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#1
November 19th 06, 04:10 AM
posted to rec.radio.shortwave
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What is this signal on 4.005 MHz?
I'm hearing a strong digital signal of some sort when my radio is in CW
mode, on 4.005 MHz in north Texas during the evening hours. Sounds like high-speed Morse code. I've done a web search with no luck, except that Vatican Radio supposedly transmits on that frequency. Any idea what this is and where it's coming from? Thanks! Matt J. McCullar, KJ5BA Arlington, TX |
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#2
November 19th 06, 04:17 AM
posted to rec.radio.shortwave
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What is this signal on 4.005 MHz?
Its RTTY at 75 baud,
Think its from a news source....I'd pinpoint it for you but dont have my Kantronics KAM XL hooked up right now. "Matt J. McCullar" wrote in message . net... I'm hearing a strong digital signal of some sort when my radio is in CW mode, on 4.005 MHz in north Texas during the evening hours. Sounds like high-speed Morse code. I've done a web search with no luck, except that Vatican Radio supposedly transmits on that frequency. Any idea what this is and where it's coming from? Thanks! Matt J. McCullar, KJ5BA Arlington, TX |
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#3
November 19th 06, 04:18 AM
posted to rec.radio.shortwave
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What is this signal on 4.005 MHz?
Matt J. McCullar wrote:
I'm hearing a strong digital signal of some sort when my radio is in CW mode, on 4.005 MHz in north Texas during the evening hours. Sounds like high-speed Morse code. I've done a web search with no luck, except that Vatican Radio supposedly transmits on that frequency. Any idea what this is and where it's coming from? Thanks! Matt J. McCullar, KJ5BA Arlington, TX I'm receiving it in Calgary, Albert Canada also. S2 to S3 with lots of background hiss. It's almost like a cross between radio teletype and morse but that may be due to muting by the noise. 03:17 GMT Kenwood R2000 100 ft north south wire antenna mike |
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#4
November 19th 06, 04:59 AM
posted to rec.radio.shortwave
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What is this signal on 4.005 MHz?
Rayburn wrote:
Its RTTY at 75 baud, Think its from a news source....I'd pinpoint it for you but dont have my Kantronics KAM XL hooked up right now. "Matt J. McCullar" wrote in message . net... I'm hearing a strong digital signal of some sort when my radio is in CW mode, on 4.005 MHz in north Texas during the evening hours. Sounds like high-speed Morse code. I've done a web search with no luck, except that Vatican Radio supposedly transmits on that frequency. Any idea what this is and where it's coming from? Thanks! Matt J. McCullar, KJ5BA Arlington, TX Its coming in s9 and over in Austin. I'm trying to decode it with LinPSK Software for Linux, but no such luck. I'm new to the data modes and so far the only thing I can successfully decode is ham rtty. Is there something else going on with this feed, encryption maybe? Also, I don't have the ability to set the baud rate with this software. Should that matter? Thanks - - Matt -- Posted via a free Usenet account from http://www.teranews.com |
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#5
November 19th 06, 06:17 AM
posted to rec.radio.shortwave
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What is this signal on 4.005 MHz?
"Matt J. McCullar" wrote in message . net... I'm hearing a strong digital signal of some sort when my radio is in CW mode, on 4.005 MHz in north Texas during the evening hours. Sounds like high-speed Morse code. I've done a web search with no luck, except that Vatican Radio supposedly transmits on that frequency. Any idea what this is and where it's coming from? Thanks! Matt J. McCullar, KJ5BA Arlington, TX It is FSK (like RTTY). It is 850 Hz shift, 75 Baud. It is s9+10 in southern California at 0400 UTC. There are commercial and military signals like this. Typically, if it is commercial, the frequency will pop up if you google it. Assuming you googled thoroughly, it is probably military. There are a dozen or more other stations like it across the HF band (commercial and mil). They aren't ASCII. They aren't Baudot. -- rb |
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#6
November 19th 06, 09:25 PM
posted to rec.radio.shortwave
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What is this signal on 4.005 MHz?
You have to be able to change the shift to a wide shift (850 hz) instead of
the narow shift found in the amateur bands. you have to be able to adjust the baud rate in the program . "Radio TexMex" wrote in message .. . Rayburn wrote: Its RTTY at 75 baud, Think its from a news source....I'd pinpoint it for you but dont have my Kantronics KAM XL hooked up right now. "Matt J. McCullar" wrote in message . net... I'm hearing a strong digital signal of some sort when my radio is in CW mode, on 4.005 MHz in north Texas during the evening hours. Sounds like high-speed Morse code. I've done a web search with no luck, except that Vatican Radio supposedly transmits on that frequency. Any idea what this is and where it's coming from? Thanks! Matt J. McCullar, KJ5BA Arlington, TX Its coming in s9 and over in Austin. I'm trying to decode it with LinPSK Software for Linux, but no such luck. I'm new to the data modes and so far the only thing I can successfully decode is ham rtty. Is there something else going on with this feed, encryption maybe? Also, I don't have the ability to set the baud rate with this software. Should that matter? Thanks - - Matt -- Posted via a free Usenet account from http://www.teranews.com |
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#7
November 20th 06, 07:09 PM
posted to rec.radio.shortwave
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What is this signal on 4.005 MHz?
In article ,
Rayburn wrote: You have to be able to change the shift to a wide shift (850 hz) instead of the narow shift found in the amateur bands. you have to be able to adjust the baud rate in the program . And you still won't be able to copy anything. Even 10-15 years ago, about half the FSK out there were these wide shift signals, encrypted and probably synchronous (no start and stop bits). Speculation: either broadcasts to maritime (fishing fleets?) or links for military sites too small for more expensive communications. Mark Zenier Googleproofaddress(account:mzenier provider:eskimo domain:com) |
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