Re: [Discuss-gnuradio] 950-2150Mhz frontend

[Krzysztof Kamieniecki]

No helpful comments just more questions, and praise for your effort to design boards for us RF 
illiterates.

I'll refer to this spec to keep your websites "bandwidth" usage down.
http://www.sharpsma.com/sma/products/rf/pdf/102.pdf

The Sharp Module has this spec "Input signal level (dBm) –65 to –25"

What does the lower limit mean in the analog domain?

Here is an example based on my application:

The GPS spec states that the Minimum received signal power (L1 C/A) is -160dBW 
: -130dBm
+ a 40dB GPS Active Antenna                                                    
: -90dBm

Does this mean that the amplified GPS signal magnitude is 25dB below the maximum output of the tuner 
module, or 25dB below the noise floor of the module?

Thanks,


cfk wrote:
> I have a preliminary schematic and parts placement for a 950-2150Mhz 
> frontend daughterboard on my web site at 
> http://cfk.homelinux.com/gnuradio . If you just enter this link, there 
> is a whole directory of files relating to three front ends. The files 
> with '4702' in them relate to the first frontend for 45-850Mhz of which 
> 6 boards were made. The second group of files have 'fedbs' in their 
> names. These files pertain to the Sharp '1204 module which is a DBS 
> 950-2150Mhz module. The third group are 'really' preliminary and 
> contemplate a Maxim 80211 chip.
>  
> One the 950-2150Mhz frontend, which 'might' be interesting to GPS is a 
> schematic is in two parts, the first is 
> http://cfk.homelinux.com/gnuradio/fedbs_1.pdf and the second page is 
> http://cfk.homelinux.com/gnuradio/fedbs_2.pdf
>  
> Perhaps Brian, Krzyztof and others might comment on it so we can get it 
> as useful as possible to the group.
>  
> Charles
>
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> Discuss-gnuradio mailing list
> address@hidden
> http://mail.gnu.org/mailman/listinfo/discuss-gnuradio

--
Krzysztof Kamieniecki
callsign:KB1KLB
mailto:address@hidden