User's Manual

9 Installing the EUM
APCD-LM043-4.0 121
Gateway IP Address: 10.5.0.1
Console>
Console> radio
RF Power: HIGH
Radio Frequency: 9170
Console>
Console> ra rssi
Press any key to stop
RSSI RX; TX; R1; R2; R3; F;Retry%
RSSI: 44 0; 0; 0; 0; 0; 0; 0%
RSSI: 60 712; 0; 0; 0; 0; 0; 0%
RSSI: 59 706; 0; 0; 0; 0; 0; 0%
RSSI: 62 812; 0; 0; 0; 0; 0; 0%
RSSI: 58 819; 0; 0; 0; 0; 0; 0%
RSSI: 60 809; 0; 0; 0; 0; 0; 0%
RSSI: 45 829; 0; 0; 0; 0; 0; 0%
RSSI: 61 834; 0; 0; 0; 0; 0; 0%
RSSI: 60 818; 0; 0; 0; 0; 0; 0%
EUM Console>
9.4.14 Troubleshooting
Q: I cannot receive a good signal, regardless of where I place the antenna. What should
I do?
A: The threshold receive signal level for the fast flashing Radio LED is -80dBm, which
provides an operating margin of up to 9 dB. In some cases, an installation will not require this
much margin, and the unit will function at a lower signal level. If the LED is flashing slowly, the
amount of receive signal can be determined using the EUM CLI command <ra rssi> or the
EUM Configuration Utility. If the signal is above -84dBm, it may be adequate, and detailed
tests should be carried out to determine the link robustness under these signal conditions.
If it is not possible to obtain an adequate signal level from the indoor antenna, an outdoor
antenna may be required. Installation of an outdoor antenna requires the services of a
qualified Professional Installer, proficient in the use and installation of ISM-band radio
equipment, and knowledgeable about local codes related to the installation of outdoor
antennas. Once an appropriate antenna is installed, and an adequate signal level is achieved,
the installation can proceed as outlined above.
Q: I have found a great location for the antenna but unfortunately, this location is a fair
distance from the end-user’s PC. As a result, I am unable to connect the antenna, EUM,
and the end-user’s PC using the cables included in the EUM kit. How can I resolve this
problem?
A: To connect the antenna cable, place the EUM closer to the antenna; then, use a longer
Ethernet cable to connect the EUM to your PC. Longer Ethernet cables are readily available
from local electronics shops.
NOTE: The use of a longer Ethernet cable has no effect on network
performance if you use a good quality cable and the cable length
is less than 100 meters.
Q: I have adequate radio signal strength, but cannot access the network. What should I
do?