Michael VK3MM. Controlled Envelope SSB

Mike McDonald

I wonder if Flex has considered implementing Controlled Envelope SSB in the flex 6700?

I read they done some development work in this area in the past and as it seems to be largely a software thing I thought it would make a good addition?

k3Tim

I "know" CE-SSB is in there...  

Checking the previous release notes from V 1.2.17., I believe it is called Downward EXPander (DEXP).  :

http://www.flexradio.com/downloads/smartsdr_v1-2-17_release_notes-pdf/

The release note has some important information about setting mic-gain levels that are relevant in the current s/w.  It is a must read.

The QEX article also eludes to it being in SSDR:

http://www.arrl.org/files/file/QEX_Next_Issue/2014/Nov-Dec_2014/Hershberger_QEX_11_14.pdf

CE-SSB is different from Envelope Tracking that sets the PA voltage to a setting for maximum efficiency based on the instantaneous power.  The interested student will Google "Envelope Tracking" for further details.


Best Regards,

k3Tim

k3Tim

The QeX write-up:

http://www.arrl.org/files/file/QEX_Next_Issue/2014/Nov-Dec_2014/Hershberger_QEX_11_14.pdf

Tim - W4TME

The CE-SSB speech processor has been in SmartSDR for several versions.  It is the PROC feature.

W9OY

CESSB was in SSDR long before the QEX article

Mike McDonald

Thanks for the response I will check it out.

Cheers

Michael VK3MM

k0eoo

Thanks for the link to the article Tim....