Controlled Envelope SSB

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  • Updated 4 months ago
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Is  Controlled Envelope SSB used in the DigL or DigiU mode?
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Dave Gipson

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Posted 4 months ago

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Tim - W4TME, Customer Experience Manager

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No.  When a digital mode (DIGx and RTTY) is selected, all signal processing is bypassed.
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Dave Gipson

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Thanks. I can see that actually happening, so...... is there an advantage when using a mode such as JT-8 to use USB instead of DigU, or is it actually disadvantageous? 
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KY6LA - Howard, Elmer

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Definitely a disadvantage to use USB for Digital Modes as the various DSP and CESSB add non linearity's that can corrupt digital signals.
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Lin N4YCI

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I just wish it would remember that I change the default bandwidth from 1khz to 3khz to operate FT-8.  Maybe that is in the global settings or something.  I have not dived that deep into the manual.  I have never run RTTY, but I am guessing that 1khz is standard for other digital modes.  It is nice to have a bit of extra functional bandwidth as some people are operating slightly below or above the "designated" FT-8 frequencies due to crowding.
(Edited)
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Dave Gipson

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I set up my FT-8 modes and save a profile with the appropriate BW, etc. Just don't switch bands with transmit selected  and ready when in the FT modes.