User's Manual

APPENDIX D
RADIO CONFIGURATION
Revised: 18 Mar 08 APX D-1 EST P/N AA107G
195Eg FREQUENCY OF OPERATION
In a wireless Ethernet network all of the ESTeem Model 195Eg’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 195Eg (reference Chapter 4). See Figure 1.
RF COMMUNICATIONS DATA RATE
The RF data rate of the Model 195Eg 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 195Eg from monitoring the
received signal quality. The Model 195Eg can communicate with multiple 802.11g 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 802.11g and 802.11b devices regardless of their
generation, data rate, and signal quality requirements.
Dynamic scaling means that the Model 195Eg 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 192E 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 192E will increase
the RF data rate the next highest level.
The ESTeem 195Eg 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 195Eg 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
Channel Number Frequency
1 2412 MHz
2 2417 MHz
3 2422 MHz
4 2427 MHz
5 2432 MHz
6 2437 MHz
7 2442 MHz
8 2447 MHz
9 2452 MHz
10 2457 MHz
11 2462 MHz