DDS 20 Function Generator Kit

[MeggerMan]

@Gregi,
Your board is fine, do not remove these bridges it is part of the design.
I think TheDane is misled.
So far I have built 6 kits and tested 3 completed boards so I can safetly say I think I know a little bit about it.

Regards
Rob

[Gregi]

Thanks MeggerMan,

I would've waited for your answer anyways, before doing anything (stupid) with my board. 
And Thedane could have mentioned that he never saw these boards before...  (though he never said he saw one either)
And just to make sure I've emailed the supplier, so they will surely confirm your answer shortly.

So, many thanks again I'll start soldering soon.

Greg

PS: Oh, and I think I'll need your help with testing the board (if you agree) before I hook it up to the PS. But I'll ask your help when the moment arrives.

[MeggerMan]

Hi Greg,
You can check it yourself via the diagram on page 6 anyway.
Pins 2 and 3 are joined together and connected to C43.
Pins 10,11,12,13 are connected to GND.

Time to start soldering I think.
Regards
Rob

[MeggerMan]

I'm currently working on my own function generator based on the AD9833 chip, but unfortunately programming isn't one of my strong abilities at the moment  - but I'm learning 
I seem to recall somebody saying that when you change the frequency parameters the generator outputs some digital noise on the output - has anybody seen this?  (I tried the search function, but found nothing  )

@TheDane,
You can look at the noise at various frequencies by refering to the spec sheet for the AD9833.
Its very low level and can be filtered out using some inductors and capacitors.
The output on the scope for the DDS 20 (based on the AD9835) is perfect.
Go for it.
Regards
Rob

[Thedane]

@MeggerMan

Imho: Shorting out pins should be done on the PCB - not on the pins. They even short the analog and digital grounds together, which in my book then requires a dedicated ground cross-point with a 0 ohm resistor (or small pcb track) between the two grounds - which I can't see they've done.

The noise I'm referring to is switching/sweeping noise - so it's only present when the chip is eg. sweeping frequencies.
(It might be me that misunderstood a post)
I'd be real happy if somebody can make an FFT on a sweeping signal 

It would be a shame to miss SM's magic frequencies due to noise in the signal caused by the function generator