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Performance Tests
CSA 803A Service Manual
4Ć43
This procedure verifies the correct operation and accuracy of the
CSA 803A's Internal Clock signal.
Measurement Limits
The measurement limits of the internal clock pulse are as follows:
H rise time v2.5 ns
H frequency of 100 kHz ±3% accuracy
H duty cycle 50% ±3%
Setup to Examine Internal Clock
CSA 803A
Internal Clock Output
12I RF Cable
CH 1
Procedure to Examine Internal Clock
ăStep 1:ăInstall the SDĆ24 Sampling Head into the position shown in the
setup diagram (CH 1/CH 2 slot). If the unit was in standby mode, set the
ON/STANDBY switch to ON.
ăStep 2:ăInitialize the mainframe as follows:
UTILITY button press...........................................
Initialize (in major menu) touch..............................
Initialize (in verification popĆup menu) touch..................
ăStep 3:ăTrigger the CSA 803A as follows:
TRIGGER Button press.........................................
Source (in popĆup menu) Internal Clock......................
ăStep 4:ăOn the Sampling Head, press the Channel 1 select button.
Internal Clock