First decodes using 8-minute
WSPR:
|
2012-09-21 00:00
|
DK7FC
|
0.137508
|
+7
|
0
|
JN49ik
|
1
|
DF6NM
|
JN59nj
|
175
|
91
|
|
2012-09-20 23:52
|
DK7FC
|
0.137508
|
+3
|
0
|
JN49ik
|
1
|
DF6NM
|
JN59nj
|
175
|
91
|
Between 23:36 and 23:43:20,
Stefan was transmitting 8-times slow WSPR with low power on
136172 Hz. This was recorded here to an IQ file using SndInput
from DL4YHF, and replayed 8x fast during the next 2-minute,
slot starting 23:44. In the process the audio was frequency
shifted from 670 to 2000 Hz, and added to the normal audio
data for WSPR. Thus with the 4x acceleration, Stefan's
transmission appeared 8 instead of 2 Hz above center.
This is all still a bit
improvised, but the concept seems to work.
Best 73,
Markus (DF6NM)
No virus
found in this message.
Checked by AVG - www.avg.com
Version: 2012.0.2221 / Virus Database: 2441/5282 - Release Date:
09/20/12
