Ch 3 And Ch 4 Volts/Div Trace Shift; Ch 3 And Ch 4 Volts/Div Trace S H Ift; Ch 1 And Ch 2 Var Volts/Div Trace Shift; Ch 1 And Ch 2 Input Coupling Trace Shift - Tektronix 2246 1Y Service Manual

h. Switch CH 2 VOLTS/DIV through all positions
from 2 mV to 5 V.
i. CHECK—trace shift does not exceed 0.2 division
between steps.

3. CH 3 and CH 4 VOLTS/DIV Trace Shift

a. Set Vertical MODE to CH 3 (CH 2 off).
b. Position trace to the center horizontal graticule
line.
c. Switch CH 3 VOLTS/DIV between 0 1 V and
0.5 V.
d. CHECK—trace shift
division.
e. Set Vertical MODE to CH 4 (CH 3 off).
f. Position trace to the center horizontal graticule
line,
g. Switch CH 4 VOLTS/DIV between 0.1 V and
0.5 V.
h. CHECK—trace shift
division.

4. CH 1 and CH 2 VAR VOLTS/DIV Trace Shift

a. Set:
Vertical MODE
CH 1 VOLTS/DIV
b. Position trace to center graticule line.
c. Set CH 1 VAR VOLTS/DIV fully CCW.
d. CHECK—trace shift
division.
e. Set:
CH 1 VAR VOLTS/DIV
Vertical MODE
CH 2 VOLTS/DIV
f. Position trace to center graticule line.
g. Set CH 2 VAR VOLTS/DIV fully CCW.
h. CHECK-trace shift
division.
i. Set CH 2 VAR VOLTS/DIV to detent (calibrated)
position.
Perform ance Check Procedure—2246 1Y and 2246 Mod A Service
does not exceed one
does not exceed one
CH 1 (CH 4 off)
2 mV
does not exceed one
Detent
(calibrated)
CH 2 (CH 1 off)
2 mV
does not exceed one

5. CH 1 and CH 2 Input COUPLING Trace Shift

a. Position trace to center graticule line.
b. Set CH 2 Input COUPLING to DC.
c. CHECK—trace shift
division.
d. Set:
Vertical MODE
CH 1 Input COUPLING
e. Position trace to center graticule line.
f. Set CH 1 Input COUPLING to DC.
g. CHECK-trace shift
division.

6. CH 2 INVERT Trace Shift

a. Set:
Vertical MODE to CH 2
CH 2 Input Coupling
b. Position trace to center horizontal graticule line.
c. Set CH 2 INVERT On.
d. CHECK-trace shift
division.
e. Set:
CH 2 INVERT
CH 2 COUPLING

7. CH 1 and CH 2 VAR VOLTS/DIV Range

a. Set Vertical MODE to CH 1.
b. Position CH 1 trace to the center horizontal
graticule line,
c. Connect calibration generator (PG 506) STD
AMPL output to the CH 1 input via 50 G precision
BNC coaxial cable. Set calibration generator to
STD AMPL and AMPLITUDE to 50 mV.
d. Set:
CH 1 VOLTS/DIV
CH 1 VAR VOLTS/DIV
e. CHECK—the signal amplitude is two divisions or
less.
does not exceed 0.25
CH 1 (CH 2
off)
GND
does not exceed 0.25
(CH 1 off)
GND
does not exceed one
Off
DC
10 mV
Fully CCW
4-7