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Looking for a DDS module 10kHz-1MHz, 2Vrms sine into 50ohms

Started by Joerg February 2, 2013
For a tester project I need a DDS source, should be a module but with
some decent output power and if possible a display. SPI or RS232 style
control would be nice. So far I only found this kind:

http://www.amazon.com/SG1005-Signal-Generator-Source-Function/dp/B008N7M5KU/ref=sr_1_1?ie=UTF8&qid=1359855256&sr=8-1&keywords=SG1005+DDS

Some comments are not so enthusing though:
http://www.elecfreaks.com/279.html

Can't find a manual for it or any decent info. Does anyone know where,
or has a suggestion for a better module? Need 10kHz to 1MHz (higher
would be nice) range, 2Vrms or so sine wave into a 50ohms load. Price is
not so important, can be $100/module.

Hacking is no problem, for example to get around a RS232/USB chip
because I can't really use USB. Sine wave quality doesn't have to be
super stellar, slight distortion would be ok. But I can't use a big boxy
function generator since it has to be integrated in the tester.

-- 
Regards, Joerg

http://www.analogconsultants.com/
On Feb 3, 2:50=A0am, Joerg <inva...@invalid.invalid> wrote:
> For a tester project I need a DDS source, should be a module but with > some decent output power and if possible a display. SPI or RS232 style > control would be nice. So far I only found this kind: > > http://www.amazon.com/SG1005-Signal-Generator-Source-Function/dp/B008... > > Some comments are not so enthusing though:http://www.elecfreaks.com/279.h=
tml
> > Can't find a manual for it or any decent info. Does anyone know where, > or has a suggestion for a better module? Need 10kHz to 1MHz (higher > would be nice) range, 2Vrms or so sine wave into a 50ohms load. Price is > not so important, can be $100/module. > > Hacking is no problem, for example to get around a RS232/USB chip > because I can't really use USB. Sine wave quality doesn't have to be > super stellar, slight distortion would be ok. But I can't use a big boxy > function generator since it has to be integrated in the tester. > > -- > Regards, Joerg > > http://www.analogconsultants.com/
https://www.sparkfun.com/products/9169 ? you'd need a buffer but you said you didn't mind a bit of hacking -Lasse
On Sat, 02 Feb 2013 17:50:59 -0800, Joerg
<invalid@invalid.invalid> wrote:

>For a tester project I need a DDS source, should be a module but with >some decent output power and if possible a display. SPI or RS232 style >control would be nice. So far I only found this kind: > >http://www.amazon.com/SG1005-Signal-Generator-Source-Function/dp/B008N7M5KU/ref=sr_1_1?ie=UTF8&qid=1359855256&sr=8-1&keywords=SG1005+DDS > >Some comments are not so enthusing though: >http://www.elecfreaks.com/279.html > >Can't find a manual for it or any decent info. Does anyone know where, >or has a suggestion for a better module? Need 10kHz to 1MHz (higher >would be nice) range, 2Vrms or so sine wave into a 50ohms load. Price is >not so important, can be $100/module. > >Hacking is no problem, for example to get around a RS232/USB chip >because I can't really use USB. Sine wave quality doesn't have to be >super stellar, slight distortion would be ok. But I can't use a big boxy >function generator since it has to be integrated in the tester.
http://www.ebay.com/itm/DDS-LCD1602-Sweep-Function-Signal-Source-Generator-Wave-Meter-Tester-5MHz-5V-PSU-/290720082598?pt=UK_BOI_Electrical_Test_Measurement_Equipment_ET&hash=item43b0446aa6 Several kinds of outputs, 50 ohm, ttl, etc. Even has a knob and comes with power, too. But since it is Hong Kong, I'd write and make sure they know it's going to 60Hz, 110VAC so they provide the RIGHT part with it. Jon
On Sat, 02 Feb 2013 18:30:56 -0800, I wrote:

>>snip> >http://www.ebay.com/itm/DDS-LCD1602-Sweep-Function-Signal-Source-Generator-Wave-Meter-Tester-5MHz-5V-PSU-/290720082598?pt=UK_BOI_Electrical_Test_Measurement_Equipment_ET&hash=item43b0446aa6 > >Several kinds of outputs, 50 ohm, ttl, etc. Even has a knob >and comes with power, too. But since it is Hong Kong, I'd >write and make sure they know it's going to 60Hz, 110VAC so >they provide the RIGHT part with it. > >Jon
Ah. Crap. Looks like the SAME unit!! hehe. Sorry, J&#2013266166;rg. Jon
On Sat, 02 Feb 2013 17:50:59 -0800, Joerg wrote:

> For a tester project I need a DDS source, should be a module but with > some decent output power and if possible a display. SPI or RS232 style > control would be nice. So far I only found this kind: > > http://www.amazon.com/SG1005-Signal-Generator-Source-Function/dp/
B008N7M5KU/ref=sr_1_1?ie=UTF8&qid=1359855256&sr=8-1&keywords=SG1005+DDS
>
Not sure if it fits your needs (no display) but on Ebay there are lots of cheap AD9850 or AD9851 based modules starting at less than $5. Source code for programming can be easily found around the net.
langwadt@fonz.dk wrote:
> On Feb 3, 2:50 am, Joerg <inva...@invalid.invalid> wrote: >> For a tester project I need a DDS source, should be a module but with >> some decent output power and if possible a display. SPI or RS232 style >> control would be nice. So far I only found this kind: >> >> http://www.amazon.com/SG1005-Signal-Generator-Source-Function/dp/B008... >> >> Some comments are not so enthusing though:http://www.elecfreaks.com/279.html >> >> Can't find a manual for it or any decent info. Does anyone know where, >> or has a suggestion for a better module? Need 10kHz to 1MHz (higher >> would be nice) range, 2Vrms or so sine wave into a 50ohms load. Price is >> not so important, can be $100/module. >> >> Hacking is no problem, for example to get around a RS232/USB chip >> because I can't really use USB. Sine wave quality doesn't have to be >> super stellar, slight distortion would be ok. But I can't use a big boxy >> function generator since it has to be integrated in the tester. >> >> -- >> Regards, Joerg >> >> http://www.analogconsultants.com/ > > https://www.sparkfun.com/products/9169 ? > > you'd need a buffer but you said you didn't mind a bit of hacking >
Then I might a well just buy the bare chip, it's cheaper :-) -- Regards, Joerg http://www.analogconsultants.com/
Jon Kirwan wrote:
> On Sat, 02 Feb 2013 17:50:59 -0800, Joerg > <invalid@invalid.invalid> wrote: > >> For a tester project I need a DDS source, should be a module but with >> some decent output power and if possible a display. SPI or RS232 style >> control would be nice. So far I only found this kind: >> >> http://www.amazon.com/SG1005-Signal-Generator-Source-Function/dp/B008N7M5KU/ref=sr_1_1?ie=UTF8&qid=1359855256&sr=8-1&keywords=SG1005+DDS >> >> Some comments are not so enthusing though: >> http://www.elecfreaks.com/279.html >> >> Can't find a manual for it or any decent info. Does anyone know where, >> or has a suggestion for a better module? Need 10kHz to 1MHz (higher >> would be nice) range, 2Vrms or so sine wave into a 50ohms load. Price is >> not so important, can be $100/module. >> >> Hacking is no problem, for example to get around a RS232/USB chip >> because I can't really use USB. Sine wave quality doesn't have to be >> super stellar, slight distortion would be ok. But I can't use a big boxy >> function generator since it has to be integrated in the tester. > > http://www.ebay.com/itm/DDS-LCD1602-Sweep-Function-Signal-Source-Generator-Wave-Meter-Tester-5MHz-5V-PSU-/290720082598?pt=UK_BOI_Electrical_Test_Measurement_Equipment_ET&hash=item43b0446aa6 > > Several kinds of outputs, 50 ohm, ttl, etc. Even has a knob > and comes with power, too. But since it is Hong Kong, I'd > write and make sure they know it's going to 60Hz, 110VAC so > they provide the RIGHT part with it. >
That seems to be the very same module as in my link. It comes under all sorts of part numbers and names. What I (so far) have not found is any useful documentation about these boards. -- Regards, Joerg http://www.analogconsultants.com/
asdf wrote:
> On Sat, 02 Feb 2013 17:50:59 -0800, Joerg wrote: > >> For a tester project I need a DDS source, should be a module but with >> some decent output power and if possible a display. SPI or RS232 style >> control would be nice. So far I only found this kind: >> >> http://www.amazon.com/SG1005-Signal-Generator-Source-Function/dp/ > B008N7M5KU/ref=sr_1_1?ie=UTF8&qid=1359855256&sr=8-1&keywords=SG1005+DDS > > Not sure if it fits your needs (no display) but on Ebay there are lots of > cheap AD9850 or AD9851 based modules starting at less than $5. > Source code for programming can be easily found around the net.
Yes, those can be bought everywhere. But no LCD, no output buffer amp, bare bones. Those are almost like buying the bare chip. I am looking for something I can screw into a tester and have some local control as well. Worst case I'll have to order a module like in my link and reverse engineer it so I can arrive at a hack that makes it work in our tester. -- Regards, Joerg http://www.analogconsultants.com/
On Feb 3, 4:29=A0pm, Joerg <inva...@invalid.invalid> wrote:
> langw...@fonz.dk wrote: > > On Feb 3, 2:50 am, Joerg <inva...@invalid.invalid> wrote: > >> For a tester project I need a DDS source, should be a module but with > >> some decent output power and if possible a display. SPI or RS232 style > >> control would be nice. So far I only found this kind: > > >>http://www.amazon.com/SG1005-Signal-Generator-Source-Function/dp/B008..=
.
> > >> Some comments are not so enthusing though:http://www.elecfreaks.com/27=
9.html
> > >> Can't find a manual for it or any decent info. Does anyone know where, > >> or has a suggestion for a better module? Need 10kHz to 1MHz (higher > >> would be nice) range, 2Vrms or so sine wave into a 50ohms load. Price =
is
> >> not so important, can be $100/module. > > >> Hacking is no problem, for example to get around a RS232/USB chip > >> because I can't really use USB. Sine wave quality doesn't have to be > >> super stellar, slight distortion would be ok. But I can't use a big bo=
xy
> >> function generator since it has to be integrated in the tester. > > >> -- > >> Regards, Joerg > > >>http://www.analogconsultants.com/ > > >https://www.sparkfun.com/products/9169? > > > you'd need a buffer but you said you didn't mind a bit of hacking > > Then I might a well just buy the bare chip, it's cheaper :-) >
but then you'll need a pcb, xtal regulator, etc. and have to build it with this you just need a buffer amp. You don't have something laying around with ~3-4x gain that can drive 50R? -Lasse
langwadt@fonz.dk wrote:
> On Feb 3, 4:29 pm, Joerg <inva...@invalid.invalid> wrote: >> langw...@fonz.dk wrote: >>> On Feb 3, 2:50 am, Joerg <inva...@invalid.invalid> wrote: >>>> For a tester project I need a DDS source, should be a module but with >>>> some decent output power and if possible a display. SPI or RS232 style >>>> control would be nice. So far I only found this kind: >>>> http://www.amazon.com/SG1005-Signal-Generator-Source-Function/dp/B008... >>>> Some comments are not so enthusing though:http://www.elecfreaks.com/279.html >>>> Can't find a manual for it or any decent info. Does anyone know where, >>>> or has a suggestion for a better module? Need 10kHz to 1MHz (higher >>>> would be nice) range, 2Vrms or so sine wave into a 50ohms load. Price is >>>> not so important, can be $100/module. >>>> Hacking is no problem, for example to get around a RS232/USB chip >>>> because I can't really use USB. Sine wave quality doesn't have to be >>>> super stellar, slight distortion would be ok. But I can't use a big boxy >>>> function generator since it has to be integrated in the tester. >>>> -- >>>> Regards, Joerg >>>> http://www.analogconsultants.com/ >>> https://www.sparkfun.com/products/9169? >>> you'd need a buffer but you said you didn't mind a bit of hacking >> Then I might a well just buy the bare chip, it's cheaper :-) >> > > but then you'll need a pcb, xtal regulator, etc. and have to build it > with this you just need a buffer amp. You don't have something laying > around with ~3-4x gain that can drive 50R? >
Oh, I can build it, just a simple amp. But another board to be roached in. If it has to be that way then so be it. I'd also have to build an LCD module, plus some sort of encoder for local control. -- Regards, Joerg http://www.analogconsultants.com/