GRANTED I'm fully aware that these TV Carriers will probably fade into history soon as the rest of the world migrates to HD TV. CW Skimmers purpose was to receive a wide portion of band - you wont get >40 kHz passband from 'normal' rigs, only from the SDRs. This application will then feed 'spots' of TV carriers between 49.739.0 and 49.761.0 to "DXFunnel" for human monitoring, and spotting to clusters. Basic parameters: FT4 message formats are the same as those in FT8 and encoded. needed for RTTY, while using much less bandwidth. FT4 can work with signals 10 dB weaker than. Now I have to clean up the app, add some nice options like CAT control/update of the RF freq, and things like controls to alter the graph size and such. sequences are 6 seconds long, so FT4 is 2.5 × faster than FT8 and about the same. This is ONLY A TEST JIG to proof of concept the idea. This video demo's how it currently works. Since I didn't have a REAL video carrier I used a local baby monitor carrier to test, and I changed the VFO up and down to simulate a new video carrier just showing up.
#Skimmer jt65 software#
The software uses the 11 kHz point as the 'center frequency' and deviations +/- map in a graph and small datatable with their SNR (signal to noise ratio). So for example I set a VFO or VRX (virtual RX) to 'digital' mode this presents 24 kHz of Audio via a Virtual Audio Cable (virtual sound card). I started creating an application named "DXVideo" which can monitor a 22 kHz Audio Spectrum, and map it to RF frequency. Become a CQ with a power of 1 watt, working for a while, then see who and where you heard it. Working with SDRBridge and CW Skimmer is easy and WSJT-X also works, as does fldigi and HRD and all the other modes. It is very interesting to experiment with QRP. I think that having CW Skimmer and SSDR on the same screen is not a good idea, as it clutters up SSDR, which should be standalone, without JT65 and other modes and programs attached to it. The last area (aside from SSB :-) ) to monitor is TV Video Carriers. - a continuation of the skimmer ideas, but only for RTTY, PSK and WSJT.
#Skimmer jt65 serial#
I am using the Universal Serial Bus (USB) socket on the back of the FTdx101 - all settings on the radio remain at default unless indicated below. It pushes spots of CW signals from 50.0 to 50.130 into DXfunnel. Shortcut to page: The following settings are those I use on my FTdx101 and other software. "DXFunnel" can also monitor the output from my Skimmer Server which is based on Anan "Hermes" SDR. IT's still not simple tho.Ĭurrently my "DXFunnel" app can monitor all WSJT modes which output data via UDP from up to 8 WSJT's (including JTDX).
#Skimmer jt65 code#
But recently I came across some code libraries that help simplify this process. I've always struggled with Audio DSP and FFT software development.
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