Dear LF,
Has anyone any ideas or suggestions on a resource
for calculation of a link budget for WSPR over a set
distance?
As it seems I can get up to GM4SLV reasonably
consistently on my current antenna/power setting with a SNR of around -22dB
and the limit for WSPR is around -30dB then is there a means for roughly
estimating or indeed accurately calculating the Expected Max Range (EMR) at
that power setting and antenna configuration?
Clearly, there are differences between separate Rx
stations but if one knows the ratio between two or more Rx stations then it
should be possible to pro-rate or estimate at least the signal strength at a
given Rx based on its performance with other known
signals.
If I can do 916km with an SNR of say -22dB then how
much further would the remaining 8dB or so of WSPR detection get me,
assuming the other Rx has the same capability as GM4SLV and if their
capability is different, then is it fine to factor for the dB difference
over known paths/signals?
Thanks in advance for any answers or pointers and
best wishes to all for a great 2010
With best
regards
Jim
Dr. James Cowburn
G7NKS
E
[email protected]
