Tektronix SPG8000 Technical Reference page 101

SPG8000 Specifications and Performance Verification
8. Check the Tune values. This is the amount that the SPG8000 is tuning to lock
to the GPS or GLONASS signal. If this is more than ±0.1 e
calibration is recommended and you should proceed to step 8. Otherwise
exit the procedure.
9. Calibrate the oven correction as follows:
a. Press the SYSTEM button.
b. Press the up (▲) arrow button several times until you see CALIBRATE
OVEN.
c. Press the up (▲) arrow button until you see DIAGNOSTICS, and then
press the ENTER button.
d. Press the down arrow button until you see SYSTEM : DIAGNOSTICS :
CALIBRATION and a value such as Cal: –0.13 e
10. Record the value you see in the test record. This is the correction that is being
applied to the internal oven in over to achieve calibration.
NOTE. If the value is outside the test limits, then the Oven has drifted more than
expected and might need to be replaced.
Performance verification
, then oven
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(2069204).
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