[hpsdr] 100D Noise Figure?

[Helmut, DC6NY]

Hi Clyde,

correction: total 18.5 dB is ok for NF = 34 dB ADC, but worst case total 24
dB for NF = 40 dB ADC. 

73, Helmut, DC6NY


-----Ursprüngliche Nachricht-----
Von: hpsdr-bounces at lists.openhpsdr.org
[mailto:hpsdr-bounces at lists.openhpsdr.org] Im Auftrag von Helmut, DC6NY
Gesendet: Freitag, 31. Mai 2013 15:49
An: 'Clyde Washburn'; hpsdr at lists.openhpsdr.org
Betreff: Re: [hpsdr] 100D Noise Figure?

***** High Performance Software Defined Radio Discussion List *****

Hi Clyde,

As far as I know is the Angelia frontend identical to that of Hermes: The
chain, attenuator DAT-31 (set to zero means just insertion loss) of 1.9 dB +
2 dB loss of the antialiasing  filter + Preamp LTC 6400 (  NF=6.2 dB, gain =
20 dB) + ADC LTC 2208 (NF approx. 40 dB) results in a total noise figure
around 18.5 dB. That’s the reason why a preamp on 6m should be used.

73, Helmut, DC6NY

-----Ursprüngliche Nachricht-----
Von: hpsdr-bounces at lists.openhpsdr.org
[mailto:hpsdr-bounces at lists.openhpsdr.org] Im Auftrag von Clyde Washburn
Gesendet: Freitag, 31. Mai 2013 15:03
An: hpsdr at lists.openhpsdr.org
Betreff: [hpsdr] 100D Noise Figure?

***** High Performance Software Defined Radio Discussion List *****


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