Weidmuller WI-MOD-945-E: 900Mhz Wireless Ethernet & Device Server v2.16 - Manual (Page 22)

Weidmuller Wireless Ethernet Modem & Device Server WI-MOD-945-E User Manual
Page 22 www.weidmuller.com Rev 2.136

4 x non overlapping 1.25MHz channels

4 x partially overlapping 2.5MHz channels

3 x overlapping 5MHz channels

1 x 10MHz channel
If operating in Hong Kong the frequency range is 922-925MHz and the available channels are:

2 x non overlapping 1.25MHz channels

1 x 2.5MHz channel
Regions will only show the available channels for that location.
See below for a diagram of the frequency ranges and channels.
Figure 10 - 900MHz Channels
Each Country/Region has a different frequency regulation with multiple band widths and numerous channels available.
The main reason for having different channels and bandwidths is to allow multiple radios to operate in close proximity with
minimal interference.
As you can see from the Channels Diagram and the Data Throughput Table (below) the greater the band width the
greater the overall data throughput.
If selecting the high band width, i.e. 20MHz you will be limited to one channel which may be more susceptible to outside
interference because it spans the available 900MHz frequency range, in some regions this high band width option may
not even be available.
If selecting the lower bands, i.e. 1.25MHz you have more channels available and each channel is non-overlapping
(Adjacent channels do not cross over), however the Data throughput will be considerably lower.
If you require a high data throughput then the higher band width will need to be selected and care with antenna
placement, etc will also need to be taken into account.