Re: [softrock40] peaberry theory of operation?
- Hi Rick,
I knew that, I was merely voicing my anxiety in handling vacuum tubes.
None-the-less the Peaberry design is an extension of the Ensemble RXTX and a block diagram would better reveal what the add-ons are there for.
I know eyes glaze over when a microprocessor and a FPGA appear in a SDR but that's the present and future.
It only needs an expansion of the exam syllabus and I'm sure younger hams would be fine.
Forget the oldies, some who I hear on the air say they won't have a computer in the shack.
BTW very many of the hamradio SDR developers are well over 70 and going strong so age is no excuse.
73 ... Sid.
On 27/10/12 01:56, Rick Simpson wrote:
Sid,My nostalgia for tubes was tongue-in-cheek, of course. But it pointed to a greater truth. SDR has been almost exclusively used for radio equipment in business and the military for several decades. Have you ever seen a cell phone based on a superhet? But many hams don't want to build or own equipment based on principle they cannot understand. I have seen dozens of posts in the forum stating that the simplicity of the SoftRocks has finally allowed the writer to get into SDR, largely because they do not use any microprocessor technology except within the attached PC. You can understand the theory of operation of a SoftRock with nothing more than some familiarity with common ICs. I am sure it took years of education and experience to design the Peaberry or the Simple SDR Receiver, while any high school student can understand and build a regenerative receiver and a QRP transmitter. The end result of modern technology can produce wonderful products, but in the ham radio domain it has crippled the ability to build or understand our own equipment.Rick----- Original Message -----From: Sid BoyceSent: Friday, October 26, 2012 6:02 AMSubject: Re: [softrock40] peaberry theory of operation?Hang on Rick,
I longed to see the back of vacuum tubes forever having got a number of shocks from them.
I have built many transistor and FET PA's over the decades but never got up the courage to use that 813 which is still in a box in the loft since I got it in July 1966.
73 ... Sid.
On 26/10/12 02:36, Rick Simpson wrote:Sorry, but I am not willing to spend the time to learn PSoC Creator just so I can understand in general how the Peaberry works. No wonder folks long for the good 'ol days of vacuum tubes!Rick----- Original Message -----From: David TurnbullSent: Thursday, October 25, 2012 12:12 AMSubject: Re: [softrock40] peaberry theory of operation? [1 Attachment]
Rick,PSoC Creator is very visual with all the top level design done in schematic capture. What you're looking for is in the source code. Maybe you're not a Windows user so I've attached a picture of the top design.73 David AE9RBOn Wed, Oct 24, 2012 at 8:21 PM, Rick Simpson <goatguy101@...> wrote:
David,I had seen the posts here on the Peaberry but did not realize it used a PSoC. I examined the Peaberry website and wonder if anyone has generated a description of how the transciever works -- an overall flow diagram and description of what parts of the PSoC are used in what way to implement the necessary SDR functions.Rick----- Original Message -----From: David TurnbullSent: Wednesday, October 24, 2012 10:30 PMSubject: Re: [softrock40] Re: Interesting SDR project funded by DARPA
Rick and Sid,My Peaberry SDR transceiver kit uses the Cypress PSoC chip you are talking about. There are lots of models, including some with a Cortex M3, but I'm using the smallest 8051 version that supports USB.Source code and schematic here:73 David AE9RB
-- Sid Boyce ... Hamradio License G3VBV, Licensed Private Pilot Emeritus IBM/Amdahl Mainframes and Sun/Fujitsu Servers Tech Support Senior Staff Specialist, Cricket Coach Microsoft Windows Free Zone - Linux used for all Computing Tasks