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Author Topic: What digital mode is 10.129 Mhz  (Read 878 times)
KB3MDT
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Posts: 208




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« on: August 11, 2007, 07:05:22 PM »

Hi,
   Most nights I hear a strong signal on the 30 meter band at 10.129 USB.  10:00 PM (22:00) Eastern Daylight Time or 2:00 Universal Time.  Anyone know what type of signal it is?  I tried a couple of programs including Mixw and can't seem to decode it.  Thanks.

73
Ken
KB3MDT
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W7AIT
Member

Posts: 491




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« Reply #1 on: August 11, 2007, 10:39:45 PM »

PSK31 or RTTY.  You'll have to learn the difference on how they sound to determine which it is.  Try DIGIPAN and it'll decode if its PSK31.  Try MMTTY and it'll decode if its RTTY.
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AB2KT
Member

Posts: 62




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« Reply #2 on: August 11, 2007, 11:02:24 PM »

If it's that strong, there's a good chance it's not amateur at all. Possibly PACTOR, MIL-188-110A, or one of the STANAG digital varieties.

73
Frank
AB2KT/VE7
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K3WVU
Member

Posts: 491




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« Reply #3 on: August 12, 2007, 07:15:36 AM »

There are some very strong commercial signals on 30M.  I'm not sure about the frequency you're referring to, but there is a RTTY signal near there that I haven't been able to decode either.  It could be encrypted.

73

Dwight
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W4KPA
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Posts: 69




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« Reply #4 on: August 12, 2007, 07:47:39 AM »

I'm sure somebody on here can tell you exactly where and what the station is.  The signal sounds like RTTY.  We share this band with non-ham, fixed services in other countries.

Bruce
W4KPA  
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W7AIT
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Posts: 491




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« Reply #5 on: August 12, 2007, 01:00:08 PM »

I run RTTY & PSK31 and have made many RTTY and PSK31 QSO's on 30 meters around these frequencies.  

Yes there are commercial, military and foreign stations on the band too.  Those are often running a different shift on RTTY (something other than 170 hz), and will not decode unless I change to their shift frequency.  I do this trial and error.

I find when the other RTTY / PSK frequencies are shut down, activity on these modes increases on 30 meters and more likely to work somebody.
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N2NXZ
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Posts: 121


WWW

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« Reply #6 on: November 05, 2007, 05:10:52 PM »

If it is RTTY,Try 75 baud rate with 850hz shift on LSB.I usually get data unless it is encrypted.Usually this works on these freq`s >>>        

http://www.qsl.net/ve6bpr/hffax.htm
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N2NXZ
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Posts: 121


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« Reply #7 on: November 05, 2007, 05:14:03 PM »

FYI,
     10130.0 KHZ RBW 48 Murmansk Meteo RUS 120/576 90/576
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