Frank,
On 09/19/2010 09:35 AM, francesco messineo wrote:
Hi
On 9/19/10, Bob Camp<li...@rtty.us> wrote:
Hi
Is -195 dbc/Hz floor good enough or is it overkill?
I'd say this is obviously overkill, -160 dBc/Hz could be a good compromise.
Is -155 dbc/Hz at 100 Hz offset a requirement or is -40 dbc ok?
-40 dBc/Hz at 100 Hz is about useless, -150 dBc/Hz at 100 Hz is again
a good compromise, the lower (practically) the better.
Do you *really* need -150 dBc/Hz? That is a hard requirement!
It's hard to explain why to ones not familiar with weak signal
operation between broadcasting signals, but really the noise floor
raise a lot when you have some 5 or 6 broadcasts signals in 500 KHz of
band (all with power levels of at least 10 dB more than the levels
used in amateur radio, often +20 dB more)
I would need some more fundamental understanding of the system and needs
to be able to understand how you come up with the above noise level at
100 Hz.
Cheers.
Magnus
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