Novus NR300, Руководство пользователя

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USERS MANUAL NR300
REVISION D
DATE 8/16/21
Page #: 14 of 48 www.novuspower.com
Rubidium Discipline
During Rubidium discipline, the Rubidium module updates internal loop
coefficients to provide optimal frequency tuning.
When the sample period extends long enough, the Rubidium reports discipline
good.
Rubidium Discipline Achieved
The NR300 illuminates the READY LED indicator. The Rubidium module is now
able to be used as a calibration source in holdover mode.
Holdover (Portable Calibrator)
At this point, the user can press the HOLDOVER button. After confirming with a
long press of the button, the HOLDOVER LED indicator illuminates, and the unit
suspends power to the GNSS receiver, reducing power consumption. The LOCK
indicator shuts off, and the READY and HOLDOVER indicators are lit.
The unit can be taken away from the area where GNSS signal is available and
used as a Rubidium source.
GNSS Lock (Reacquire)
When the NR300 has completed its calibration duties, the unit can be returned to
an area where GNSS signal is available and reacquire GNSS lock. To do this,
press and hold the HOLDOVER button. The screen prompts for confirmation,
then indicates that GNSS power up has been started.
It is important at this point to ensure the unit has adequate GNSS signal to
achieve lock. To verify, return to the GNSS Status menu.
Frequency Verification
Once the GNSS has reacquired lock, the user can navigate to the FREQUENCY
screen by pressing the NEXT button. This screen reports the frequency of the
source as measured against the GNSS PPS.