MDS 05-2806A01, Rev. A MDS iNET 900 User’s Guide 93
4. Turn on the iNET’s transmitter.
(Main Menu>Diagnostic Tools>Radio Test>Test Mode>
TxKey> Enable)
User the space bar to key and unkey the transmitter ON and OFF.
(Enable/Disable)
5. Measure the forward and reflected power into the antenna system
and calculate the SWR and power output level. The output should
agree with the programmed value.
(Main Menu>Radio Configuration>RF Power Output)
6. Turn off Radio Test Mode at the Access Point and Remote.
(Main Menu>Diagnostic Tools>Radio Test>Test Mode>Disable)
End of procedure
4.2.2 Antenna Direction Optimization
Introduction
The MDS iNET 900 network integrity depends, in a large part, on stable
radio signal levels being received at each end of a data link. In general,
signal levels stronger than –77 dBm will provide the basis for reliable
communication that includes a 15 dB fade margin. As the distance
between the Access Point and Remotes increases, the influence of ter-
rain, foliage and man-made obstructions become more influential and
the use of directional antennas at Remote locations becomes necessary.
Directional antennas usually require some fine-tuning of their bearing to
optimize the received signal strength. The MDS iNET 900 unit 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 iNET Management System.
The measurement and antenna alignment process will usually take 10 or
more minutes at each iNET unit.
The path to the Management System menu item is shown in bold text
below each step of the procedure.
Procedure
1. Verify the iNET Remote is associated with an Access Point unit.
Observe the condition of the
LINK LED.
LINK LED = On or Blinking
This will indicate that you have an adequate signal level for the
measurements and it is safe to proceed.
To Next Page
Loading...
