To calibrate your OCX HD please follow these steps:

Ensure the Atomic Clock is warmed up, atomic signal is fed to the Atomic Input and the OCX HD Atomic Clock Indicator is lit.

1. Click on Calibration and the device will enter Calibration Mode
2. The indicator will show a number which will stabilize with time. Wait for it to become stable. This number represents the error of the OCX HD’s clock related to the Atomic Clock. To compensate this error press the “Calibrate” button.
3. Repeat the procedure as many times as necessary until the number becomes as close to Zero as possible and relatively stable (number may have small deviations in few seconds). To exit the mode press the Standby button.