4RF Aprisa SR+ User Manual - page 94
Managing the Radio | 91
Aprisa SR User Manual
Serial > Advanced
SERIAL SUPPORT
Serial Data Mode
The Serial Data Mode can be set to Enabled or Disabled. The default setting is Enabled.
Serial Data Mode
Function
Enabled
Enables serial data communication over the radio link.
Disabled
Disables serial data communication over the radio link.
Serial Data Priority
The Serial Data Priority controls the priority of the serial traffic relative to the Ethernet traffic. If equal
priority is required to Ethernet traffic, this setting must be the same as the Ethernet Data Priority setting.
The serial data priority can be set to Very High, High, Medium and Low. The default setting is Very High.
A queuing system is used to prioritize traffic from the serial and Ethernet interfaces for over the air
transmission. A weighting may be given to each data type and this is used to schedule the next
transmission over the air e.g. if there are pending data packets in multiple buffers but serial data has a
higher weighting it will be transmitted first. The serial buffer is 20 serial packets (1 packet can be up to
512 bytes).
There are four priority queues in the Aprisa SR: Very High, High, Medium and Low. Data is added to one of
these queues depending on the priority setting. Data leaves the queues from highest priority to lowest:
the Very High queue is emptied first, followed by High then Medium and finally Low.