WD30-AT001 Omron, WD30-AT001 Datasheet - Page 29

• Manufacturer Part Number: WD30-AT001
• Description: REMOTE WIRELESS ANTENNA'S DNET
• Manufacturer: Omron

Specifications of WD30-AT001

• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: WD30AT001

Points for Consideration with Wireless Systems
Setting wireless channels
Antenna separation
distance
Test confirmation
Intermodulation
It is necessary to select frequencies for the wireless channels that are not
interfered with by radio waves. (Radio interference can be handled by retry
processes between the wireless networks, but will lengthen the system
response time.)
With this unit, 34 wireless channels can be selected from. Taking the following
points into consideration, however, the maximum number of wireless systems
usable in a single area without radio interference is, as a rough guide, 10.
1. It is possible that, for example, there is a wireless LAN on site that uses the
2. Do not select neighboring wireless channels as they have a large amount
3. Due to the fundamental nature of radio waves, if 2 or more waves with dif-
Do not select the frequencies of waves created by intermodulation.
The distance between wireless units has a large influence on the amount of
interference received. In particular, there may often be cases where wireless
master stations are installed relatively closely to each other. Separate the
antennas for different wireless master stations by at least 1 m (at least 2 m, if
possible).
Perform a test to see whether or not the wireless units are receiving interfer-
ence. Using the Configurator’s running test function, obtain the packet error
rate, and, based on this, determine whether or not the communications quality
is sufficient for the application. (As a rough guide, the packet rate should be
less than 0.01.)
Due to the fundamental nature of radio waves, if 2 or more waves with different frequencies are
output at exactly the same time, mutual interference will occur between the different frequencies,
and new waves will be generated with frequencies at intervals equal to the intervals between the
output frequencies.
same frequency as this unit. Select an unused wireless channel using the
Configurator’s wireless channel monitor function.
of interference.
ferent frequencies are output at exactly the same time, mutual interference
will occur between the different frequencies, and new waves will be gener-
ated with frequencies at intervals equal to the intervals between the output
frequencies. (This phenomenon is called “intermodulation.”)
f
1
-(f
2
- f
1
Radio wave created
by intermodulation
)=1ch
Wireless slave
station
Wireless master
station
f
1
=5ch
Wireless slave
station
f
2
Wireless master
station
=9ch
Radio wave created
by intermodulation
Section 1-5
f
2
+(f
2
- f
1
)=13ch
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