RadioFrame Networks Inc DH2 사용자 설명서
Method of Procedure
System Description
System Description
10
RFN_3.1 Beta
connectors. These connectors are cabled to punch blocks to allow simple
installation of the remaining site alarm and control I/O.
installation of the remaining site alarm and control I/O.
Figure 3
Environmental Alarm System functional diagram.
2.1.1.2 GPS
Antennas
The Global Positioning System (GPS) antenna provides the timing reference to
the iSC-3. One GPS antenna with a dedicated 50ohm coax is required for each
iSC-3.
the iSC-3. One GPS antenna with a dedicated 50ohm coax is required for each
iSC-3.
Generally, the GPS antennas are to be mounted on a stable platform with a clear
view of the southern horizon and secured access. Horizontal separation of the
antennas is not required for proper operation; however, it is generally required to
increase survivability of the antenna from falling objects.
view of the southern horizon and secured access. Horizontal separation of the
antennas is not required for proper operation; however, it is generally required to
increase survivability of the antenna from falling objects.
GPS satellite acquisition and lock can be verified with a handheld GPS receiver
prior to installation. Four satellites should be available.
prior to installation. Four satellites should be available.