I am trying to use about a 9 year old AD9910 Eval Board to generate a range of sine waves say upto 400Mhz.
Unfortunately, I feel there are issues with it. There is an output- though but it appears distorted and I am unable to get it locked.
The signal appears to be like a frequency modulated wave even if I am using this in the normal mode.
Checking the signal at the SYNC-CLK (J9) also one sees a similar waveform. This is puzzling.
Earlier when i was using Windows XP, it had worked well. But now I have upgraded to windows 7 pro version- 32 bit.
Would this be the cause of the misbehaviour?
or what could be the problem????
Thanks in advance.
The EVB software should install/operate properly with Windows 7. I suspect a setup issue of some sort.
I have reinstalled it. I have the older version 1.0 of the software. Even after reinsatllation the output is the same.
I tried to install the new version 2.1.0; but with this, the software doesn't even detect the Eval board and AD9910.
Any hardware settings issue could be suspected? or any thing to convey what could be problem.
The waveforms are so unstable and i can't monitor them on the scope for a measurement.
If you are using version 2.1.0 of the evaluation board software, you should also reflash the EEPROM using the USB Evaluation Board Programmer.
To Reflash the EEPROM
1) Download and install the USB Evaluation Board Programmer.
2) Power the board off and then remove jumper W3.
3) Power the board back up.
4) Reinstall jumper W3.
5) Run the USB Evaluation Board Programmer. The board should be listed as Ezusb-0.
6) Select "AD9910 Eval Board (32/64-bit)" in the "Select Evaluation Board Identity" section.
7) Click the Program EEPROM button.
8) Power the board off and back on again.
The evaluation board software should connect to the evaluation board now.
If I am rightly understanding, I should undertake the following steps:
1) Uninstall the present 1.0 version from the PC and install the 2.1.0 version that is currently available on the net.
2) Download and install the USB Eval board Programmer as in the link provided above by you...
3) Reflash the EEPROM by following steps 1 to 4.
4) If possible, would like to know, what is the role of W3 jumper?
5) Just a little confusion in step 3 and 4. After powering the board; should the jumper W3 be put back immediately ??? (while the power in ON?) Please clarify step 4.
You can just install version 2.1.0 which should uninstall version 1.0 for you.
On power up the USB Controller (U7) reads the board identity from the EEPROM (U3).
If W3 is not installed on power up, the USB Controller cannot read the identity from U3, and uses a default identity.
W3 should not be installed when powering up the board, so that the USB Controller will use the default identity, but should be reinstalled after the board is powered up so that the USB Evaluation Board Programmer can write the new identity to the EEPROM (U3).