LRS-455-EU Data Transceiver Users Manual
LUM0032AA Rev A
Version 1.0
22
Ideally, noise levels should be below -120 dBm units and the difference between the average signal level
and average noise level should be 26 dB or more. Noise levels significantly higher than this are an
indication of a high level of interference that may degrade the performance of the link. High noise levels
can often be mitigated with band pass filters, antenna placement or antenna polarization.
A
VERAGE
S
IGNAL
L
EVEL
The average signal level indicates the level of received signal at this transceiver. For each of these, the
signal source is the transceiver that transmits to it. The number is an average of the received signal levels
measured at each frequency in the transceiver's frequency hop table. The individual measurement values
at each frequency hop channel are shown in the frequency table. Pressing the
Enter
key when the Radio
Statistics menu is displayed accesses the frequency table. For a reliable link, the margin should be at
least 26 dB. Low Average Signal Levels can often be corrected with higher gain antennas and better
antenna placement.
Note:
Please consult the install manual for antenna and FCC requirements.
O
VERALL
R
CV
R
ATE
(%)
The Overall Receive Rate measures the percentage of data packets that were successfully transmitted
from the Master to the Slave on the first attempt. A number of 75 or higher indicates a robust link that will
provide very good performance even at high data transmission rates. A number of 15 or lower indicates a
weak or marginal link that will provide lower data throughput.
R
ADIO
T
EMPERATURE
The Radio Temperature value is the current operating temperature of the transceiver in degrees Celsius.
For proper operation, a FreeWave transceiver must be in the temperature range of -30° to +60° C.
