8
9-Volt Backup Battery
The DVR 300i comes with a 9-volt backup battery to preserve checklist and
speech data in case the clock is removed from the airplane. The battery
will maintain speech data for 1-2 months. It is attached to the clock with a
high-strength Velcro, which actually withstands more g’s than a metal bat-
tery clip! In the unlikely event of an accident, the most recent radio traffic
will be preserved.
Troubleshooting
The DVR was designed to be maintenance-free, requiring only a one-time
volume adjustment. In rare cases, however, it may be possible for the unit
to “lock up” in noisy aircraft power environments.
If your unit appears to be hung up, you can reboot the system by switching
the power to Off (center position), and switch it on again while holding
down the Time button for 5 seconds. This process will erase all checklists
and other audio within the unit.
