CFG253 Performance Verification & Adjustment Procedures
Page 17 of 19 Procedure #: CP1005 Revision: A
c. Set the Distortion Analyzer INPUT RANGE to Auto Range and the FUNCTION
settings to Volts, Auto Range and THD+N.
d. Adjust R43 and R46 for a minimum distortion reading on the Distortion
Analyzer. Repeat the two adjustments as necessary to obtain the optimum
results.
e. Disconnect the cable from the Distortion Analyzer.
*** Alternate Procedure ***
( If Distortion Analyzer is not available )
f. Test Scope Set-Up:
Volts/Div 2V
Time/Div 1 uSec
g. Connect MAIN OUTPUT to test scope vertical input via coax cable and 50 ohm
terminator.
h. Adjust R46 for minimum distortion at top of sinewave and R43 for minimum
distortion at the bottom.
7. FREQUENCY DIAL ACCURACY
a. Set-Up:
AMPLITUDE CW
RANGE 1K
FUNCTION Triangle
VOLTS OUT Button In
FREQ/10 Button Out
FREQ DIAL 3.0
b. Connect the MAIN OUTPUT to the input of a Frequency Counter.
NOTE:
If a Frequency Counter is not a available, see
alternate procedure on next page.
c. Adjust R6 for a reading of 3.0 KHz on the Frequency Counter.
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