Proxim Tsunami Multipoint MP-820-BSU-100 Installation Manual page 70

Blinking Green-Fast
Blinking Green
(5 times) and turns off
Green
Step 14: Align the Antenna
Antenna alignment is the process of physically aligning the antenna of the radio receiver and transmitter to have the best
possible link established between them. The antenna alignment process is usually performed during installation and after
major repairs. If you are installing external antennas, refer to the documentation that accompanies the antenna for
installation instructions.
The device has an audible antenna alignment tool that can be activated by plugging in the supplied RJ11 serial dongle. It is
audible upto 30 minutes. The CLI command enables both audible and numerical feedback as the CLI shows the running
Signal-to-Noise Ratio (SNR) values twice a second.
The output from the beeper for antenna alignment consists of short beeps with a variable interval. The interval changes with
the SNR level to assist in correctly aligning the antenna. An increase in signal level is indicated by a shorter interval between
beeps and a reduction in signal level results in beeps longer apart.
The alignment process averages the SNR, which is represented by an average length beep. When a higher SNR is received, the
beep period becomes shorter, A lower SNR results in a longer period between
When the antenna is aimed, the beep intuitively represents whether the SNR is rising or falling. The higher the SNR rises, the
shorter the period of the beep is heard and the higher the frequency of the beep.
When you change the position of the antenna, SNR averaging settles at the new value and the beeping returns to the
average length so the antenna can again be aimed for rising SNR.
Aiming is complete if moving in any direction results in a falling SNR value (which can be heard as longer periods between
beeps).
:
The range of the average SNR has been limited to values from 5 to 43; therefore, anything over 43 always results in a
short period between beeps and values below 5 always have a long period.
The Antenna Alignment Display (AAD) CLI output is disabled automatically 30 minutes after it is enabled to remove
the load of extra messages on the wireless interface. The default telnet time-out is 300 seconds (5 minutes).
®
Tsunami 800 and 8000 Series - Hardware Installation Guide
Power is ON and the Ethernet link on
Ethernet 2 is DOWN
Bootloader detected no image
Power is ON and the Ethernet link on
Ethernet 2 is UP
Figure 3-26 Beep Interval
8000 Series - Hardware Overview and Installation
Not Applicable
Not Applicable
Not Applicable
beeps.
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