SDR (Software Defined Radio) Transceiver

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pavel
Posts: 478
Joined: Sat May 23, 2015 5:22 pm

Re: SDR (Software Defined Radio) Transceiver

Post by pavel » Fri Mar 03, 2017 3:15 pm

However, I would like to know if each receiver has its own antenna or do they need to share the same antenna?
All we need is :
- one receiver with a 500 Khz bandwith and one antenna,
- one or more receiver with a 48 KHz bandwith and its own antenna (miniwhip).

It would be great to use GNU radio as PC side application.
Hello Arnaud,

In case of SDR Transceiver, each of the two receivers is connected to a separate RF input: RX1 is connected to IN1 and RX2 is connected to IN2. It's possible to use this project with GNU Radio via the gr-osmosdr blocks or via the small custom blocks written in Python. 48 kHz can be obtained from 50 kHz with the sample rate conversion done by a GNU Radio block. It's also possible to make a custom FPGA configuration with just two receivers and the sample rate conversion can be taken from SDR transceiver compatible with HPSDR

Best regards,

Pavel

F6bzg
Posts: 2
Joined: Thu Mar 02, 2017 12:12 pm

Re: SDR (Software Defined Radio) Transceiver

Post by F6bzg » Fri Mar 03, 2017 6:15 pm

Hello Pavel,

Many thanks for your reply.

The capabilities are all we wished.

As soon as possible, www.f4kji.fr will be extended.

Best regards and congrats for your work intended for the community

Arnaud

ted051
Posts: 20
Joined: Fri May 29, 2015 11:47 am
Location: Germany, Elsterberg

Re: SDR (Software Defined Radio) Transceiver

Post by ted051 » Tue Apr 04, 2017 9:08 am

Hi all,
here is the link to my new PowerPoint presentation of the DiscoRedTRX (in German), which is based on the RedPitaya and STM32F7Disco board:
http://wkiefer.bplaced.net/funk
It you don't have PowerPoint: Microsoft gives you the PowerPoint Viewer with no charge.
Best Regards,
Wolfgang Kiefer (DH1AKF)

jmfr
Posts: 19
Joined: Mon Nov 16, 2015 2:00 pm

Re: SDR (Software Defined Radio) Transceiver

Post by jmfr » Tue May 02, 2017 10:05 am

Hello ,

A few weeks ago my RP stop to work with any customized SD card image zip file from Pavel (ECO SYSTEM)
but it works well with the RedPitayaOS (complete OS, *.img file) .
What appends is with the customized SD card I can't connect to the Red Pitaya, I even test wiht diferent
SD cards ...

Did anyone had the same problem ? and a possible solution ? It's possible to be a RP problem ?

thank you

Jacinto

ted051
Posts: 20
Joined: Fri May 29, 2015 11:47 am
Location: Germany, Elsterberg

Re: SDR (Software Defined Radio) Transceiver

Post by ted051 » Mon Jul 03, 2017 9:18 pm

Hi, Jacinto!
Have you solved your problem? If you want, I can send you the newest version of DiscoRedTRX via my new homepage (1 GByte space)
Good luck, Wolfgang

take
Posts: 10
Joined: Mon Apr 18, 2016 2:30 am

Re: SDR (Software Defined Radio) Transceiver

Post by take » Sun Aug 27, 2017 6:05 am

Hi,

I have been using my Redpitaya for my HF main rig for almost a year long and there is no major issues I can find. Thank you very much.

I have a "PE4302 RF Attenuator Module" sourced through ebay. Is there any appropriate interface information to connect it to RedPitaya for either puresignal auto-calibration or TX Drive control? I have not yet used any serial interfaces on E2 connector on my RedPitaya.

I am waiting the response soon.

Regards,

take

de JA5AEA

ted051
Posts: 20
Joined: Fri May 29, 2015 11:47 am
Location: Germany, Elsterberg

Re: SDR (Software Defined Radio) Transceiver

Post by ted051 » Mon Aug 28, 2017 7:11 pm

Hi Take,
you have to set up an external controller, (I use a STM32F7Disco with touchscreen), maybe a simple ARDUINO and to write your own control program...
My DiscoRedTRX is open source, but it uses only 5 Bits for a PE4306.
Best regards

take
Posts: 10
Joined: Mon Apr 18, 2016 2:30 am

Re: SDR (Software Defined Radio) Transceiver

Post by take » Tue Aug 29, 2017 8:59 am

Hi ,

I downloaded your project file and found the information is written in page 26 & 27. It is astonishing enough for me to know two ARMs are connected with 115k UART and PE4306 is connected with I2C.

Well, I have taken the approach how to make it easy in the past and you are taking the most difficult one (from the scratch) but most fun for you.

I think I will stay PC Centric with most ready-made but I am sure I will look into these codes of these to be able to connect PE4302 board.

Thank you.

Regards,

take

de JA5AEA

DD4WH
Posts: 3
Joined: Wed Aug 30, 2017 8:10 am

Re: SDR (Software Defined Radio) Transceiver

Post by DD4WH » Wed Aug 30, 2017 8:40 am

Hi Wolfgang,

the DiscoRedTrx looks like a very nice TRX!
You mentioned that the software is open source, can it be found on github or could you give the URL where one can find it?
At the moment we are working on UHSDR STM32 standalone TRX software and are therefore very interested in other approaches.
https://github.com/df8oe/UHSDR

All the best,
Frank DD4WH

DD4WH
Posts: 3
Joined: Wed Aug 30, 2017 8:10 am

Re: SDR (Software Defined Radio) Transceiver

Post by DD4WH » Wed Aug 30, 2017 8:47 am

Hi take,

for the attenuator chip maybe this is useful:

// bit-banging of the digital step attenuator chip PE4306
// allows 0 to 31dB RF attenuation in 1dB steps
// https://github.com/jefftranter/Arduino/ ... pe4306.ino

I used that sucessfully in another SDR project to control the Pe4306 and it works fine!

73 de Frank DD4WH

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