APPENDIX D
RADIO CONFIGURATION
Revised: 30 Jun 08
APX D-1
EST P/N AA107D
195Ed FREQUENCY OF OPERATION
In a wireless Ethernet network all of the ESTeem Model 195Ed’s must be set to the same radio frequency of operation or channel.
Listed on the right is a table showing the channel and corresponding frequency of operation. The frequency of operation is
selectable when configuring the mode of operation of the 195Ed (reference Chapter 4). See Figure 1.
RF COMMUNICATIONS DATA RATE
The RF data rate of the Model 195Ed can be programmed for operation at 1, 2, 5.5, 6, 9, 11, 12, 18, 24, 36, 48, or 54 Mbps. The
RF data rate can be set for a fixed rate or a specific range that is dynamically scaled by the Model 195Ed from monitoring the
received signal quality. The Model 195Ed can communicate with multiple client 195Ed devices at different data rates for each
device. By selecting all ranges from 1 to 54 Mbps you will be able to communicate with all client 195Ed regardless of their data
rate and signal quality requirements.
Dynamic scaling means that the Model 195Ed will operate at the highest RF data rate that is programmed into unit. If the received
data quality drops below the required minimums for reliable communications the Model 195Ed will reduce the data rate to the next
lowest step to increase signal quality. Conversely if the signal quality increases above the minimums the Model 195Ed will
increase the RF data rate the next highest level.
The ESTeem 195Ed is set at the factory to operate at maximized scaling speed data rates from 1-54 Mbps and should not need
adjustment. The RF Data Rate is programmed in the Model 195Ed through the Advanced Menu>Wireless LAN Settings>Wlan0
Device and the value for wlan0_OPRATES:. In the example shown in Figure 2 the RF Date Rate is programmed to dynamic scale
from 1 to 54 Mbps (recommend factory default setting). To set the values for the data rate, check the box next to the listed data rate
to enable this rate for operation.
Figure 1: RF Channel Selection