CFG253 Performance Verification & Adjustment Procedures
Page 6 of 19 Procedure #: CP1005 Revision: A
q. Rotate the AMPLITUDE knob nearly CCW.
r. Set the test scope Volts/Div to 5mV.
s. Check the display for < 2 divisions (10mV) as the knob nears the CCW stop.
3. Square Wave Rise Time and Fall Time
a. Test Scope Set-Up:
Volts/Div 5V
Time/Div 0.5 uSec
Trig Slope +
b. Set-Up:
AMPLITUDE CW
DC OFFSET Pushed In
RANGE 100K
FUNCTION Square Wave
VOLTS OUT Button Out
FREQ/10 Button Out
FREQ DIAL 3.0
c. Connect MAIN OUTPUT to test scope vertical input via coax cable WITHOUT
the 50 ohm terminator.
d. Adjust AMPLITUDE knob for a 4 division display on the test scope.
e. Set Time/Div to 50 nSec/Div. Adjust Trig Level control as necessary to display
the rising edge of the Square Wave.
f. Check risetime between the 10% and 90% points for < 100 nSec (2 Div).
g. Set test scope Trig Slope to - (negative). Adjust Trig Level to view the Falling
edge of Square Wave.
h. Check the Fall Time between the 10% and 90% points for < 100 nSec (2 Div).
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