Cali bration-AA
501
INTERNAL ADJUSTMENT PROCEDURE
l
nfroduction
This procedure should be performed if the instrument
fails to meet the performance requirements of the elec-
trical characteristics listed in the Specification section of
this manual. To insurecontinued instrument accuracy it is
recommended that adjustment be performed every 1000
hours of operation or every six to twelve months
if
used
infrequently. Adjustment is also recommended following
instrument repair or modification. Adjustments must be
made at an ambient temperature of
+20°C to +30°C.
Services Available
If other test equipment is substituted, the calibration
setup may need to be altered to meet the requirements of
the equipment used.
Adjustment Access
Use an extender cable (Tektronix Part No. 067-0645-
02) to operate the plug-in outside the power module.
Remove t he top and both side covers oft he AA 501 to gain
access to the adjustments. All adjustments on the Input
board are accessed from the
topof theinstrument. See the
Adjustment Location illustration in the pullout pages at
the back of this manual.
Tektronix, Inc. provides complete instrument repair
and adjustment at
local field service centers and at the
1.
Adjust Amp Offset
factory service center. Contact your local Tektronix Field
Office or representative for further information.
a. Press the FUNCTION LEVEL and VOLTS
pushbut-
tons.
Test
Equipment Required
b. Set the INPUT LEVEL RANGE switch tothe200
pV
The test equipment (or equivalent) listed inTable4-1 is
position.
required for adjustment of the AA 501. Specifications
given for the test equipment are the minimum necessary
for accurate adjustment. All test equipment is assumed to
c.
Short the INPUT terminals with the dual banana
be correctly calibrated and operating within specification. shorting bar. See Fig. 4-14.
Shorting
bar
Fig.
4-14.
Adjustment test setup for steps 1 and
2.
scam
by
ARTEK
MEDL4
=a
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