AFE7071: qmc

Hi Ljj Jason,

We are taking a look into your question, and will be back with you soon.

Best Regards,

Dan

hello dBrock,

can i have your number?or even how can i contact with you?  

Hi Dan ,
thank you all the same!
the LO freethrough is well done within your help .however,i cannot adjust and cancell the DC offset(sideband image),there are huge amount of parameters combination ,even if i increased the factor of the phase by 20(range of 1024) while the other parameters are settled,as well as adjuesting the Gaina and Gainb(range of 2048),it is really troubled me .
could you please help ??
looking forward your help
thank you a lot

Hi Ljj Jason,

Are you using the AFE7071EVM evaluation module? When you change these QMC parameters, do you notice any change (do they appear to be functioning)?

Are you enabling the QMC and offset first?

It would be helpful if you could share your register configuration and any other setup information.

Best Regards,

Dan

Hi Dan,

I didnot use the AFE7071EVM .I had enabled the QMC、offset first and there is  little change functioned with the sideband image,before adjusting the imbalance,I 

have chosen the better filter_tune.even more i have had my hardware environment examined.so,that is really incredible.

THANKS!!!

Hi，Dan

the register 0x05,I configured as CA, the detail reigsters are configured as follows:

00-B2

01-90

02-00

03-DC

04-0F

05-CA

06-00

07-13

0B-06

09-00

0A-FE

08-FF

0F-64

0E-FF

0D-00

0C-00

I have adjusted the baseband of the filter to 1 MHz,the side suppresion and LO feedthrough cannot be bucked to what really I expected even i have adjusted the better register-configuration.that is really troubled  me .Looking forward your careful help.

THANKS!!!

Ljj Jason

Hi Ljj Jason,

Could you please provide the DAC pattern file that you are using and other setup parameters (clock frequency, LO, etc..)? That will make it easier for me to replicate your issue on my setup. Any images that you can provide of the output, and what you find to be out of specification will also be helpful.

Best Regards,

Dan

Hi dBrock,

I have almost adjusted the QMC done,it is the timing that matters a lot,eventually,the LO feedthrough even the images comes down within the help of my teammeat

thank you all the same!!

Best Regards,

Jason Ljj