SDR - Software Defined Radio

Some thoughts and drabbles of the theme...

• sdr-dsp-3-block.png - Block diagram; Things at the SDR-DSP board, and things at plugins
• sdr-dsp-3-sch.pdf - SDR DSP v3 schematic
  • Analog Devices BlackFin ADSP-BF537 16/32 bit DSP processor running Linux and with builtin fast-ethernet MII/RMII interfaced ethernet MAC
  • Enough SDRAM to be able to run uCLinux
  • CAT-5 RJ45 Ethernet connection
  • Boot memory a serial SPI flash
  • Auxiliary memory (e.g. software) a MultiMediaCard (or SD/MMC) in SPI mode
  • Two UARTs on PC-like D9 male (second wired into CTS/RTS signals)
  • Power supplies for onboard use, and for SPORT-plugins
• sdr-dsp-io-iq-diff-3-sch.pdf - IO module
  • DC coupled differentially wired 24 bit 192 kHz sampled I- & Q-channels for input and output
  • TX DC bias point digitally tunable from about -4V to about +4V
  • RX accepts CMMR bias from about -4V to about +4V
  • TX and RX have 3rd order Bessel LPF of 92 kHz, and group-delay of 2.8 µs
• SDR-DSP-components.html - some further comments on the thing...
• SDR-USB-components.html - earlier plan of making essentially a high-quality USB sound-card + printer port

	Name	Last modified	Size	Description
	Parent Directory		-
	sdr-plan-f.fig	06-Jan-2005 01:59	4.5K
	sdr-plan-f.gif	06-Jan-2005 02:00	7.4K
	sdr-dsp-1-cam.pdf	27-Jul-2005 15:58	255K
	sdr-dsp-1-top.png	28-Jul-2005 19:56	78K
	sdr-dsp-1-pwr.png	28-Jul-2005 21:05	97K
	sdr-dsp-1-gnd.png	28-Jul-2005 21:09	94K
	sdr-dsp-1-bot.png	28-Jul-2005 21:12	51K
	sdr-dsp-1.netlist.txt	31-Jul-2005 18:24	21K
	sdr-dsp-1.parts-values.txt	04-Aug-2005 11:24	18K
	sdr-dsp-1.parts.txt	04-Aug-2005 19:28	33K
	sdr-iq-1.sch	07-Aug-2005 13:37	8.3K
	sdr-dsp-io-iq-vga.sch	09-Aug-2005 20:33	151K
	sdr-dsp-io-iq-vga.brd	09-Aug-2005 20:44	64K
	sdr-dsp-io-iq-diff.sch	10-Aug-2005 00:23	103K
	sdr-dsp-1.sch	10-Aug-2005 12:03	372K
	sdr-dsp-io-iq-diff.brd	10-Aug-2005 14:41	72K
	sdr-dsp-io-iq-vga-1-sch.pdf	10-Aug-2005 16:16	367K
	sdr-dsp-io-iq-diff-1-sch.pdf	10-Aug-2005 16:16	405K
	sdr-dsp-2.parts.txt	15-Aug-2005 11:31	22K
	sdr-dsp-io-iq-vga-2.parts.txt	16-Aug-2005 03:01	13K
	sdr-dsp-2.sch	17-Aug-2005 18:57	393K
	sdr-dsp-1-sch.pdf	21-Apr-2006 01:54	801K
	sdr-dsp-2-sch.pdf	21-Apr-2006 01:54	1.7M
	sdr-dsp-3-pcb.png	24-Apr-2006 20:16	77K
	sdr-dsp-3.parts.txt	28-Apr-2006 19:47	24K
	sdr-dsp-3.bom.byvalues	29-Apr-2006 21:37	4.1K
	sdr-dsp-3.bom.byparts	29-Apr-2006 21:39	12K
	sdr-dsp-3.netlist.txt	29-Apr-2006 21:57	20K
	sdr-dsp-3-block.gif	01-May-2006 02:56	5.2K
	sdr-dsp-3-block.png	01-May-2006 04:00	22K
	sdr-dsp-3-board.png	01-May-2006 23:11	63K
	sdr-dsp-io-iq-diff-2-brd.png	02-May-2006 00:08	47K
	sdr-dsp-io-iq-diff-2.parts-values.txt	06-May-2006 04:08	12K
	sdr-dsp-2.brd	10-May-2006 01:17	263K
	sdr-dsp-1.brd	10-May-2006 01:18	242K
	sdr-dsp-3-board.pdf	19-May-2006 11:51	1.0M
	sdr-dsp-io-iq-diff-2-brd.pdf	20-May-2006 01:13	427K
	sdr-dsp-io-iq-diff-2-sch.pdf	22-May-2006 21:50	408K
	sdr-dsp-io-iq-diff-3-sch.pdf	29-May-2006 00:35	421K
	sdr-dsp-io-if-rxtx-1-sch.pdf	31-May-2006 22:16	345K
	sdr-dsp-3.sch	28-Jun-2006 18:24	423K
	sdr-dsp-3.brd	29-Jun-2006 00:38	250K
	sdr-dsp-3-sch.pdf	29-Jun-2006 11:46	861K
	SDR-USB-components.html	31-Aug-2006 20:56	11K
	SDR-DSP-components.html	24-Jan-2007 10:39	7.8K
	sdr-usb-rx-screen1.png	13-Jul-2008 17:13	32K
	sdr-usb-rx-screen2.png	13-Jul-2008 20:24	34K
	sdr-usb-rx-screen3.png	14-Jul-2008 16:31	37K
	sdr-usb-rx-screen4.png	18-Jul-2008 05:34	50K
	hb9jnx-ad9864-rx.pdf	19-Jul-2008 14:40	446K
	ups-080721-1.jpg	21-Jul-2008 17:01	2.8M
	ups-080721-2.jpg	21-Jul-2008 17:01	3.3M
	ups-080721-3.jpg	21-Jul-2008 17:02	2.8M
	ad4002-mqk-1.pll	22-Jul-2008 02:47	15K
	sdr-usb-rx-v001-sch.pdf	16-Aug-2008 23:45	514K