36
Utility Software
7.6
Starting the Learn Mode
Initially, the very first time that the clock starts up, it will be in the Promiscuous Mode. While in
this mode, the clock is not protected against GNSS spoofing, clock movement and other things that
would disturb its operation. To run securily against these disturbances, the clock must go through
a Learn Mode for approximately 24 hours after which it will enter the Normal Mode. If the Learn
Mode is never initiated, a clock will continue to run in the Promiscuous Mode. Secure operation
is not possible in the Promiscuous Mode or the Learn Mode. Once the clock passes through the
Learn Mode, it will never again operate in the Promiscuous Mode.
To initiate the Learn Mode, in the Utility menu, choose Device, then Start the Learn Mode, or
click the Start the Learn Mode icon. Another menu should appear to verify your choice, yes or no.
Once the Learn Mode is initiated, the orange LEARN LED will illuminate for approximately 24
hours. After 24 hours, and a successful Learn operation, the clock will revert to the Normal Mode
and the green NORMAL LED will illuminate and the LEARN LED will extinguish.
Figure 7.4: Initiating the Learn Mode
Содержание 1200B
Страница 4: ...iv ...
Страница 135: ...A 3 Physical Dimensions 117 Figure A 2 Suggested Mounting of the GNSS Surge Arrester ...
Страница 143: ...B 7 Four Fiber Optic Outputs 125 Figure B 4 Jumper Locations ...
Страница 145: ...B 8 8 Channel High Drive IRIG B Amplifier 127 Figure B 5 8 High Drive Outputs Jumper Locations ...
Страница 161: ...B 10 Four Additional Outputs and Dry Contacts 25 50 Vdc 143 Figure B 7 Option Connector Signal Locations ...
Страница 212: ...Appendix E Statement of Compliance The following page is a statement of compliance that includes Model 1201B and 1201C ...