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05-2806A01, Rev. H
iNET Series Reference Manual
57
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Figure 2-28. Auto Data Rate Submenu
•
ADR RSSI Threshold—
A specified received signal strength
value, which, if exceeded by the range of the
RSSI Delta
set-
ting, causes a data rate change in the transceiver. [
-50 to -100;
-87 dBm
]
•
ADR RSSI Delta—
A user-specified
difference
from the
RSSI
Threshold
figure which, if exceeded, causes a data rate change
in the transceiver. [
0-10; 5
]
•
ADR SNR Threshold—
A user-specified signal-to-noise ratio,
which, if exceeded by the range of the
SNR Delta
setting,
causes a data rate change in the transceiver. [
10-30; 26
]
•
ADR SNR Delta—
A user-specified
difference
from the
SNR
Threshold
figure which, if exceeded, causes a data rate change
in the transceiver. [
0-10; 2
]
NOTE:
In the description below, “high speed” refers to 512 kbps for
the iNET radio and 1 Mbps for the iNET-II radio.
“Standard speed” refers to 256 kbps for the iNET radio and
512 kbps for the iNET-II.
Using the example of Figure 2-28, assume the current RSSI is -87 dBm.
An RSSI reduction of more than 5 dBm (more negative RSSI number)
would cause a data rate change from high speed to standard speed. Once
the data speed has changed to standard speed, an RSSI
increase
to the
level of -82 dBm would be required for the radio to switch back to high
speed. This provides an operational “window” or hysteresis range over
which the data speed stays constant despite minor changes in signal
strength.
Содержание MDS iNET 900
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