AnsweredAssumed Answered

Sample rate AD9361

Question asked by Selwyn on Mar 11, 2017
Latest reply on Mar 20, 2017 by Selwyn

Hi,

 

I am working on PicoZed SDR zq7035. I am trying to set the sample rate to my desired rate. the default setting is:

/* BBPLL ADC R2CLK R1CLK CLKRF RSAMPL */

{983040000, 245760000, 122880000, 61440000, 30720000, 30720000},//rx_path_clock_frequencies[6]

/* BBPLL DAC T2CLK T1CLK CLKTF TSAMPL */

{983040000, 122880000, 122880000, 61440000, 30720000, 30720000},//tx_path_clock_frequencies[6]

 

My desired sample rate I want 30MSPS so I try set it to:

/* BBPLL ADC R2CLK R1CLK CLKRF RSAMPL */

{960000000, 30000000, 30000000, 30000000, 30000000, 30000000},//rx_path_clock_frequencies[6]

/* BBPLL DAC T2CLK T1CLK CLKTF TSAMPL */

{960000000, 30000000, 30000000, 30000000, 30000000, 30000000},//tx_path_clock_frequencies[6]

 

The console send out a failure error. Is it because I have to set a certain set of BBPLL freq and work out the rest of the sample rate via calculation based on the divider as well as the filter factor? The reason why I set 30Mhz the same for the last 5 is because I want to bypass the digital filter. Is my method of bypassing the filters done correctly?

 

I am using the bare-metal method.

 

regards

Selwyn

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