Electronic Systems Technology ESTEEM195EP BASE STATION TRANSMITTER User Manual CHAPTER 2

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Document ID	690209
Application ID	vBqnE+9ehrWRFYT0Th12ZQ==
Document Description	RADIO CONFIGURATION
Short Term Confidential	No
Permanent Confidential	No
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Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	21.58kB (269812 bits)
Date Submitted	2006-08-04 00:00:00
Date Available	2006-08-04 00:00:00
Creation Date	2006-07-25 15:35:28
Producing Software	Acrobat Distiller 7.0.5 (Windows)
Document Lastmod	2006-07-25 15:35:53
Document Title	CHAPTER 2
Document Creator	Acrobat PDFMaker 7.0.7 for Word
Document Author:	Eric P. Marske

APPENDIX D
RADIO CONFIGURATION
195Ep FREQUENCY OF OPERATION
In a wireless Ethernet network all of the ESTeem Model 195Ep’s must be set to the same radio frequency of operation or channel.
The frequency of operation is selectable when configuring the mode of operation of the 195Ep (reference Chapter 4). See Figure
1.
Figure 1: RF Channel Selection
RF COMMUNICATIONS DATA RATE
The RF data rate of the Model 195Ep can be programmed for operation at 1, 2, 5.5, or 11 Mbps. The RF data rate can be set for a
fixed rate or a specific range that is dynamically scaled by the Model 195Ep from monitoring the received signal quality. By
selecting all ranges from 1 to 11 Mbps you will be able to communicate with all mobile or remote locations devices regardless of
their signal strength.
Dynamic scaling means that the Model 195Ep 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 195Ep 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 195Ep will
increase the RF data rate the next highest level.
The ESTeem 195Ep is set at the factory to operate at maximized scaling speed data rates from 1-11 Mbps and should not need
adjustment. The RF Data Rate is programmed in the Model 195Ep 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 11 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.
Revised: 16 Jun 06
APX D-1
EST P/N AA107P
APPENDIX D
RADIO CONFIGURATION
Figure 2: Advanced Data Rate Selection
RF BASIC RATE
The RF Basic Rate is the synchronization rate used to establish the initial connection between 802.11g and 802.11b
communication devices in Mbps. After the initial connection has been establish the RF communication rate will be determined by
the RF Communication Data Rate established above. Factory default is 1 through 11 Mbps shown in Figure 2 so that the unity
will establish communication with the older (slower) 802.11b devices. This lower rate also allows for a quicker reconnect when
the ESTeems are configured for EtherStation mode or working in a mobile environment.
The ESTeem 195Ep is set at the factory to operate at all speeds from 1-11 Mbps and should not need adjustment. The RF Basic
Rate is programmed in the Model 195Ep through the Advanced Menu>Wireless LAN Settings>Wlan0 Device and the value for
wlan0_AP_BASICRATES:. In the example shown in Figure 2 the RF Date Rate is programmed to dynamic scale from 1 to 11
Mbps (recommend factory default setting). To set the values for the data rate, check the box next to the data rate required.
Note: The Model 195Ep will only communicate with slower speed devices after synchronization if the RF Communication Data
shown above has been set to dynamically scale to 1 and 2 Mbps.
In general, do not set the RF Basic Rates above 11Mbps unless specifically instructed by ESTeem Customer Support.
Revised: 16 Jun 06
APX D-2
EST P/N AA107P

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