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#1 2017-Apr-19 09:45:18

bigvolcan
Member
Registered: 2017-Apr-19
Posts: 3

spure signals at adc output

hi
I purchased a warp eval kit3 board  and i have some problems with it , the noise from the ADC looks like a sine wave ,
I changed the channel frequency (band 5 ghz)  but i get always the same result , is this due max2829 or AD9963 please help

attached image in following link

https://ibb.co/bHgkvk


the red is imaginary part and blue is the real part

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#2 2017-Apr-19 11:43:02

murphpo
Administrator
From: Mango Communications
Registered: 2006-Jul-03
Posts: 4615

Re: spure signals at adc output

What is the serial number of your kit (W3-a-NNNNN)? I can check our records for its manufacturing calibration data.

Are you using one of our reference designs (i.e. WARPLab)?

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#3 2017-Apr-19 12:25:25

bigvolcan
Member
Registered: 2017-Apr-19
Posts: 3

Re: spure signals at adc output

no I use a custom code and  i delete every thing in the eeprom, did you see this phenomena in other board
please can you tell me the procedure to correct this issue

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#4 2017-Apr-19 12:29:18

murphpo
Administrator
From: Mango Communications
Registered: 2006-Jul-03
Posts: 4615

Re: spure signals at adc output

no I use a custom code and  i delete every thing in the eeprom

The serial number is also printed on a label on the top of the board, just to the right of the SO-DIMM.

did you see this phenomena in other board, please can you tell me the procedure to correct this issue

I would recommend starting with our WARPLab Reference Design and verifying the Tx/Rx I/Q signals are clean with this known-good design. Otherwise you'll have to provide more details about your custom design for us to help. A sinusoid in the Rx I/Q signal could be caused by many things.

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#5 2017-Apr-19 12:53:04

bigvolcan
Member
Registered: 2017-Apr-19
Posts: 3

Re: spure signals at adc output

in my design i configured the ad9963 and max2829 and the clock generator as described in your code , the transmitter path is functional , the only problem is with rx path ,

A sinusoid in the Rx I/Q signal could be caused by many things.

can you list this things that can cause this problem

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