Tektronix TG8000 - Page 54

Mainframe clock adjustment
7. Press the up (▲)
or down (▼) arrow button to select CAL OVEN : SELECT,
and then press the ENTER button.
8. A message will
be displayed asking you to verify that you want to execute the
calibration. Press the ENTER button to proceed with the calibration.
9. Verify that
the message CALIBRATION result = xxxxxxx is displayed.
The result should be seven characters near the value of 2,097,152.Pressthe
ENTER button to exit the calibration mode.
10. Verify the calibration:
a. Press the M
ODULE button until TG8000 : PRESET appears.
b. Press the up (▲)ordown(▼)arrowbuttontoselectUTILITY,andthen
press the
ENTER button to access the UTILITY submenu.
c. Press the up (▲)ordown(▼)arrowbuttontoselectDIAGNOSTICS,
and then
press the ENTER button to access the DIAGNOSTICS submenu.
d. Press the left (◄)orright(►)arrowbuttontoselectDIAGNOSTICS :
CAL.
e. Check that the CAL value is less than 2.5 e
-6
.
NOTE.
IftheCALvalueisgreaterthan2.6e
-6
, then the oscillator oven may need
to be serviced.
2–6 TG8000 Multiformat Test Signal Generator Service Manual