Low-Frequency Linearity; Low Frequency L In E A Rity - Tektronix 2245A Operator's Manual

Performance Check Procedure
c. Set:
CH 1 VOLTS/DIV
CH 1 VAR VOLTS/DIV
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
Vertical MODE
CH 2 VOLTS/DIV
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 VOLTS/DIV
SCOPE BW
b. 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
10 mV
Fully CCW
Detent (calibrated)
CH 2 (CH 1 off)
10 mV
CH 1 (CH 2 off)
10 mV
ON
2245A Operators