J8 - Rf Input - RESEARCH CONCEPTS RC4000 User Manual

RC4000 ACU Boardset Chapter 2 Hardware

2.1.2.4.8 J8 - RF Input

Designation PCB Pin Count Connector Type #
J8 "RF In" 2 SMB 11
J8 (50 ohm) accepts the output of an LNB (950-2150MHZ, -50 to –5dBm.).
Internally, this input goes through three splitters (3 dB each.) After the first splitter, it provides an output
at J16 "Out Pass" that also allows DC pass-through (for applications required to power the LNB) and also
allows a 10MHz pass-through. The second splitter provides an output at J18 "Out". This output typically
supplies RF to the DVB-S2 carrier board when installed or can optionally route RF to an internal beacon
receiver or spectrum analyzer. The third splitter also provides an output at J17 "Out" and routes the RF
signal to the on-board L-Band power detector module. The L-Band power detector produces an output
proportional to the broadband energy received. When this input is being used, it is indicated on RC4000
screens as the "RF" signal source. See sections 4.1.11.1 and 3.3.1.2.9 regarding use of the L-Band
power detector input.
The RF autopeak circuitry includes a "DC block".
Connectors J8, J16, J17 and J18 are SMB connectors.
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