
Diagnostics
RFI-148 250W VHF Paging Transmitter User Manual
Page 24 of 43
5.3.2 Recovery
The paging transmitter can save the current firmware and configuration to non-volatile storage. The recovery
image can be reverted to in case of configuration loss, or a new firmware image loaded has undesired
behaviour.
After a firmware recovery the paging transmitter will latch a firmware update exception fault.
5.4 Time
5.4.1 Real Time Clock
A real time clock is used to track the passage of time. The clock is used for:
Keeping a time-stamped history of faults.
A short history of transmitter events (PTT on, off).
5.4.2 SNTP Client
The transmitter supports time synchronisation using the Simple Network Time Protocol (SNTP) version 4.
MODES OF OPERATION
The SNTP client has three modes of operation:
Disabled:
The paging transmitter will not perform any time synchronisation.
Unicast:
The paging transmitter will query a time server for time updates.
Broadcast:
The paging transmitter will listen for time server updates.
In unicast mode the IP address of the time server must be specified. By default, the paging transmitter will
query the time server at start-up and once per hour and wait a maximum of 10 seconds for a response.
TIME ZONE
The time zone can be specified in hours and minutes as an offset from Coordinated Universal Time (UTC).