AFE7444: RF loopback is not pass

ganesh singh1

Intellectual 400 points

Part Number: AFE7444

Hi ,

In one of our custom Board, RF loopback is not passing, Cna you tell me how to debug this?

TX NCO tone can be seen out of DAC. PLL is also locked.

With Regards,

Ganesh

over 1 year ago

0 jim s over 1 year ago

TI__Guru* 91947 points

Ganesh,

We are looking into this.

Regards,

Jim

0 Vijayendra Varma Siddamsetty over 1 year ago in reply to jim s

TI__Genius 10645 points

Hi Ganesh,

Did you try the register config you use for RF loopback on your custom board on an AFE7444EVM to rule out issues with config file?

Can you also provide details of mode you are using?

Regards,

Vijay

+1 ganesh singh1 over 1 year ago in reply to Vijayendra Varma Siddamsetty

Intellectual 400 points

Hi Vijay ,

Its passing now . the error is in the LMK locking . Its showing lock and AFE is also showing lock. But if you see the DAC output its clear that clocks are not Phase locked properly. By changing the LMK CPLL2 filter value its solved.

Thanks for the help

Wth regards,

Ganesh

RF & microwave

RF & microwave forum

AFE7444: RF loopback is not pass