Performance Check Procedure— 2230 Service
12. Check Common-Mode Rejection Ratio
a. Set:
p. Disconnect the test equipment from the instrument.
BW LIMIT Off (button out)
CH 2 VOLTS/DIV 10 mV
INVERT On (button in)
13. Check Non Store and Store Channel Isolation
a. Set:
b. Connect the leveled sine-wave generator output via
a 50 0 cable, a 50 Q termination, and a dual-input coupler
to the CH 1 OR X and the CH 2 OR Y input connectors.
VERTICAL MODE CH 1
VOLTS/DIV (both) 0.1 V
VOLTS/DIV Variable
(both) CAL detent
c. Set the generator to produce a 50 MHz, 6-division
display.
INVERT Off (button out)
Channel 1 AC-GND-DC AC
Channel 2 AC-GND-DC GND
A SEC/DIV 0.1 fts
d. Vertically center the display using the Channel 1
POSITION control. Then set the VERTICAL MODE switch
to CH 2 and vertically center the display using the Chan
nel 2 POSITION control.
b. Connect the leveled sine-wave generator output via
a 50 Q cable and a 50 Q termination to the CH 1 OR X
input connector.
e. Set the VERTICAL MODE switches to BOTH and
ADD.
c. Set the generator to produce a 50 MHz, 5-division
display.
f. CHECK—Display amplitude is 0.6 division or less.
d. Set the VERTICAL MODE switch to CH 2.
g. If the check in part f meets the requirement, skip to
part p. If it does not, continue with part h.
e. CHECK—Display amplitude is 0.05 division or less.
h. Set the VERTICAL MODE switch to CH 1.
f. Move the cable from the CH 1 OR X input connector
to the CH 2 OR Y input connector.
i. Set the generator to produce a 50 kHz, 6-division
display.
g. Set:
VERTICAL MODE CH 1
Channel 1 AC-GND-DC GND
j. Set the VERTICAL MODE switch to BOTH.
Channel 2 AC-GND-DC AC
k. Adjust the CH 1 or CH 2 VOLTS/DIV Variable con
trol for minimum display amplitude.
h. CHECK—Display amplitude is 0.05 division or less.
1. Set the VERTICAL MODE switch to CH 1.
i. Set:
CH 2 VOLTS/DIV 50 mV
m. Set the generator to produce a 50 MHz, 6-division
display.
STORE/NON STORE STORE (button in)
SAVE/CONTINUE CONTINUE (button out)
n. Set the VERTICAL MODE switch to BOTH.
j. CHECK—Display amplitude is 0.1 division or less.
o. CHECK—Display amplitude is 0.6 division or less.
k. Move the cable from the CH 2 OR Y input connector
to the CH 1 OR X input connector.
REV MAY 1987
4-9
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