At present I am using an single output unmodified LNB. I use it with 13 Volts for narrow band and 18 Volts for DATV. So my question is, if I built a Interdigital filter based at 744 MHz with a bandwidth of +/- 6Mhz to cover NB and WB would it actually make a difference with respect to SNR to me listening on NB?
I do not know if typically sampling at 1Mhz in SDR console sets the bandwidth or the total noise hitting the sdr receiver.
Any enlightenment appreciated.