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TracVision 4 Installation and Technical Manual
2.3.6.1
Connecting the Antenna RF Signal
Cables to a Multiswitch (North
American Systems Only)
Due to the signal polarization of the North American satellites, it
is possible for TracVision 4 to support more than two IRDs
aboard a vessel. To install more than two IRD/TV pairs, an active
multiswitch (Channel Master model 6214IFD or equivalent) is
placed between the Antenna Unit and the IRDs. The following
sections provide details for both a single multiswitch and a
multiple multiswitch installation.
Some multiswitches (either active
or passive), such as the Channel
Master model 6214IFD, may
interfere with the 22 KHz tone sent
by DSS Plus™ IRDs to the
antenna. As a result, the antenna
may not receive the signal to
change satellites when you change
channels using your DSS Plus
remote. In this case, you will need
to use the maintenance port
satellite switch procedure explained
in Section 2.5.1, “Installing Your
Selected Satellites.”
2-12
Multiswitch Installation for 3-4 IRD/TV Pairs
Figure 2-14 (on next page) illustrates typical wiring arrangements
for three or four IRDs. Mount the multiswitch unit in accordance
with the manufacturer’s instruction sheet.
1. Connect the RF cable tagged "RF1" to the
multiswitch input labeled "LNB RHCP +13V".
2. Connect a second RF cable to the antenna unit’s
RF2 plug and to the multiswitch input labeled
"LNB LHCP +18V".
3. Connect the multiswitch outputs to individual IRD
inputs. Use RG-6 cable terminated with F-type
connectors for all RF connections. Terminate all
unused output connectors with 75 ohm DC blocks
(Channel Master #7184, Radio Shack #15-1259 or
equivalent).