Specifications

2-2.7
Proprietary and Confidential
OPTIONAL BATTERY BACKUP
The battery backup keeps the GPS receiver, 10 MHz OCXO and associated
PFRU circuitry alive for approximately 15 minutes* during a power
failure.
This is to ensure that when power is restored, the operator does not
have to wait for a GPS re-acquisition or the oscillator to warm back up
and re-stabilize. Saves time on restart.
Currently under development is a replacement that will keep the exciter
section operating for 1 minute and the PFRU and GPS alive and
disciplined for 25-30 minutes.
Operation of this circuitry and battery backup option are recommended
for SFN installations.
*When batteries are new and fresh. These batteries should be
considered a routine maintenance item and replaced at appropriate
intervals.
Replacement every 2-3 years is recommended (500 recharge cycles).