HN-591
Set Packet Retries
If
ARQ Mode
is set to 0, it sets the number of times the radio will attempt to send an
unsuccessful transmission before discarding it. If
ARQ Mode
is set to 1, it is the
number of times every transmission will be sent, regardless of success or failure of a
given attempt. When this parameter is set to 255, RF flow control mode is entered for
transmissions from the radio. This mode can be entered for one or both radios in a
point-to-point system. Using this mode in a point-to-multipoint system will stop
transmissions to all radios when any one radio has a full buffer.
Set Hop Duration
This command sets the length of time the transceiver spends on each frequency
channel. A smaller value will allow the remote to lock on to the base signal faster at
system startup, and will generally decrease packet latency. A larger value increases
network capacity, due to decreased overhead in channel switching. This Set Hop
Duration value only needs to be set in the base which broadcasts the parameter to all
remotes. However, link time can be reduced if this value is also programmed into the
remotes, which use it as a starting value when scanning for the base.
The speed at which the radio hops affects both latency and throughput. The faster the
radio hops, the shorter the latency but the lower the throughput. The minimum packet
length and packet timeout allow fixed-length packets of data to be transmitted on a
single hop without leaving data stuck in the radio’s transmit buffer.
NOTE: If the hop speed is too fast, there may not be time to send a long packet on a
single hop.
Refer to the
Protocol Commands
section of this manual for details on these
commands.
©
2000- 2004 Cirronet
™
Inc
11
M-910-0012
Rev
A
