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Performance Tests
CSA 803A Service Manual
4Ć35
ăStep 5:ăEngage high precision calibration mode as follows:
UTILITY button press...........................................
Page to Enhanced Accuracy touch..........................
Time Base Cal Mode (in major menu) touch..................
High Prec (in popĆup menu) touch...........................
Exit (in popĆup menu) touch.................................
Sweep Rate Accuracy 2 ns/div
ăStep 6:ăAdjust the Sweep Rate to 2 ns/div.
Horizontal icon touch..........................................
Set Main Size to 2 ns/div adjust upper knob...................
ăStep 7:ăAdjust the Signal Generator to the following settings:
Frequency 55 MHz.............................................
Amplitude 1.0 V
RMS
............................................
NOTE
Check that selected Sampling Head channel (1) indicator is flashĆ
ing. If not, select channel (1) by pressing select button.
ăStep 8:ăTurn mainframe averaging on.
WAVEFORM button press.......................................
Acquire Desc (in major menu) touch.........................
Average N On (in popĆup menu) touch.......................
Select Exit (in the popĆup menu) touch.......................
NOTE
Position the display so the sine wave is centered on the screen. To
ensure accurate period measurement, the display must be a full
cycle.
ăStep 9:ăObtain Period as follows:
MEASURE button press........................................
Measurement (in major menu) touch.........................
Period (in popĆup menu) touch..............................
Exit Menu (in popĆup menu) touch...........................
ăStep 10:ăExamine that the period is between 18.172 ns and 18.192 ns,
showing that the sweep rate accuracy is within .05%.