It looks like I should
have known about not packing two receivers in the same band in the sme
box, but anyway, rf parts are not in the same box, and I intended to
keep them at the distance of arround 5 to 10 meters. Antenna of 434MHz
in is more or less conected directly do the pin, there just matching
cuircuit between. The 10.7 MHz out will be with 5 - 10 meters long cable
connected with USRP. Power supply of external frontend runs through
twisted pair of a UTP CAT 2 cable, which is kind of shielded, and I have
a few capacitors on the other end for filtering supply line. As for the
LP filter on the 10.7 MHz, i think that LFRX itself has cuoff frequency
of arround 50 MHz or so. Will it help a bit if I put some alu plates
over WBX board?