SEL-3031 Instruction Manual Date Code 20181001
Settings and Commands
Settings
4.14
it may be because of obstacles in the way or improper antenna alignment. Issue another
RADio C command and let the SEL-3031 run for another day then verify that the
availability has increased. See Section 5: Performance Monitoring, Testing,
and Troubleshooting for more information on how to use the SKIP setting.
TXPWR sets the transmitted power of the SEL-3031. The available range is
20–30 dBm (1 W). The radio transmit power is set in 1 dBm increments. The radio is
shipped with a factory-default setting of 30 dBm. This setting must be used to reduce
the power output if the total effective isotropically radiated power (EIRP) exceeds
36 dBm. See Transmitted Signal on page 2.3 for more information on how to calculate
and configure the maximum power output.
In the United States and Canada, the FCC and IC regulate the amount of power a radio
can radiate with EIRP. The EIRP limit of radiation is 36 dBm. This value includes the
power of the transmitter, cable losses, and antenna gain. If you exceed the allowed
36 dBm, you must lower the transmitted power of the radio by using the TXPWR
setting, and then measure the actual power.
See Transmitted Signal on page 2.3 for more information on determining and properly
setting the TXPWR setting.
SYNC is used when more than one radio network exists with collocated antennas. The
SYNC setting allows you to connect two or more radios together, enabling the radios to
synchronize their hop sequences through the use of SEL Hop-Sync technology. SEL
Hop-Sync technology synchronizes the hop sequence giving a much higher radio
availability and dependability by removing adjacent antenna interference. The
synchronizing allows you to install multiple antennas on the same pole and greatly
reduce adjacent noise interference.
For all the collocated radios the MODE setting needs to be set as MASTER. One of the
MASTER radios you set the SYNC to SEND and all of the other MASTER radios you
set the SYNC to RECEIVE. You do not need to set the SYNC for the radios on the
other end of the link. You only need to set the SYNC setting for the collocated radios.
See Collocated Antenna Systems on page 2.8 for more information on properly cabling
and using SEL Hop-Sync technology. For SEL Hop-Sync technology to properly work,
each radio at the collocated site must have the SYNC settings set correctly and a cable
on Port 3 connecting all the collocated radios.
The KEY setting is only available if the product contains an SEL-3044 Encryption
Card. The KEY setting is a passphrase that is used to generate an encryption key. The
acceptable range is from 8 to 80 characters. All printable characters are accepted. If
you have an encryption card, this value must be set to enable the secure wireless
connection. If MODE equals P2MP then the DEVADDR and RADIOLST must be set
with the KEY setting to allow a master to talk to multiple remotes. If MODE is set to
P2P then only the KEY setting is needed. When the SEL-3031 is shipped with the
encryption card, or added in the field, it is by default shipped in reset mode. The SEC
LED on the front panel will flash green to show this state. The KEY setting must be set
to activate the encryption card. The SEL-3031 radios will not transmit data until the
SEL-3044 is set properly. The SEC LED will illuminate green when the KEY setting is
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