Deflection Accuracy Limits - Tektronix 2236 Instruction Manual

ad. ADJUST—Ch 1 Input Standardizer (C l) for the same
display reading as that noted in part ab.
ae. Set the CH 1 VOLTS/DIV switch to 0.1 V and in­
crease the calibrator output voltage to 8 V.
af. ADJUST—Ch 1 10X Input C (Cl 1) for a display read­
ing 10 times greater than that noted in part ab.
ag. Set the CH 1 VOLTS/DIV switch to 1 V and increase
the calibrator output voltage to 80 V.
ah. ADJUST—Ch 1 100X Input C (C4) for a display read­
ing 100 times greater than that noted in part ab.
ai. Disconnect the test equipment from the instruments.
7. Adjust Vertical Gain (R145, R195, R76, and R26)
a. Set:
VOLTS/DIV (both)
Input Coupling (both)
b. Connect a 50-mV standard-amplitude signal via a 50-0
cable to the CH 1 OR X input connector.
c. ADJUST— Ch 1 Gain (R145) for an exact 5-division
display.
d. Move the cable from the CH 1 OR X input connector to
the CH 2 OR Y input connector. Set the VERTICAL MODE
switch to CH 2.
e. ADJUST—Ch 2 Gain (R195) for an exact 5-division
display.
f. Change the generator output to 10 mV and set both
VOLTS/DIV switches to 2 mV.
g. ADJUST—Ch 2 2-mV Gain (R76) for an exact 5-divi­
sion display.
h. Move the cable from the CH 2 OR Y input connector to
the CH 1 OR X input connector. Set the VERTICAL MODE
switch to CH 1.
i. ADJUST—Ch 1 2-mV Gain (R26) for an exact 5-divi­
sion display.
REV JAN 1985
10 mV
DC
Adjustment Procedure— 2236 Service
j. Set both Input Coupling switches to GND.
k. CHECK— That no trace shift occurs when switching
between the 5 mV and 2 mV positions of the CH 1
VOLTS/DIV switch. If trace shift is observed, repeat Step 2
of this procedure.
I. Set the VERTICAL MODE switch to CH 2.
m. CHECK—That no trace shift occurs when switching
between the 5 mV and 2 mv positions of the CH 2
VOLTS/DIV switch. If trace shift is observed, repeat Step 2
of this procedure.
8. Check Deflection Accuracy and Variable Range
a. Set:
VERTICAL MODE
Input Coupling (both)
b. CHECK— Deflection accuracy is within the limits given
in Table 5-3 for each CH 1 VOLTS/DIV switch setting and
corresponding standard-amplitude signal. When at the 20-
mV VOLTS/DIV switch setting, rotate the CH 1 VOLTS/DIV
Variable control fully counterclockwise and CHECK that the
display decreases to 2 divisions or less. Then return the CH
1 VOLTS/DIV Variable control to the CAL detent and con­
tinue with the 50-mV check.
Table 5-3

Deflection Accuracy Limits

VOLTS/DIV Standard
Switch Amplitude Deflection
Signal
Setting (Divisions)
10 mV
2 mV
5 mV 20 mV
10 mV 50 mV
0.1 V
20 mV
0.2 V
50 mV
0.1 V 0.5 V
0.2 V 1 V
2 V
0.5 V
1 V 5 V
2 V 10 V
5 V 20 V
CH 1
DC
Vertical Accuracy
Limits
(Divisions)
5 4.90 to 5.10
4 3.92 to 4.08
5 4.90 to 5.10
5 4.90 to 5.10
4 3.92 to 4.08
5 4.90 to 5.10
5 4.90 to 5.10
4 3.92 to 4.08
5 4.90 to 5.10
5 4.90 to 5.10
4 3.92 to 4.08
5-9