|
For those interested, the slowWSPR utilities
can be downloaded at
There is a readme file which will hopefully give
you an idea of how to proceed. But beware, this is all very improvised, please
don't expect plug and play...
Best 73,
Markus (DF6NM)
Sent: Friday, September 21, 2012 2:07 AM
Subject: WSPR-8 Test
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
2012-09-20 23:44 DK7FC 0.137508
-4 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)
| 