I did some more tests on my AD9959 board this evening. The board uses a 125MHz can oscillator. I measured the board current consumption at various multiplier setting.
Mult. Current(Amps) None .22 X4 .37 X5 .42 X6 .47 Note that with a X6 multiplier, the internal clock was 750MHz. I was getting correct output frequencies at that speed(I tried X7 or 875MHz internal - it appeared to lock at X6 instead). So, apparently these 500MHz rated chips will overclock!! I could hardly tell the AD9959 was warm with the finger test. The only thing that got fairly warm was the 1.8V regulator(it was being fed with 5V). My scope only goes to 20MHz,. But, the squarewaves and the phase offsets looked ok up to 10MHz(didn't try above that due to the scope). I was able to verify proper frequency output up to 175MHz with my cheap frequency counters. I also programmed 3856KHz and listened on my receiver. Sounded like a pure tone with no hum. Dave - WB6DHW ------------------------ Yahoo! Groups Sponsor --------------------~--> Protect your PC from spy ware with award winning anti spy technology. It's free. http://us.click.yahoo.com/97bhrC/LGxNAA/yQLSAA/ELTolB/TM --------------------------------------------------------------------~-> Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/soft_radio/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
