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Orbital
Research's Diplexer (10 MHz inserter, is really
just one version of its MuxTee -
a six in one combination all-purpose tool.
It may not slice and dice, but it will act
as a Diplexer ( combining a 10 MHz
reference signal and L-Band output into one
feed to an LNB or BUC ), or as a BiasTee
( inserting and filtering external DC to the
L-Band signal for the LNB or BUC ), or as a
MuxTee ( that combines
the external DC insertion of a BiasTee with
the ability to multiplex an inserted 10 MHz
reference source of a
Diplexer ). That accounts for three
functions - if the Diplexer/BiasTee/Multiplexer
is reversed, it can be used to extract the
10 MHz reference, or
DC power, or both.
In addition, it comes in standard
and high power versions.
In its function as
a Diplexer, it becomes a
System Interface Product (SIP), that combines a 10
MHz reference signal and L-Band output into one feed
to an LNB or BUC. The Diplexer ensures low
insertion loss, but high port-to-port
isolation. Lock your BUC or LNB with the filtered
diplexer. Puts the 10 MHz reference signal out
to the LNB or BUC to lock it, and passes and filters
the L-Band signal on the same line from the LNB or
to the BUC.
The unused connectors do not
need to be terminated and are 'O' ring
sealed.
Why do
this?
You might think
you could take a splitter and feed the 10MHz in one
port and the L-Band in the other port and you would
have a combined L-Band and 10 MHz signal.
First, while the splitter looses 3 dB, the Diplexer
looses 0.3 dB of the 10 MHz to the LNB.
Second, the L-Band signal through the splitter
looses 3.5 dB, while the Diplexer looses less than
0.5 dB. Third, the 10 MHz signal is from one
thousand to one hundred thousand times stronger than
the l-Band signal. The 10 MHz signal will go
through the splitter, back to the receiver / modem,
loosing only about 8 dB - this means that at the
receiver, the 10 MHz signal is still 1000 times
stronger than the L-Band signal. The Diplexer
loses 90 dB at 10 MHz, and guarantees that the 10
MHz signal will be much less than the L-Band signal
at the receiver / modem. |
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