Tektronix CSA 803C Internal Clock

Performance Tests
CSA 803C Service Manual 4Ć43
This procedure verifies the correct operation and accuracy of the
CSA 803A's Internal Clocksignal.
Measurement Limits
The measurement limits of the internal clock pulse are as follows:
Hrise time v2.5 ns
Hfrequency of100 kHz ±3% accuracy
Hduty cycle 50% ±3%
Setup to Examine Internal Clock
CSA 803C
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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/STANDBYswitch to ON.
ăStep 2:ăInitialize the mainframe as follows:
UTILITYbutton press...........................................
Initialize (in major menu) touch..............................
Initialize (in verification popĆup menu) touch..................
ăStep 3:ăTriggerthe CSA 803C as follows:
TRIGGERButton press.........................................
Source (in popĆup menu) Internal Clock......................
ăStep 4:ăOn the Sampling Head, press the Channel 1 select button.
Internal Clock