AnsweredAssumed Answered

RX Freeze when disabling TX

Question asked by cfauvel on Aug 4, 2016
Latest reply on Aug 5, 2016 by larsc

Hello,

 

When using the iioscope with the pre-build image for KC705 & FMCOMMS2 evaluation boards, we encounter an issue. The setup is as follow:

- Power up KC705

- Load FPGA and image with the run.tcl script (XMD)

- Open a new plot and select Voltage 0 & Voltage 1

- Just load a FIR filter (eg. LTE20MHz) and Enable FIR

- Use the FDD mode and leave all parameters to default settings

- Samples are received and plotted !

- Open the Debug page

     - Read the register 0x02

     - Write to the register 0x02 (clear bit D7)

     - Plot freeze, there is no more RX samples

     - Write to the register 0x02 (clear bit D6)

     - Plot restart but RXFIR seems disabled

     - Write to the register 0x02 (set bit D6 or D7)

     - Plot freeze

     - Write to the register 0x02 (set bit D7 or D6)

     - Plot restarts and everything is fine

 

It this a normal behaviour ? How can I fix this issue ? According to the datasheet and the reference manual, it seems that just writing to the registers 0x02 is required to enable/disable TX channels.

 

Best regards,

Christophe

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