Adjustment Procedure—2230 Service
22. Check Store Mode Cross Talk
a. Set:
23. Check Store Pulse Width Amplitude
a. Set:
VERTICAL MODE
Channel 1 AC-GND-DC
Channel 2 AC-GND-DC
VOLTS/DIV (both)
A SEC/DIV
STORE/NON STORE
BOTH and CHOP
GND
AC
0.1 V
10 ns
STORE (button in)
AC-GND-DC (both)
VERTICAL MODE
SEC/DIV
STORE/NON STORE
ROLL/SCAN
1K/4K
DC
CH2
1 ms
NON STORE (button out)
SCAN (button out)
1K (button in)
b. Connect the Pulse Generator pulse-period output via
a 50 Q cable and a 50 0 termination to CH 2 OR Y input
connector.
b. Set the generator to produce a 1 ms period, 100 ns
duration, 5-division display.
c. Set the generator to produce a 100 kHz, 5-division
display.
c. Set the STORE/NON STORE switch to STORE (but
ton in).
d. Use the Channel 2 POSITION control to center the
display.
d. CHECK—The amplitude of the display is 2.5 divi
sions or greater.
e. Set CH 2 VOLTS/DIV switch to 50 mV for a 10-
division display.
f. CHECK—Display amplitude on Channel 1 is less
than 1% (0.1 division).
g. Set the A SEC/DIV switch to 10 ms.
h. CHECK—Display amplitude on Channel 1 is less
than 1% (0.1 division).
i. Move the cable from the CH 2 OR Y input connector
to the CH 1 OR X input connector.
j. Set:
CH 2 VOLTS/DIV 0.1 V
Channel 1 AC-GND-DC AC
Channel 2 AC-GND-DC GND
k. Use the Channel 1 POSITION control to center the
display.
I. Set the CH 1 VOLTS/DIV switch to 50 mV for a 10-
division display.
m. Repeat parts f through h for Channel 2.
e. Set the A SEC/DIV switch to 0.1 sec.
f. CHECK—The amplitude of the display is 2.5 divi
sions or greater.
g. Set ROLL/SCAN switch to ROLL (button in).
h. CHECK—The amplitude of the display is 2.5 divi
sions or greater.
i. Set:
VERTICAL MODE BOTH and CHOP
A SEC/DIV 1 ms
STORE/NON STORE NON STORE (button out)
ROLL/SCAN SCAN (button out)
j. Set the generator to produce a 0.1 s period, 2 ms
duration, 5-division display.
k. Repeat parts c through h.
I. Set:
A SEC/DIV 1 ms
STORE/NON STORE NON STORE (button out)
ROLL/SCAN SCAN (button out)
5-15
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