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

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