Performance Check Procedure
c.
Set:
CH 1 VOLTS/DIV
10 mV
CH 1 VAR VOLTS/DIV
Fully CCW
d.
Connect calibration generator (PG 506) Std Ampl output to the CH 1
input via a 50 f l precision BNC coaxial cable. Set generator Std Ampl
output to 50 mV.
e.
CHECK—the signal amplitude is two divisions or less.
f.
Set:
CH 1 VAR VOLTS/DIV
Detent (calibrated)
Vertical MODE
CH 2 (CH 1 off)
CH 2 VOLTS/DIV
10 mV
g.
Position CH 2 trace to the center horizontal graticule line.
h.
Move the test signal to the CH 2 input.
i.
Set CH 2 VAR VOLTS/DIV fully CCW.
j.
Repeat the CHECK procedure for CH 2.
k.
Set CH 2 VAR VOLTS/DIV to detent (calibrated) position.
8.
Low-Frequency Linearity
a.
Set:
VERTICAL MODE
CH 1 (CH 2 off)
Set calibration generator to Std Ampl output, 20 mV.
c.
Move the test signal to the CH 1 input.
d.
Position the top of the signal to top graticule line.
e.
CHECK—the signal amplitude is between 1.9 and 2.1 divisions.
f.
Set bottom of the signal to bottom graticule line.
7-14
2245A Operators
