Hi folks!!
Following the idea to compare different DSC decoders, i've spent my insomnia time monitoring 2.187,5 khz.
(More and useful infos about this system: (http://www.gmdss.com.au/dsc.html)
Here my personal results.
DSC decoders used:
Krypto 500
Code 300-32
YAdD
Wavecom WCode (to be added)
Receiver:
Perseus with the same audio (coming from Vac) to all the decoders.
Each decoder set to the 1700 rtty note pitch of Perseus.
Troubles:
Code 300-32 ( my version) not really working with W7_64bit. Decided to try VirtualBox engine to run WinXp with Code 300-32. Surprising, it worked in a flawless mode catching the Virtual audio from my Perseus with its virual soundcard.
Example of decoded outputs for the same message:
Krypto500
output:
[DSC
04/01/2014 03:09] [Local time]
Format:
Individual
Category:
Safety
Destination:
MMSI 636092531
Originator:
MMSI 373005000
First
Telecommand: Test Request
Second
Telecommand: No Information
EOS:
RQ
[CRC
GOOD]
Code
300-32 output: [Local time]
FORMAT
SPECIFIER: SELCALL individual
CALLED
PARTY ADDRESS: 636092531 Liberia
CATEGORY:
SAFETY
SELF
IDENTIFICATION: 373005000 Liberia
TELECOMMAND:
TEST
RECEIVE
FREQUENCY/CHANNEL INFORMATION NOT INCLUDED
TRANSMIT
FREQUENCY/CHANNEL INFORMATION NOT INCLUDED
RQ
CHECK
SUM ERROR
DECODED
AT: 3.09.51 04/01/2014
YaDD
output (from its log section):
2014-01-04
02:09:50 [UTC correct
time] 2187.5 373005000 , , -- Km [not
set my position]
RX:2187.5
SYMB:
120 120 063 060 092 053 010 108 037 030 005 000 000 118 126 126 126
126 126 ~~~
126
117 055 117 ~~~
TC1:TEST
TC2:NOINF FREQ:-- POS: -- EOS: REQ ECC: 73 ERR
Results:
Here (Decoding differencies) you can download a face to face little race between Code 300-32 and Krypto 500. There are some entries missing on both sides due to the noise disturbing reception. I'm planning soon a new test with all the outputs presented together adding W-Code to the decoding software.
Here (DSC_Log) the Code 300-32 complete log of the night.
