Ch 2 Input Capacitance (Cl 24); Ch 2 Input Capacitance ( C L2 4 ); Ch 2 Input Compensation X I 0 (C21); Ch 2 Input Compensation X I 00 (C 2 0 ) - Tektronix 2246 1Y Service Manual

c. Set calibration generator for HIGH AMPL. Set Period
to 10 kHz and adjust Pulse Amplitude for 5-division
display.
d. ADJUST-R23 (CH 2 MF/LF GAIN) and C2 (CH 2
MF/LF COMP) for flattest response (within 0.25 divi­
sion).
12. CH 2 Input C ap acitance (C l 24)
a. Set:
CH 2 VOLTS/DIV
SEC/DIV
b. Add precision normalizer between termination and
CH 2 input connector. Set calibration generator Pe­
riod to 1 kHz and adjust Pulse Amplitude for 5-divi­
sion display.
c. ADJUST —C124 (CH 1 INPUT CAPACITANCE) for
best flat top.
d. Remove precision normalizer from the input cable.
13. CH 2 Input C om pensation X I 0 (C 2 1)
a. Set:
CH 2 VOLTS/DIV
SEC/DIV
b. Set calibration generator Period to 10 kHz and adjust
Pulse amplitude for a 5-division display.
c. ADJUST-C21 (CH 2 INPUT COMP X10) for flattest
response (within 0.25 division).
14. CH 2 Input C om pensation X I 00 (C 2 0)
a. Set CH 2 VOLTS/DIV to 1 V.
b. ADJUST—C20 (CH 2 INPUT COMP X100) for flattest
response (within 0.25 division).
15. CH 2 Gain (R 221)
a. Set calibration generator to STD AMPL and Ampli­
tude to 50 mV. Remove 50 f l termination from the in­
put cable.
b. Set:
CH 2 VOLTS/DIV
SEC/DIV
REV JUN 1991
A djustm ent P ro c e d u re - 2 2 4 6 1Y and 224 6 M O D A Service
c.
16. CH 3 M F /L F C o m pensation ( C l 34)
a.
b.
10 mV
0.2 ms
c.
d.
17. CH 3 Gain (R 231)
a.
b.
0.1V
c.
50 ns
18. CH 4 M F /L F C om pensation ( C l 54)
a.
b.
c.
d.
19. CH 4 Gain (R 241)
a.
10 mV
0.2 ms
ADJUST- CH 2 GAIN (R221) for exactly a 5-division
display amplitude.
Set:
Vertical MODE
CH 3 VOLTS/DIV
SEC/DIV
Move calibration generator signal to CH 3 input. Add
50 f l termination.
Set calibration generator for HIGH AMPL. Set Period
to 10 kHz and adjust Pulse Amplitude for a 5-divi­
sion display.
A D J U S T -C l34 (CH 3 MF/LF COMP) for flattest re­
sponse.
Set:
CH 3 VOLTS/DIV
SEC/DIV
Set calibration generator for STD AMPL. Set ampli­
tude to 2 V. Remove 50 f l termination.
ADJUST—CH 3 GAIN (R231) for exactly 4-division
display amplitude.
SET:
Vertical MODE
CH 4 VOLTS/DIV
SEC/DIV
Move calibration generator signal to CH 4 input. Add
50 f l termination.
Set calibration generator for HIGH AMPL. Set Period
to 10 kHz and adjust Pulse Amplitude for a 5-divi­
sion display.
ADJUST- C l 54 (CH 4 MF/LF COMP) for flattest re­
sponse.
Set:
CH 4 VOLTS/DIV
SEC/DIV
CH 3
0.1V
50 (j.s
0.5 V
2 ms
CH 4 (CH 3 off)
0.1V
50 fis
0.5 V
0.2 ms
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