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SEM2411
Figure 3. SEM2411D Front Panel Diagram
Connectors
The RF connection on the SEM2411 is the antenna or short RF cable that connects on the rear
panel of the SEM2411. The antenna connector is a reverse TNC type connector. An antenna may
be connected directly to this connector. Alternatively, an antenna may be located away from the
SEM using RF cable to connect the SEM to the antenna. Cirronet does not recommend using RF
cables longer than 5 feet. If more distance is required between the SEM and the antenna Cirronet
recommends using the SEM2411X. If the SEM2411X is not used, high-quality, low-loss RF feed
line must be used.
The 10/100BaseT Ethernet connector is the standard RJ-45 connector and is located on the rear
of the SEM. The SEM is set up to use a straight through cable to connect to a PC. If a straight
through cable is used to connect the SEM to other devices through a hub, the SEM must be
connected to the uplink port on the hub.
The SYNC IN and SYNC OUT signals are provided for special applications where multiple
master SEMs are co-located. The synchronizing signals are RS-485 levels and may be connected
using an RJ-11 connector. If the sync signals are required, one of the master SEMs must be
designated as the sync master. See the section
SEM/Radio
Commands for details. If there are no
co-located master SEMs, sync should be left disabled.
The Console port is an RS-232 serial port that may be used to configure the SEM. Connection to
this port is made with the 9-pin to RJ-11 serial cable included with the SEM. This is useful when
2000- 2004 Cirronet
Inc
4
M-2411-0007 Rev B
Summary of Contents for SEM2411 /SEM2411 X
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