SDR – SOFTWARE DEFINED RADIO - SDR – SOFTWARE DEFINED RADIO SDR RECEIVER DEMO Andy,...

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Transcript of SDR – SOFTWARE DEFINED RADIO - SDR – SOFTWARE DEFINED RADIO SDR RECEIVER DEMO Andy,...

  • SDR – SOFTWARE DEFINED RADIO

    SDR RECEIVER DEMO Andy, VE3FYA Chip, VA3KGB

    Kingston Amateur Radio Club 7 Jan 2015

  • WHAT IS SDR?

    • SDR – Software Defined Radio • Hardware is used to receive/transmit a

    signal • Software is used to process the signal • The computer does all the hard work so

    the radio can be of simpler design

  • ADVANTAGES

    • Upgrades or features can be added or expanded through software/firmware updates

    • Hardware of the radio in most cases does not need to be changed unless going outside the original design specs

    • Software upgrade will access newer features

  • ADVANTAGES

    • For example: – A radio’s hardware is designed to work certain

    bands including future bands that are currently not available.

    – The initial software/firmware release would not allow transmitting on the future bands

    – When future bands become legal software/firmware upgrade would allow transmit function

  • SDR EXAMPLES

    • Flex Radio series of transceivers: – Expensive but very versatile

    • SDR Receivers – Dedicated SDR Receivers costing up to

    $1,000 or more, for example Perseus • SDR USB Dongle Receivers

    – Based on R820T – Cheap $10 up – Does not receive HF without an Upconverter

  • RTL-SDR RECEIVER

    • 100KHz-1.7GHz • R820T+8232 • Built in upconverter

    for HF • USB for power and

    connection • 2 antenna

    connectors • $60 Cdn

  • SDR SOFTWARE

    • Variety of FREE software • Examples:

    – SDR# (SDRSharp) – HDSDR – Gqrx SDR – SeeDeR – SDR Touch (Android) – Requires OTG cable – And others

    • Windows Driver: Zadig

  • SDR SOFTWARE

    • READ and FOLLOW the instructions for the software you are using especially the Zadig driver installation.

    • Turn up the RF Gain or you will not receive anything!

    • For HF you need to use the “Q” parameter • See RTL-SDR.com Quick Start User

    Guide • “Run as Administrator” for Win 7/8

  • SDR# (SDR Sharp)

  • HAM USES of SDR RCVR • General purpose receiver to listen to signals • Panoramic display of frequencies to see where

    other stations are – can also be tapped into IF of your transceiver, kits

    available for some radios • Connect to other software to decode various

    modes such as CW, PSK31, APRS, ACARS, SSTV, etc – Requires a virtual cable software such as:

    • VB-Cable (Free, max sample rate of 96k) • Virtual Audio Cable ( $25+, max sample rate of 192k)

  • LINKS

    • SDR# (SDRSharp) - www.sdrsharp.com • HDSDR – www.hdsdr.de • Gqrx SDR – www.gqrx.dk • SeeDeR -

    www.southernstars.com/skycube/seeder.html • SDR Touch (Android)- www.sdrtouch.com • Windows Driver: Zadig if not provided with

    SDR program download: http://zadig.akeo.ie/

  • LINKS • VB-Cable –

    http://vb-audio.pagesperso-orange.fr/Cable/ • Virtual Cable –

    http://software.muzychenko.net/eng/vac.htm • Panoramic Adaptor Tap Board –

    http://g4hup.com/PAT.htm • RTL-SDR USB Tuner Receiver –

    - type rtl-sdr usb tuner receiver: – www.ebay.ca – www.google.ca

  • LIVE DEMO

    • In the true spirit of Amateur Radio, on this cold night of -30 with the wind chill, an expedient antenna has been deployed!

    • And now for the SDR live demo.