CFG253 Performance Verification & Adjustment Procedures
Page 3 of 19 Procedure #: CP1005 Revision: A
PREPARATION
Connect the instrument and test equipment to an appropriate power source and allow 20
minutes for warm up and stabilization. Set the controls as listed below during warm up.
Initial CFG253 Set-Up:
AMPLITUDE Mid Range
DC OFFSET Pushed In
SYMMETRY Midrange Detent
RANGE 1K
FUNCTION All Buttons Out
VOLTS OUT Button Out
FREQ/10 Button Out
SWEEP Button Out
SWEEP RATE Midrange
SWEEP WIDTH Midrange
FREQ DIAL 0.3
1. CHECK DC Offset
a. Pull out the DC OFFSET knob.
b. Test Scope Set-Up:
Volts/Div 2V
Time/Div 0.2 mSec
c. Connect MAIN OUTPUT to test scope vertical input via coax cable and 50 ohm
terminator.
d. Set test scope Vert Coupling to GROUND, center the trace, then set Coupling
back to DC.
e. While turning the DC OFFSET knob from CCW to CW and back, check for for >
+5 V with DC OFFSET knob CW and > -5 V with the knob CCW (+/- 2.5 Div on
test scope).
f. Push the DC OFFSET knob in (off).
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