RACOM RipEX, Руководство пользователя

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arp -d 192.168.169.169
or delete the entire table by typing:
arp -d *
Then you can ping the newly connected RipEX again.
5. I have assigned the RipEX a new IP address and my PC lost connection to it.
• Change the PC’s IP address so that it is on the same subnet as the RipEX.
6. I entered the Router mode and lost connection to the other RipEX’s.
• Enter correct data into the routing tables in all RipEX’s.
7. The RSS Ping test shows low RSS for the required speed.
• Use higher output, a unidirectional antenna, better direct the antenna, use a better feed line,
taller pole. If nothing helps, lower the speed.
8. The RSS Ping test reports good RSS but low DQ.
• When the DQ value is much lower then it should be at the given RSS, typically it is a case of
multi-path propagation. It can cause serious problems to data communication, especially when
high data rates are used. Since the interfering signals come from different directions, changing
the direction of the antenna may solve the problem. A unidirectional antenna should be used
in the first place. Metallic objects in close vicinity of the antenna may cause harmful reflections,
relocating the antenna by few meters may help. Change of polarization at both ends of the link
could be the solution as well.
9. The RSS Ping test shows bad homogeneity.
• Quite often the bad homogeneity comes together with a low DQ. In that case follow the advice
given in the previous paragraph. If the DQ does correspond to the RSS level, you should look
for unstable elements along the signal route – a poorly installed antenna or cable, moving
obstacles (e.g. cars in front of the antenna), shifting reflective areas etc. If you cannot remove
the cause of disturbances, you will need to ensure signal is strong enough to cope with it.
209 © RACOM s.r.o. – RipEX Radio modem & Router
Troubleshooting