MDS 05-2806A01, Rev. E.1
MDS iNET 900 Series User’s Guide
125
3. Set the transmit power to 30 dBm. (This setting does not affect the
output level during normal operation—only during Test Mode.)
(Main Menu>>Maintenance Menu>>Radio Test>>Test Mode>>Tx Power Out-
put)
4. Key the transmitter.
(Main Menu>>Maintenance Menu>>Radio Test>>Test Mode>>TxKey>>
Enable)
Use the PC’s spacebar 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>>Maintenance Menu>>Radio Test>>Test Mode>>Disable)
End of procedure
4.2.2 Antenna Aiming
Introduction
The radio 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 (–80 dBm for iNET II) provides
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 terrain, 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
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 measurement and antenna alignment process will usually take 10 or
more minutes at each radio unit.
The path to the Management System menu item is shown in bold text
below each step of the procedure.
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