User's Manual

MDS 05-6302A01, Rev. A MDS Mercury 16E Technical Manual 47
the received signal strength. The transceiver has a built-in received
signal strength indicator (RSSI) that can be used to tell you when the
antenna is in a position that provides the optimum received signal.
RSSI measurements and Wireless Packet Statistics are based on mul-
tiple samples over a period of several seconds. The average of these
measurements will be displayed by the Management System.
The path to the Management System menu item is shown in bold text
below each step of the procedure.
Procedure 1. Verify that the Subscriber is associated with the Base Unit unit by
observing that the LINK LED is on or blinking).
2. View and record the Packets Dropped and Receive Errors on the
LAN1/LAN2 Statistics window. This information will be used later.
3. Clear the
LAN1/LAN2 Statistics.
4. Read the RSSI level at the Subscriber Unit.
(Maintenance & Status>>Performance>>RSSI)
5. Optimize RSSI (less negative indicates a stronger signal) by slowly
adjusting the direction of the antenna. Watch the RSSI for several
seconds after making each adjustment so that it accurately reflects
any change in the link signal strength.
6. Once RSSI is optimized, view the Packets Dropped and Receive
Error rates. They should be the same or lower than the previous
(recorded) readings.
If the RSSI peak results in an increase in the Wireless Packets
Dropped and Received Error, the antenna may be aimed at an unde-
sired signal source. Try a different antenna orientation.
End of procedure.
7.0 dBm-WATTS-VOLTS CONVERSION
CHART
Table 7-1 is provided as a convenience for determining the equivalent
voltage or wattage of an RF power expressed in dBm.
Table 7-1. dBm-Watts-Volts conversion—for 50 ohm systems