[Scan-DC] another signal question

[Chris Smolinski]

I am pretty sure this is an FM mode, not SSB?

>That's odd. I was seeing ~600 hz spacing although that could have been
>my USB/LSB readings .. I tried recording and spectral analysis on
>USB/LSB and I received it cleared (the packets) just to mess around..
>You are correct in that there's a tone spacer/marker in between each
>"sub channel". I have never seen anything like it..
>
>curious as always,
>
>jay
>
>On 11/21/06, Chris Smolinski <csmolinski at blackcatsystems.com> wrote:
>>I've found some info on the protocol (seeing if I can whip together a
>>decoder for it quickly, as it is supposedly just 300 baud date with
>>four bytes per packet. There are three formats used). However, the
>>specs I have found say the mark/space tones are 1920 and 2140 Hz, yet
>>on 169.425, I am seeing roughly 1460 and 1700. I need to take some
>>more precise freq measurements, but they're no where near 1920/2140.
>>
>>>Yes, when I turn the knob on my Yaesu, It seems to be in "wide-band"
>>>mode so to speak..
>>>
>>>It's very annoying when scanning.. Maybe I should build a frequency
>>>bypass filter =)
>>>
>>>
>>>jay
>>>
>>>On 11/21/06, Chris Smolinski <csmolinski at blackcatsystems.com> wrote:
>>>>I am hearing multiple transmissions on this freq, that appear to use
>>>>slightly different modem frequencies. One of the URLs posted has a
>>>>map that shows various relay sites, also.
>>>>
>>>>>That's odd because I've heard IFLOWS on other freqs and they sound
>>>>>nothing like this. This must be some sort of relay?
>>>>>
>>>>>
>>>>>On 11/21/06, John Wilson <w4uvv at adelphia.net> wrote:
>>>>>>It is an IFLOWS data packet transmission.  Do a google search for the
>>>>>>IFLOWS website.


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Chris Smolinski
Black Cat Systems
http://www.blackcatsystems.com