9th
3. 1. TX Rate
（
Default
：
QPSK FEC 1/2
）
:
This setting determines the modulation type and in turn the rate at which the data is to be
wirelessly transferred.
The default and recommended setting for both Master and Slave units
is ‘Auto’.
When in ‘Auto’ the unit will transfer data at the highest possible rate in consideration
of the receive signal strength (RSSI).
Refer to Performance for a table breakdown of performance at selected rates. If setting a fixed
TX Rate It is recommended to retain a fade margin of at least 10 dbm for optimum performance.
For example, for a link (8MHz channel) with a signal strength of at least –75dBm, a TX rate of
16-QAM 3/4 FEC is recommended. Setting to the highest rate with a poor link may result in
reduced performance.
3.2. Channel Bandwidth
（
Default
：
4Mhz
）
:
Select the channel bandwidth from the list. Refer to the specifications to see the
relationship and performance between channel band, width,throughput and
sensitivity.Generally a larger channel has greater throughput, at the cost of sensitivity,
while a smaller channel tends to be more robust, but at the cost of throughput.
3.3. Channel-Frequency
（
Default
：
2479Mhz
）
:
2402 - 2482 (1MHz BW, CH 1-81)
2402 - 2482 (2MHz BW, CH 1-81)
2405 - 2479 (4MHz BW, CH 4-78)
2407 - 2477 (8MHz BW, CH 6-76)
3.4. Wireless Distance
（
Default
：
10km
）
:
The Wireless Distance parameter allows a user to set the expected distance the
wireless signal needs to travel. The TDD-COFDM sets various internal timeouts to
account for this travel time. Longer distances will require a higher setting, and
shorter distances may perform better if the setting is reduced.
