When can we look forward to Pure Signal

G4BIM

Lets hope so....

Paul Christensen, W9AC

The potential for on-band interference reduction is remarkable.  Consider a tightly packed band like 20m. If all stations one day began using APD, we could fit close to 2x the number of SSB and digital stations on the band.  This is not about "sounding better" although there are some sonic benefits to SSB.   It's mostly about cleaning up transmissions that have been allowed to become worse since the advent of the RF power transistor.  Typical 3rd-order IMD levels from Heathkit, Drake, and Collins gear is a good 10 dB better than what we've seeing for the last 30 years. 

If skeptics could see what I've been watching from AC2IQ and WA1OXT, the skepticism would vanish.  One can watch opposite sideband IMD artifacts drop from -25 dBc to -60 dBc when APD is engaged.  This is not some cute marketing bragging right.  These guys have every right to brag if they want to.  It tells you something that if APD can clean up a class B amp into class A performance, we should all be paying attention.  No matter what we say, it won't sink in for many and the light bulb will finally illuminate when QST starts putting APD product under a  magnifying glass in their monthly Product Reviews.  With SDR, we've now reached receive performance perfection.  It's now the transmitter's turn.

I know the Flex team "gets it."  We'll just have to be patient for it to happen. 

Paul, W9AC

W9OY

I think there is magic yet to be performed on receive 73 W9OY

Ken - NM9P

Paul, I agree that the folks at Flex "get it," and have from the start, or they wouldn't have put the sensors in the rig in the first place.  And like you, I am willing to wait for them to "get it right!"  Gerald has essentially said they are working on it but don't want to reveal any industrial secrets (reading between the lines) or compromise/delay other items on the roadmap by promising before it they can deliver. (which would be an even worse marketing blunder than some consider not having a roadmap date for predistortion)  

I imagine that when it is ready for release it will be awesome.  
For now, I am checking out of this discussion...6 meters is open!  <grin>

np2g

Since flex "included" the internal sampling in their design I will presume that it takes care of the flex. However using a sampler at the final output ,amplifier. Pure signal correct the entire set up . Which is what you want it to do. Just pure signal In the exciter offers nice imd reduction. Total correction . Same effort, similar hardware, sampler after the amp. puts the WOW. In the package. And you guys that think lowering the standard or just making it is the way to go . I have a ARC 5 that I can sell you.

np2g

Improvements should never stop

Mr Radio

Is there an update about implementation of Pure Signal (pre-distortion)? Does someone know if apart of a new version of SSDR some additional hardware is needed to interface a Flex series 6000 radio with PG XL?

Butch

While I'd like to see Pre-Distortion implemented and I believe FRS will eventually make it happen, I have an even greater interest in a noise algorithm that works as well as NR2 function in the ANAN radios, and also implementing phase adjustable Diversity Receive (like many of us enjoyed with PowerSDR).

Many hams want a cleaner transmit signal and I think that's great. I'd pay for this improvement without hesitation. Sadly it's not hard to find heavily distorted and/or splattering SSB signals on the HF bands, and worse, some operators could care less, and are more interested in what their power meter is showing and their Point B S-meter readings. It's a safe bet this issue won't be going away anytime soon, so I'd prefer to see more SSDR program efforts put into NR improvements.

Butch KF4HR