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Sure Cross
Performance DX80 Wireless I/O Networks
4.3.3 Collocated Radios
When the radio network's master device is located too close to another radio device, communications between all devices
is interrupted. For this reason, always assign a unique Network ID to your wireless networks.
The Network ID (NID) is a unique identifier you assign to each wireless network to minimizes the chances of two collocated
networks interfering with each other. Assigning different NIDs to different networks improves collocation performance in
dense installations.
Do not install antennas within the minimum separation distance.
Antenna Minimum Separation Distance
900 MHz, 150 mW and 250 mW: 2 m (6 ft)
900 MHz, 1 Watt: 4.57 m (15 ft)
2.4 GHz, 65 mW: 0.3 m (1 ft)
4.3.4 Be Aware of Seasonal Changes
When conducting the initial Site Survey, the fewest possible missed packets for a given link is better. However, seasonal
changes may affect the signal strength and the total signal quality. Radios installed outside with 50% missed packets in the
winter months may have 80% or more missed packets in the summer when leaves and trees interfere with radio reception.
Figure 3. A good signal in winter doesn't always mean you will get the same signal strength the rest of the year.
4.4 Installing a Basic Remote Antenna
A remote antenna system is any antenna system where the antenna is not connected directly to the radio; coaxial cable
connects the antenna to the radio.
When installing a remote antenna system, always include a lightning arrestor or coaxial surge suppressor in the system.
Remote antenna systems installed without surge protection invalidate the warranty of the radio devices.
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Figure 4. During spring and summer, leaves may block more of the radio signal.
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