SatSig topic:

PLL LNB with C band interference rejection filter ?

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Jun 21^st, 2013 at 2:10pm

Hi all,
I am looking for a C-band (3.7 to 4.2 GHz) PLL LNB with LO frequency stability of up to 10KHz with a built-in BPF. I need the LNB for a system with beacon receiver. There is a WiMax transmission carrier in 3.5GHz nearby the receiving antenna.
A stand alone BPF reduces the WiMax signal significantly but at the same time reduces the C/N of the service signal by 2dB.
The carrier I wish to decode is in the range of 4100MHz.

Norsat offers the 8000R, but it is a DRO LNB with poor LO frequency stability.

any idea?

Regards,

Agor

Jun 24^th, 2013 at 2:42pm

The NJS8487 from NJR should do what you want, it only receieves in the band from 3.625 to 4.2 GHz. https://mc.njr.co.jp/eng/products/vsat/c-lna_lnb.html

Jun 24^th, 2013 at 8:38pm

Thanks.
However, looking at the specsheet there is no trace of filter that blocks 3.4-3.625GHz signals or suppresses them.
Do you have experience with the LNB in blocking extended C-band interferences?

Regards,

Agor