GE MDS SD Series Technical Manual page 63

•
Min/Max Channel Wait (ms)
wait after the channel is free before transmission is allowed.
Minimum wait time: Normally, the minimum channel wait time should not be changed
from its default setting of
the responses from multiple Remotes.
Maximum wait time: Normally, this setting should not be changed from its default of
unless performing advanced operations. Some examples of when this may be benefi-
ms
cial include:
• There is a need to stagger responses from several Remote radios.
• The transmission latency from the time the channel is free is too high, in which
case a lower value can be entered.
• Collisions over the air are too high, in which case a higher value can be entered.
NOTE The lower the value of the Maximum Wait Time, the higher the chances of collisions
occurring over-the-air. Conversely, the higher the value of the Maximum Wait Time, the
higher the transmission latency.
• — Provides a setting for the maximum wait time (in milliseconds) for the
Timeout (ms)
channel to become free. When this time is exceeded, the radio follows the action defined
in the
Packet Action on Timeout
•
Packet Action on Timeout
has expired and the channel is still not available. If set to
set to , transmission of the packet is attempted despite the channel being busy.
Send
•
Clear Channel RSSI (dBm)
radio's operating frequency. If a carrier is present, transmission is inhibited. The
setting allows a threshold to be set which, when equaled or exceeded, de-
Channel RSSI
clares the channel busy and therefore unavailable for transmitting.
IP Payload Configuration (1/2/3)
This section describes how to setup and configure the Master radio for exchanging IP/Ethernet
Payload data with Remote radios. It is an efficient feature that supports Ethernet connectivity
with maximum over-the-air (OTA) efficiency for UDP and TCP data streams. Remote radios re-
ceiving the data can then forward this traffic to their serial ports or Ethernet port. This feature is
particularly useful for adding Ethernet devices to a mixed system using MDS SDx and x710
Transceivers. This feature is different than Ethernet Bridging, which is described on Page 50 in
the Bridge Configuration Section.
NOTE To make use of this feature, the radio must be properly authorized for Ethernet data. If it
is not, contact your sales representative for further information.
It is helpful to understand that IP data is terminated at the radio, yet the payload data is transmit-
ted OTA. As such, the radio acts as a terminal server converting IP data into a serial "over-the-
air port." In other words, a transmitting radio receives an IP message, strips off the IP headers,
and sends it over the air with VRC identification (VRC-1, VRC-2, or VRC-3). A receiving radio
may then be set up, for example, to have
MDS 05-4864A01, Rev. I
— These settings refer to the time period (in milliseconds) to
unless performing advanced operations, such as staggering
0 ms
setting (either
Drop
— Determines what to do with a packet once the timeout period
— LBT works by sensing the presence of a carrier signal on the
or an IP port deliver all VRC-1 traffic.
COM2
SD Series Technical Manual
or ).
Send
, the packet is discarded. If
Drop
100
Clear
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