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SmartSDR v3.8.20 and the SmartSDR v3.8.20 Release Notes
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Whats the logic for using DIGU instead of USB for FT8. If you use usb with a 4K filter you can see t
N4AB
Member ✭✭
Whats the logic for using DIGU instead of USB for FT8. If you use usb with a 4K filter you can see the whole band and jump any where to transmit.
73 Al, N4AB
73 Al, N4AB
0
Answers
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DIGU removes any transmit audio processing or shaping, providing a nice clean, flat response for your digital operation. In receive you can also use wider bandwidths - I use 5 kHz on HF.3
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Can use wide bandwidth in digiu as well...0
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I find the "wide graph" contained within the FT8 program to be much more useful in finding a free transmit frequency than attempting to use the SSDR screen.0
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Another reason is that DIGIU turns off all processing0
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Sorry, I didn’t see the earlier reply.0
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I seem to remember someone (might have been steve) saying it also had lower latency.0
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Al
Also, the bandwidth filters are optimized for digital applications when using DIGU, they will either all use a 1500Hz center frequency or will be wide filters that start at 0 Hz and then go up to some useful upper cutoff point, like 3k or wider. Whereas USB filters are optimized for voice operations.73, Jay - NO5J
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