Orolia GSG-5 Series, Руководство пользователя с руководством по SCPI, Страница: 121 / 392

Calibration Recommendations
Is recommended that you adhere to the following calibration guidelines :
1.
Orolia recommends calibration every 2 years to ensure the frequency is within spe-
cification and the power levels are correct.
2.
If your unit is equipped with an Ultra-High-Stability OCXO (an option that is no
longer available), Orolia recommends calibration every year for this reference to
ensure operation to specifications.
3.
Regardless of which oscillator option is installed in your GSG unit: If you are testing
GPS timing receivers and are testing the precision of the 1 PPS output, comparing it
to the 1 PPS output from your device under test, Orolia recommends calibration
every year.
To carry out a user calibration, highlight Calibrate and press enter . Confirm your choice,
and enter the password, in order to make sure the calibration settings are not changed unin-
tentionally. The password is
62951413 (first 8 digits of π backwards).
Figure 3-42:
Entering the calibration password
Note: It is strongly advised to write down the current values before making
any changes. Once new values are saved, the old values cannot be recalled.
Figure 3-43:
User Calibration view
During the calibration, the unit generates an unmodulated signal at full power. Maximum
RF power is measured by a spectrum analyzer connected to the RF output of your GSG
unit.
3.6 "Options" Menu
User Manual GSG-5/6 Series Rev. 27 105