33
Rev Version 1.4.1
Rev Version 1.4.1
Transmit Data Rate
You can configure the WI-MOD-xxx-E-5W module for different radio transmission
rates. The radio baud rate is displayed in kilobits per second (Kbps) for point-to-
point radio transmissions. Select a fixed rate for the radio to use from the drop-
down list.
The selections available are 9600 and 19200 Kbps for 25-kHz wide band or 4800 and
9600 Kbps for 12.5-kHz narrow band. The transmit data rate only applies to transmit
messages
—the radio can receive on either data rate.
NOTE Reducing in the configured data rate may increases the reliable range of
the module (transmission distance).
Frequency Step
Size
The frequency step size is the spacing between frequencies that you can select when
configuring the TX and RX frequencies. The steps sizes available are 5 kHz or
6.25 kHz.
Transmit Frequency
Sets the frequency for the radio transmitter. Frequency options will be in multiples of
the frequency step configured in the Frequency Step Size field. For example,
450.00500, 450.01000, 450.01500, 450.02000 (and so on) for a frequency step size of
5 kHz, or 450.00625, 450.01250, 450.01875, 450.02500 (and so on) for a frequency
step size of 6.25 kHz. Same would be in the 950 MHz range.
Receive Frequency
Sets the frequency for the radio receiver. Frequency options will be in multiples of
the frequency step size configured in the Frequency Step Size field. For example,
450.00500, 450.01000, 450.01500, 450.02000 (and so on) for a frequency step size of
5 kHz, or 450.00625, 450.01250, 450.01875, 450.02500 (and so on) for a frequency
step size of 6.25 kHz. Same goes for the 950MHz range.
The following are advanced radio parameters, and care should be taken when making changes to these settings.
Figure 33 Advanced Radio Parameters
Beacon Interval
(AP only.) This interval is the period between beacon transmissions sent by an access
point. The default value is 15 seconds, and may be adjusted from 1 to 60 seconds.
Reducing the beacon interval will increase the amount of radio messages in the
system, which could compromise normal communications. Do not change this setting
unless advised by a WEIDMULLER Systems Engineer.
Fragmentation
Threshold
(Client Stations only.) The maximum transmission unit (MTU) of data over the radio. If
more than this number of bytes is input into the module, it will be transmitted in more
than one message (or fragmented).
Disable SSID
Broadcast
(AP only.) This option is used to reduce bandwidth eavesdroppers from detecting the
radio network system address (SSID) by passively listening to beacon transmissions
from the access point. When disabled, access points will not transmit the system
address openly in beacon messages. This is particularly useful in unencrypted radio
networks and where all stations know the SSID of the access point.
Data Compression Allows you to enable or disable data compression. For details, see the following
section,
“Data Compression.”
