Tektronix 2230 Service Manual

Adjustment Procedure—2230 Service
l. CHECK—Display amplitude is 0.1 division or less.
m. Disconnect the test equipment from the instrument.
30. Check Common-Mode Rejection Ratio
a. Set:
VOLTS/DIV (both) 10 mV
INVERT On (button in)
AC-GND-DC (both) DC
STORE/NON STORE NON STORE (button out)
b. Connect the leveled sine-wave generator output via
a 50 £J cable, a 50 0 termination, and a dual-input coupler
to the CH 1 OR X and CH 2 OR Y input connectors.
c. Set the generator to produce a 50 MHz, 6-division
display.
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.
e. Set the VERTICAL MODE switches to BOTH and
ADD.
f. CHECK—Display amplitude is 0.6 division or less.
g. If the check in part f meets the requirement, skip to
part p. If it does not, continue with part h.
h. Set the VERTICAL MODE switch to CH 1.
i. Set the generator to produce a 50 kHz, 6-division
display.
j. Set the VERTICAL MODE switch to BOTH.
k. Adjust the CH 1 or CH 2 VOLTS/DIV Variable con
trol for minimum display amplitude.
I. Set the VERTICAL MODE switch to CH 1.
m. Set the generator to produce a 50 MHz, 6-division
display.
n. Set the VERTICAL MODE switch to BOTH.
o. CHECK—Display amplitude is 0.6 division or less.
p. Disconnect the test equipment from the instrument.
31. Check Probe Encoding
a. Set:
VOLTS/DIV (both) 0.1 V
VERTICAL MODE CH 1
b. Read the 0.1 V on the Channel 1 VOLTS/DIV por
tion of the crt readout.
c. Connect the standard accessory 10X probe to the
CH 1 OR X connector.
d. CHECK—The Channel 1 VOLTS/DIV portion of the
crt readout changes from 0.1 V to 1 V.
e. Set VERTICAL MODE to CH 2.
f. Move the 10X probe from the CH 1 OR X input con
nector to the CH 2 OR Y input connector.
g. CHECK—The Channel 2 VOLTS/DIV portion of the
crt readout changes from 100 mV to 1 V.
h. Disconnect the 10X probe from the instrument.
NOTE
To continue 'with the Adjustment Procedure, remove
the instrument cabinet and allow a 20-minute time
period to elapse before continuing with the Adjust
ment Procedure. See the “Cabinet" removal instruc
tions located in the "Maintenance" section of the
manual.
5-18

Tektronix 2230 Specifications

General

Brand	Tektronix
Model	2230
Category	Test Equipment
Language	English