OTC Wireless WiSER2400 manual Poor Link Quality, Radio Interference

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Poor Link Quality

If the Signal Strength indicator is reasonably high (>20%) and the Link Quality is not zero, but the “Link Quality” stays in the Poor range, it could be due to one of the following reasons:

Make sure that radio interference is not present in the radio network.

Make sure that the radio is not surrounded by many strongly reflecting (metallic) surfaces. With multiple reflecting surfaces between the radio in question and the target radio, a severe multi-pathproblem may introduce high bit error rate despite a strong Signal Strength.

Make sure that there is no severe packet collision caused by a “hidden node” problem. A “hidden node” problem is the situation where the RF signal from two or more Station radios cannot reach each other (but can reach the AP). In such situation, multiple Stations may attempt to transmit data packet to the AP at the same time and therefore cause packet collision. To solve this problem, re-arrange the Stations in question such that the RF signals are mutually sensible by all Stations. There is no guarantee that the packet collision can be entirely eliminated, but the severity can be reduced enough to see visible improvement of the link quality.

Radio Interference

You may be able to minimize RF interference by doing the following:

Although WiSER2400, when properly configured, seeks a clear channel to use, it cannot avoid interference if too many 2.4GHz interference sources are present. A “clear” channel should be at least 20MHz, but preferably 30MHz, apart from any other channel in use. Find out other usages in this frequency band in the vicinity and try to coordinate the channel assignment with other users.

Reseat the WiSER2400 radio to a location where the interference is minimized; in general, increasing the distance between the radio pair may cause radio interference.

Avoid using 2.4GHz cordless phone in the vicinity of the radios

Keep the computer with the WiSER2400 radio away from the microwave oven and large metal objects.

Consult the dealer or an experienced radio technician for help and assistance.

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Contents 802.11b Wireless Serial Port Adapter WiSER2400.IP User Guide Page Table of Content Introduction Introduction Key Features WiSER2400.IP WiFi RadioInstallation of WiSER2400.IP PowerRS232 Connection Link Yellow Status LED’sPage Installation Installation of WiSER2400.IP Software System RequirementsOverview Diagnostic and Configuration UtilityRadio Status Panel Connection and Overall Status PanelConfiguration Panel Configuration PanelPage RS232 and Wlan Statistics Panel RS232 StatisticsWlan Statistics Security Panel Encryption sub-panelWEP Keys Creation Sub-panel Create WEP Keys with Manual Entries Page UDP/IP Implementation Learning the destination MAC address from ARP packetsOutgoing UDP/IP packet IP Header Incoming UDP/IP packet UDP headerBlank Pages Appear When Open the Utility Program TroubleshootingNo Radio Link No Data Transfer While the Radio Link is GoodRadio Interference Poor Link QualityTechnical Support WiSER2400 Software Appendix a Limited Warranty WiSER2400 HardwareFCC Radiation Exposure Statement FCC ID MKZ0207232XG FCC Rules and Regulations PartPage Glossary