Date: Tue, 8 Jan 2013 19:17:53 -0330 (NST)
From: jcraig@mun.ca
To: rsgb_lf_group@blacksheep.org
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Subject: Re: LF: Re: 475kHz crystal
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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 Minto
>
> This  implies  it  can  address the  via the  serial  link , if so  , the=
n=20
> its a  way in ?
>
> 73 -G,
>
>
> http://designtools.analog.com/dt/dds/ad9850.html
>
> --------------------------------------------------
> From: "Minto Witteveen" <minto.witteveen@gmail.com>
> Sent: Tuesday, January 08, 2013 9:23 PM
> To: <rsgb_lf_group@blacksheep.org>
> Subject: LF: Re: 475kHz crystal
>
>> Graham,
>> Did you find a website of the mfg of this specific board? I can=E2=80=99=
t find=20
>> it, although there is plenty of info on the Internet for this specific=
=20
>> board (pin layout, programming specs). And of course 9850 datasheets on =
the=20
>> website of Analog Devices, the mfg of the DDS chip itself.
>> Can you point me to the website with the pc based support software, I wi=
ll=20
>> look into it to see what it can do. But whatever the software can do, yo=
u=20
>> still need to interface the SPI, and a =E2=80=98standard=E2=80=99  PC ha=
s only the=20
>> parallel interface that can be used..
>>=20
>> Minto pa3bca
>>=20
>>=20
>>=20
>>=20
>> ------------------------------------------------------------------------=
--
>> Ceterum censeo Carthaginem delendam esse
>> -----Original Message----- From: Graham
>> Sent: Tuesday, January 08, 2013 22:06
>> To: rsgb_lf_group@blacksheep.org
>> Subject: Re: LF: Re: 475kHz crystal
>>=20
>> From the  mfg  web-site , seems  to  be  pc based  support  software ?
>> could  not  this be  used to  run the  'dds  demonstration kit'   direct=
ly
>> ?
>>=20
>> --------------------------------------------------
>> From: "Minto Witteveen" <minto.witteveen@gmail.com>
>> Sent: Tuesday, January 08, 2013 8:42 PM
>> To: <rsgb_lf_group@blacksheep.org>
>> Subject: LF: Re: 475kHz crystal
>>=20
>>> Hi Graham,
>>>=20
>>> It is possible to use the parallel port of a PC to control the DDS, the=
=20
>>> DDS has a 3-wire SPI interface. See for instance:=20
>>> http://www.qsl.net/p/pa3ckr//signalgenerator/ . Here you will find=20
>>> (amongst a lot of other info) a VB program to control the DDS=20
>>> (http://www.qsl.net/p/pa3ckr//signalgenerator/prad9850.zip). But be=20
>>> prepared to re-install W95 or possibly DOS because it will not work wit=
h=20
>>> newer versions of windows=E2=80=A6.
>>>=20
>>> Using a PIC is the easiest method I think.  Andy already beat me to it,=
=20
>>> see his earlier reply to my mail. If you do not want to make a PCB you =
can=20
>>> even build it using a prototyping breadboard.
>>>=20
>>> Minto pa3bca
>>>=20
>>>=20
>>>=20
>>>=20
>>> -----------------------------------------------------------------------=
---
>>> Ceterum censeo Carthaginem delendam esse
>>> -----Original Message----- From: Graham
>>> Sent: Tuesday, January 08, 2013 21:16
>>> To: rsgb_lf_group@blacksheep.org
>>> Subject: Re: LF: Re: 475kHz crystal
>>>=20
>>> Minto
>>>=20
>>> Is it possible to communicate  with the  DDS  from the  PC  for  a simp=
le
>>> VFO or  need  the  pic  ?
>>>=20
>>> G.
>>>=20
>>> --------------------------------------------------
>>> From: "Minto Witteveen" <minto.witteveen@gmail.com>
>>> Sent: Tuesday, January 08, 2013 6:46 PM
>>> To: <rsgb_lf_group@blacksheep.org>; <rsgb_lf_group@yahoogroups.co.uk>
>>> Subject: LF: Re: 475kHz crystal
>>>=20
>>>> Or, as long as you are going to use a PIC anyway, order a AD9850 DDS=
=20
>>>> module from buyincoins.com. This 0-40MHz DDS costs less than $5=20
>>>> (including shipping). Add a cheap PIC, a $5 2x16 LCD and a rotary enco=
der=20
>>>> (or use your PC to communicate with the PIC) and you can generate any=
=20
>>>> frequency you want. And use the PIC to generate Opera, wspr, qrss.
>>>> My next project. I already have all the components=E2=80=A6.
>>>>=20
>>>> Minto pa3bca.
>>>>=20
>>>>=20
>>>>=20
>>>>
>>>>=20
>>>> ----------------------------------------------------------------------=
----
>>>> Ceterum censeo Carthaginem delendam esse
>>>> -----Original Message----- From: Klaus Hirschelmann
>>>> Sent: Tuesday, January 08, 2013 12:00
>>>> To: rsgb_lf_group@blacksheep.org
>>>> Subject: Re: Fw: LF: 475kHz crystal
>>>>=20
>>>> Hi Pete and group
>>>>=20
>>>>>> maybe we can bring http://www.hanssummers.com/ for also offering=20
>>>>>> 630m-Band versions of his QRSS and WSPR kits.
>>>>=20
>>>>> He doesn't seem to have taken MF on board as far as I can see. May on=
e=20
>>>>> of his rigs can be modified I have not checked my self.
>>>> He does mention the use of Si570 programable xtal. I have one on a boa=
rd
>>>> with set frequencies from a PIC and selected by binary from a dil swit=
ch.
>>>> They will not operate as low as 500kc/s so they have to be divided with
>>>> either a CD4040 or CD4060 or any other logic divider. However it gives
>>>> stable selectable xtal frequencies. In this case it is probably worth=
=20
>>>> going
>>>> the extra mile and make up a DSS as the master oscillator which will g=
ive
>>>> VFO coverage. I think your pays your money and takes you choice as they
>>>> say....... hee.
>>>>=20
>>>> What i intend to do, is building a relatively simple Stand-Alone WSPR=
=20
>>>> beacon
>>>> for 630m-Band. Using a Si570 with additional divider seemed to be quit=
e=20
>>>> an
>>>> expensive solution. So i did order 7611.2 KHz crystal ( there is a=20
>>>> company
>>>> manucturing crystals according to given frequency ). By using a HCF406=
0B
>>>> oscillator/divider this should give a stable signal around WSPR midden
>>>> frequency 475.7 KHz. WSPR signal generation is planned according to
>>>> http://www.knology.net/~gmarcus/WSPR/WWVB_WSPR%20VCXO%20Contoller.pdf=
=20
>>>> where
>>>> ( for use in Europe ) i intend to use DCF77 time signals instead of WW=
VB.
>>>> Suitable PIC program version is made by PE1NWL and available via
>>>> http://www.knology.net/~gmarcus/ , while DCF77 receiver module is=20
>>>> obtainable
>>>> from Conrad Electronics.
>>>> Because of later signal division by 16, this conception will require a
>>>> multiplication of crystal FSK deviation by same factor. For WSPR this=
=20
>>>> should
>>>> result in values around 23.43 Hz which ( i hope ) will not cause any
>>>> problem.
>>>> So far my plans in the moment, but of course it would be much easier, =
in
>>>> case somebody would offer a kit already doing all i like.
>>>> ..
>>>> Klaus, DJ7OO
>>>>=20
>>>>=20
>>>>=20
>>>>=20
>>>>=20
>>>=20
>>=20
>>=20
>
>
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