Re: FMSCAN userlist for Perseus with comlete LW/MW/SW and dB values
- Hi, Bernd,
the values are dBm and they are negative. I just left away the "-"
because of the narrow format - every character counts.
The reference is a Perseus with an ALA1530S magnetic loop antenna and
50m standard coax cable (RG58) as I have it here. You can add an
overall gain/loss before downloading the list.
But still the prediction needs a lot of improvement - that's what I'm
working on at the moment. It works quite fine on MW for stations at
night up to 3000 km. Everything else is just a rough guess. The
difficulty on SW are the broadcasts with varying signal strengths over
longer time periods.
> first all thank you fort his super list!
> One question: How can I interpret the dB-values? I understand that
> values mean weaker signals but on what basis?
> Is it dBm then it should be negative values, is it dBµV then stronger
> signals would mean greater values .
> Can anybody explain?
> Bernd, DF9RB
--- In perseus_SDR@yahoogroups.com, "Wiesgickl" <wiesgickl@...> wrote:
... One question: How can I interpret the dB-values? I understand
that smaller values mean weaker signals but on what basis?
Bernd, try to use GOOGLE with 'dBm table' or dBm value' and you will
find tons of explanations for this.
- ... some more bugfixes:
- no special characters codes (like #&316;) anymore, now replaced by
- no '????' for on-time and off-time anymore (these stations were not
shown by the Perseus)
- '0' in the power column is left away (where power is unknown)
- Some improvements for the Perseus userlist on fmscan.org again:
- summer schedule update (since April)
- many corrected station names
- fewer double entries (only left where different sources contain conflicting data)
The list is full range LW/MW/SW and combines HFCC, Eibi, TBL and some manual editing.
It also includes beacons (by RWW), many offsets (exact frequencies by 1/10 Hz) for LW/MW and a signal strength prediction for the receiver's location (stations listed from strongest to weakest on each frequency).
- the winter schedule is now ready for downloading. The userlist is now 100% fed by AMLIST , main sources are still EiBi, TBL and HFCC. Changes in AMLIST will be visible immediately in the generated userlist.
--- In perseus_SDR@yahoogroups.com, "peeraxel" <peeraxel@...> wrote:
> The list is full range LW/MW/SW and combines HFCC, Eibi, TBL and some
> manual editing.
> It also includes beacons (by RWW), many offsets (exact frequencies by
> 1/10 Hz) for LW/MW and a signal strength prediction for the receiver's
> location (stations listed from strongest to weakest on each frequency).
> http://fmscan.org/perseus.php <http://fmscan.org/perseus.php>
> Have fun!