05-2806A01, Rev. L
MDS iNET Series Reference Manual
115
Procedure
1. Place a directional wattmeter between the
ANTENNA
connector and the antenna system.
2. Place the transceiver into the Radio Test Mode using the menu sequence below:
(Main Menu>>Maintenance/Tools Menu>>Radio Test>>Test Mode>>Y>>ON)
NOTE:
The Test Mode has a 10-minute timer, after which it will return the radio to normal operation. The
Radio Test Mode can be terminated manually by selecting
OFF
on the menu or temporarily
disconnecting the radio’s DC power.
3. Set the transmit power to 30 dBm. (This setting does not affect the output level during normal opera-
tion—only during Test Mode.)
(Main Menu>>Maintenance/Tools Menu>>Radio Test>>Test Mode>>Tx Power Output)
4. Key the transmitter.
(Main Menu>>Maintenance/Tools 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/Tools 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 multiple 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.
Procedure
1. Verify the Remote transceiver is associated with an Access Point unit by observing the condition of the
LINK
LED (
LINK LED = On or Blinking
). This indicates that you have an adequate signal level for the
measurements and it is safe to proceed.
Summary of Contents for MDS iNET Series
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