User manual
38 www.cooperbussmann.com/wirelessresources
Cooper Bussmann 245U-E Wireless Ethernet Modem & Device Server User Manual
Rev Version 2.19
Radio Mode The 245U-E -G supports 802.11b and 802.11g radio standards. To limit operation to
one or the other, select the desired standard. Normally, selecting “Auto” allows the
modem to make the best choice.
The 245U-E -A only supports the 802.11a radio standard.
Transmit Power Level This allows adjustment of the radio power. Do not set the radio power above
the allowed setting for your country. You can reduce the power for short range
applications or to allow the use of high gain transmitter antennas while still complying
with the emission requirements of your country. See “Appendix C - CHANNELS” for
dB to mW conversion.
Channel (AP Only) The 245U-E-G radio channels 1 to 13 (depending on country) may be configured at
the access point. See “3.1 Selecting a Channel.”
The 245U-E -A radio channels can be individually set (access point only; client
ignores the selection), or left on Auto (default). Select the appropriate U-NII groups
(1, 2, 3, or 4), each having its own group of channels, maximum power, and DFS
selection.
The default radio channel for both A and G models is Auto. When set to Auto, on
startup the module will scan all available and selected channel groups (country
dependent) and pick the quietest channel.
Channel Width (STA
and Auto Channel
Only)
245U-E-G stations only. When configured as a station, the module will periodically
scan the channels looking for an access point. This option is used to speed up the
access point scanning process of the client radio by only scanning certain channel
bands (5 MHz, 10 MHz, and 20 MHz) or automatically scanning all channels. Default
is 20 MHz.
Turbo Mode (Only for fixed channels, No Auto). Selecting Turbo Mode doubles the transmit data
rate offered on a single channel. Maximum data rate up to 108 Mbps.
Only usable with other ELPRO 245U-E-A and G modules configured with the same
turbo channel. If using the Turbo mode feature, all modems in the system will need
to be configured with Turbo mode and the correct channel in order to communicate.
Transmit Data Rate The radio baud rate in Mega (million) bits per second (Mbps) for point-to-point radio
transmissions. The default value is Auto. Select a fixed rate to force the radio to use
the selected rate.
Fixing the TX Rate is not recommended except for advanced users.
NOTE Increasing the transmit data rate will decrease the transmit power
level. For example, selecting a 54-Mbps fixed data rate will reduce the
transmit power from 400 mW down to 125mW. This is to comply with 802.11
regulations.
Beacon Interval
(AP only)
This interval is the period between beacon transmissions sent by an access point.
The default value is 100 milliseconds, and it may be adjusted from 50 to 4095
milliseconds.
Max Distance Configure the maximum distance the radio signal is expected to travel. This allows
the modem to compensate for the flight time of messages as they pass from the
transmitter to the receiver, and as the acknowledgment messages are returned.
Setting this value larger will cause a small reduction in throughput. Setting this
value too small will cause communications problems over longer distances. Default
distance is 5 km.