Date Code 20181001 SEL-3031 Instruction Manual
Job Done Examples
Configuring Collocated Antennas Using SEL Hop-Sync Technology
3.17
SEL-311C and SEL-3031 Settings at Location 1 and 2
The SEL-311C serial port needs to be set to MB8 MIRRORED BITS protocol. Follow the
job done Example 1 to configure the SEL-311C and the SEL-3031 radios located at
Location 1 and Location 2.
SEL-3031 Settings at Repeater Location
Set the two collocated SEL-3031 radios at the repeater location with settings similar to
the radios at Location 1 and 2. Set the radio at the Repeater location that is
communicating to Location 1 the same as the setting of the SEL-3031 at Location 2.
Do the same for SEL-3031 at the Repeater location communicating to Location 2 set
the same as the SEL-3031 at Location 1. This setup will start as two independent P2P
links. At the repeater location use an SEL-273A cable to connect Port 1 on each radio.
This setup should allow the repeater link to pass information to the next radio and the
relays should be communicating M
IRRORED BITS. This link will work adequately if the
repeater antennas are placed far enough apart to prevent the adjacent antenna from
interfering. To improve this link and to allow the antennas to be placed closer you will
need to synchronize the radios.
Synchronizing the Radios at the Repeater Location
To synchronize the system we need to synchronize the radios at the repeater location so
that the collocated radios transmit and receive at the same time. To do this you must
connect an SEL-273A cable between Port 3 of the radios at the repeater location. The
radios will use Pin 7 and Pin 8 in the communications cable to synchronize each other.
The last step to synchronizing radios is to set the SYNC setting in each of the radios at
the repeater location. You must make one radio the master SYNC SEND and the other
a master SYNC RECEIVE.
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