Gabriel and ALL
avoid confusions will be nice if we specified MAP65 or MAP65-IQ in our
references, and not simple MAP65 for both softwareâs.
works with adaptive polarization and MAP65-IQ not, to avoid confusion
regarding the software version is good to start from the beginning making
clear differences between both version, in essential both works decoding JT65
BUT MAP65-IQ is the little brother for single channel IQ receptors when MAP65
is for dual RX IQ channels with Adaptive polarization.
de Alex, HB9DRI
linrad@xxxxxxxxxxxxxxxx [mailto:linrad@xxxxxxxxxxxxxxxx] On Behalf Of
Gabriel - EA6VQ
Sent: Samstag, 28. MÃrz 2009 14:09
linrad@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx: [Linrad] First real EME tests with
I spent several hours playing with the new version r1102, and using the
default configuration of Linrad provided with that version. This is the
first time I have managed to decode signals using MAP65 and I must say the
first impression is excellent, however I have noticed several things
possibly not working as good as I could expect, at least with
the signal levels reported for the selected frequency are between 3 and 5 dB
weaker than with WSJT6. I was running MAP65 and WSJT6 in parallel and I
could see that difference for all signals. When a signal is, for instance, -22
dB in WSJT6, the same signal is between -25 and -27 dB in MAP65.
When the band is noisy the difference is smaller (might be 1 dB weaker in
MAP65), possibly because of the excellent noise blanker of Linrad.
weaker signals (-28 to -30 dB in WSJT6) are not decoded at all in MAP65 (and
they are in WSJT6)
the reception of MAP65-IQ suddenly stops. The waterfall display does not
update and the program doesn't decode, although apparently it continues
receiving data from Linrad (at least it does not show "no data" or so).
When I double click on the waterfall it starts receiving again. This has
happened at least 5 times in about 2 hours.
near the moonset the band was really noisy and I noticed that some signals
that were clearly visible in Linrad's waterfall were not visible at all in
MAP65's waterfall, and it did not decode them either. Anyway this was
only in very noisy conditions, due to power lines. (Joe, I have some
screenshots of these last 2 situations, and I will E-Mail them to
3.1 (build 56): HTTP://www.vqlog.com
Propagation maps: HTTP://www.vhfdx.net/spots/map.php