I understood it perfectly. DSP is required because of the way the CW waveform is created in software.
-Tim -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Erwin van den Bosch (PA7N) Sent: Wednesday, November 24, 2010 9:31 AM To: [email protected] Subject: Re: [FlexEdge] CW transmit Flex 1500 and latency Tim, I think you don't understand my post. Please read again or tell me why you need a DSP buffer to create a sinus wave? CW is nothing more then a sinus wave. No DSP filtering needed to be able to output a sinus wave. Regards, Erwin. On 24-11-2010 13:55, Tim Ellison wrote: > You can't have a zero size DSP buffer. DSP is the "heart" of the radio and > does other things in addition to determining filter characteristics. > > I recommend waiting for CW, Part II > > > -Tim > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Erwin van den > Bosch (PA7N) > Sent: Wednesday, November 24, 2010 3:34 AM > To: [email protected] > Subject: [FlexEdge] CW transmit Flex 1500 and latency > > Just a thought: > > When I install 2.0.16 all DSP buffer sizes are 2048. For SSB and Digi modes I > can understand that because the filtering is better with A large buffer size > instead of A small buffer size. > > But when transmitting CW I think the DSP transmit buffer (not the USB/audio > buffer) can be zero because you don't need filtering on the CW carrier. Just > generate a nice sinewave (via calculation or a simple lookup table). By doing > this without DSP buffers the latency may be a little less when transmitting > CW. > > Regards, > Erwin > _______________________________________________ Flexedge mailing list [email protected] http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is used for posting topics related to SDR software development and experimentalist who are using beta versions of the software. _______________________________________________ Flexedge mailing list [email protected] http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is used for posting topics related to SDR software development and experimentalist who are using beta versions of the software.
