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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*LF\:\s+Re\:\s+475kHz\s+crystal\s*$/: 12 ]

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1. Re: LF: Re: 475kHz crystal (score: 1): Author: "Graham" <[email protected]>; Date: Wed, 09 Jan 2013 01:09:07 +0100; That would be the most simple Joe Do you have such ? Tnx -G.. Hi Graham, Are you looking for software to program the AD9850/1 via the serial port? 73 Joe VO1NA On Tue, 8 Jan 2013, Graham wrote: Ok Mi; /rsgb_lf_group-archives/html/rsgb_lf_group/2013-01/msg00169.html (20,321 bytes)
2. Re: LF: Re: 475kHz crystal (score: 1): Author: [email protected]; Date: Thu, 10 Jan 2013 08:30:56 -0330 (NST); Hi Graham, The code is old (1988) turbobasic. It opens com2 and uses the RTS, TXD and DTR lines to bases of NPN inverters thence to the FQ_UD, F_CLK and DATA pins of the DDS chip. If this is of inter; /rsgb_lf_group-archives/html/rsgb_lf_group/2013-01/msg00218.html (20,731 bytes)
3. Re: LF: Re: 475kHz crystal (score: 1): Author: [email protected]; Date: Tue, 8 Jan 2013 19:17:53 -0330 (NST); Hi Graham, Are you looking for software to program the AD9850/1 via the serial port? 73 Joe VO1NA Ok Minto This implies it can address the via the serial link , if so , then its a way in ? 73 -G, htt; /rsgb_lf_group-archives/html/rsgb_lf_group/2013-01/msg00243.html (19,316 bytes)
4. Re: LF: Re: 475kHz crystal (score: 1): Author: "Graham" <[email protected]>; Date: Tue, 08 Jan 2013 22:07:48 +0100; From the mfg web-site , seems to be pc based support software ? could not this be used to run the 'dds demonstration kit' directly ? Hi Graham, It is possible to use the parallel port of a PC to cont; /rsgb_lf_group-archives/html/rsgb_lf_group/2013-01/msg00304.html (17,827 bytes)
5. Re: LF: Re: 475kHz crystal (score: 1): Author: "Graham" <[email protected]>; Date: Tue, 08 Jan 2013 22:32:32 +0100; Ok Minto This implies it can address the via the serial link , if so , then its a way in ? 73 -G, http://designtools.analog.com/dt/dds/ad9850.html Graham, Did you find a website of the mfg of this sp; /rsgb_lf_group-archives/html/rsgb_lf_group/2013-01/msg00415.html (19,435 bytes)
6. LF: Re: 475kHz crystal (score: 1): Author: Minto Witteveen <[email protected]>; Date: Tue, 8 Jan 2013 21:42:57 +0100; Hi Graham, It is possible to use the parallel port of a PC to control the DDS, the DDS has a 3-wire SPI interface. See for instance: http://www.qsl.net/p/pa3ckr//signalgenerator/ . Here you will find; /rsgb_lf_group-archives/html/rsgb_lf_group/2013-01/msg00467.html (17,854 bytes)
7. Re: LF: Re: 475kHz crystal (score: 1): Author: edgar <[email protected]>; Date: Wed, 09 Jan 2013 08:26:57 +1100; Hi, These pages may be of interest in using DDS. http://midnightdesignsolutions.com/dds60/index.html http://www.njqrp.org/dds/waystouse.html Regards, Edgar Moonah, Tasmania.; /rsgb_lf_group-archives/html/rsgb_lf_group/2013-01/msg00499.html (11,241 bytes)
8. LF: Re: 475kHz crystal (score: 1): Author: Minto Witteveen <[email protected]>; Date: Tue, 8 Jan 2013 22:51:58 +0100; Ah now I see where the confusion comes from. The page youre referring to contains an on-line calculator for the DDS (Device Configuration Assistant). Here you can for instance calculate the frequency; /rsgb_lf_group-archives/html/rsgb_lf_group/2013-01/msg00512.html (21,439 bytes)
9. Re: LF: Re: 475kHz crystal (score: 1): Author: "Graham" <[email protected]>; Date: Tue, 08 Jan 2013 22:47:40 +0100; Ah,, may just be a dumb code gen , sure I have seen some driving software on the Analogue site G.. Ok Minto This implies it can address the via the serial link , if so , then its a way in ? 73 -G, ht; /rsgb_lf_group-archives/html/rsgb_lf_group/2013-01/msg00635.html (20,096 bytes)
10. LF: Re: 475kHz crystal (score: 1): Author: Minto Witteveen <[email protected]>; Date: Tue, 8 Jan 2013 19:46:05 +0100; Or, as long as you are going to use a PIC anyway, order a AD9850 DDS module from buyincoins.com. This 0-40MHz DDS costs less than $5 (including shipping). Add a cheap PIC, a $5 2x16 LCD and a rotary; /rsgb_lf_group-archives/html/rsgb_lf_group/2013-01/msg00641.html (15,739 bytes)
11. LF: Re: 475kHz crystal (score: 1): Author: Minto Witteveen <[email protected]>; Date: Tue, 8 Jan 2013 22:23:11 +0100; Graham, Did you find a website of the mfg of this specific board? I cant find it, although there is plenty of info on the Internet for this specific board (pin layout, programming specs). And of cour; /rsgb_lf_group-archives/html/rsgb_lf_group/2013-01/msg00711.html (19,629 bytes)
12. Re: LF: Re: 475kHz crystal (score: 1): Author: "Graham" <[email protected]>; Date: Tue, 08 Jan 2013 21:18:03 +0100; Minto Is it possible to communicate with the DDS from the PC for a simple VFO or need the pic ? G. Or, as long as you are going to use a PIC anyway, order a AD9850 DDS module from buyincoins.com. Thi; /rsgb_lf_group-archives/html/rsgb_lf_group/2013-01/msg00744.html (15,643 bytes)

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