CR-SEH
CR-SEH
Figure 1 identifies the various connectors and LEDs of the CR-SEH.
Figure 1. CR-SEH Front Panel Diagram
The RF connection on the CR-SEH is the antenna connector on the top of the CR-SEH. 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 CR-SEH using RF cable to connect the CR-SEH
to the antenna. Cirronet does not recommend using RF cables longer than 5 feet. If more distance is
required between the CR-SEH and the antenna Cirronet recommends using the CR-SEHX. If the CR-
SEHX is not used, high-quality, low-loss RF feed line must be used.
Connectors
The 10/100BaseT Ethernet connector is the standard RJ-45 connector and is located on the bottom front
of the CR-SEH. The CR-SEH is set up to use a straight through cable to connect to a PC. If a straight
through cable is used to connect the CR-SEH to other devices through a hub, the CR-SEH must be
connected to the uplink port on the hub. A cross over Ethernet cable is also provided to connect to
downlink ports on a hub.
The SYNC IN and SYNC OUT signals are provided for special applications where multiple master CR-
SEHs 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 CR-SEHs must be designated as the sync
master. See the section
CR-SEH/Radio
Commands for details. If there are no co-located master CR-SEHs,
sync should be left disabled.
2000- 2004 Cirronet
Inc
3
M-2411-0013 Rev A
