View Received Signal Strength (Rssi) - GE MDS SD Series Reference Manual

Setting LBT Timeout
and Packet Action
Setting the LBT
Clear Channel
Threshold
MDS 05-4846A01, Rev. C
1. Select the desired menu item (
The field to the right of the item clears and a flashing cursor
appears.
2. Enter the desired wait time(s) in milliseconds and press the
key to apply the change.
The LBT menu provides a setting for the maximum time to wait (in mil-
liseconds) for the channel to become free, referred to as
the menu. When this time is exceeded, the radio follows the action
defined in the
Packet Action on Timeout
To change the timeout setting, proceed as follows:
1. Select
Timeout (MS)
clears and a flashing cursor appears.
2. Enter the desired timeout time in milliseconds and press the
key to apply the change.
A related setting to
Timeout
mines what to do with a packet once the timeout period has expired and
the channel is still not available. If set to
set to , transmission of the packet is attempted despite the channel
Send
being busy.
LBT works by sensing the presence of a carrier signal on the radio's
operating frequency. If a carrier is present, transmission is inhibited. The
setting allows a threshold to be set which, when
Clear Channel RSSI
equaled or exceeded, declares the channel busy and therefore unavail-
able for transmitting.
Proceed as follows to set the
1. Select
Clear Channel RSSI
item clears and a flashing cursor appears.
2. Enter the desired signal threshold (in dBm) to specify the level at
which a busy channel is declared. Press

View Received Signal Strength (RSSI)

The radio's built-in Received Signal Strength Indication (RSSI) is
helpful for aligning directional antennas for best receiving performance,
and for checking the quality of an incoming signal. This parameter is
available on the Radio Performance Menu (Figure 38). The reading is
expressed in dBm, thus the less negative the number, the stronger the
signal (i.e., a -70 dBm signal is stronger than a -80 dBm signal).
NOTE: The RSSI facility limits the maximum displayed signal strength to –60
dBm.
SD Series Ref. Manual (Packet & Transparent Mode)
Min Channel Wait
menu setting (either
from the menu. The field to the right of the item
is
Packet Action on Timeout
Drop
Clear Channel RSSI
from the menu. The field to the right of the
ENTER
or
Max Channel Wait
ENTER
Timeout (MS)
or
Drop Send
ENTER
. This setting deter-
, the packet is discarded. If
parameter:
to apply the change.
).
on
).
49