RLX2-IHx Series ♦ 802.11a, b, g, n
Configuring a Radio - Detailed Configuration
Industrial Hotspots
User Manual
ProSoft Technology, Inc.
Page 80 of 248
Parameter
Description
TX Attenuation
This determines the amount of attenuation that will be applied to the output
power of the radio. Mainly used when high gain antennas are used that would
exceed the max Tx power allowed by the local regulatory body for the region
the RLX2 will be installed
Active Antennas
This determines which of the RLX2's antenna ports are active. This control
must be set to match the number of antennas that are actually installed. Note
that 2 or more antennas are needed in order to achieve 2 stream (MCS8-15)
data rates. When only 2 antennas are installed they should use antenna Ports
A and C.
Tx Stale Time
Packets queued for transmission will be discarded if they have not been
transmitted in the time set by this control. The main purpose of this control is
to limit the duration of any congestion peaks that may occur on a channel that
has high utilization. In industrial networks most data packets are time sensitive
and if they do not arrive by a certain time are treated as if they were lost.
Transmitting these packets after such a timeout would serve no purpose and
simply adds load to the radio channel.
On a busy channel any burst of interference or sudden unwanted load, such
as a burst of broadcast traffic, may lead to large Tx latency times if the
channel becomes saturated. Continuing to transmit stale data packets
prolongs this condition even though the packets have already been treated as
if lost by their destination. The default of this control is also the max value of
60,000 msec. The minimum allowed is 10 msec. This control should only be
modified from its default if the packet load in aggregate on a channel is close
to saturating the channel, and set to a value that is greater than the max
timeout value for any application connection.