repeat the procedure for CH 4.
u.
Set CH 4 POSITION to 12 o'clock.
v.
Disconnect the test setup from the 2245A.
12 o ’ clock
CH 4 (CH 3 off)
13. CH 1 to CH 2 Signal Delay Match
a.
Set:
VERTICAL MODE
CH 1 and CH 2
Input COUPLING
CH 1 and CH 2
VOLTS/DIV
SEC/DIV
TRIGGER SOURCE
CH 1 and CH 2 (CH 4 off)
DC
0.1 V
20 ns
CH 3
b.
Superimpose the CH 1 and CH 2 traces at the 100% graticule marking.
224SA Operators
7-19
