Tektronix 222PS Operator's Manual page 168

Appendix C: Quick Checks
Procedure
1. Press the AUX FUNCT button to bring up the AUX menu.
2. Select SELF CAL from the menu.
Disconnect both the Channel 1 and Channel 2 probes
from any signal source before performing the self calibra
tion routines.
3. Select CH1 from the SELF CAL submenu to start the Channel 1
self calibration routine. When the oscilloscope displays a PASS/
FAIL message, the first routine is done.
4. Select CH2 from the SELF CAL submenu to start the Channel 2
self calibration routine. When the oscilloscope displays a PASS/
FAIL message, the second routine is done.
5. Select EXT TRIG to display the external trigger self calibration
menu.
For this self calibration routine, the EXT TRIG COMM and
EXT TRIG INPUT connectors must be connected together.
Use a short jumper with banana plug connectors to make
the connection.
6. Select CAL to start the external trigger self calibration routine after
the EXT TRIG COMM and EXT TRIG INPUT connectors are
joined. A PASS/FAIL message is displayed when the routine is
done. Remove the jumper.
7. Press the CLEAR button at the completion of the self calibration
routines to return to normal oscilloscope operation. You are now
ready to make the performance checks.
If a self calibration step fails, the currently stored calibration constants
are not changed. Run the failed routine again. Refer to the Trouble
shooting in the Maintenance section of the 222PS service manual for
an explanation of the error codes.
A 40
NOTE
NOTE
Appendices