Hi Hung Le,

You should follow startup sequence described in AN633. Also make sure your software and Saleae observe the same pin. You can observe also CTS as a logic signal on GPIO1.

Regards,

Tamás

Hi,

I have tried what you describe and I saw the same correct behavior of TX_STATE in both cases, regardless of the TXCOMPLETE_STATE setting (3 or 6). Please doublecheck. You can use the TX_DATA signal on another GPIO as a reference. If no success, let me know your START_TX command stream.

Tamás

Hi,

    You can use 868MHz reference design for your 865-867MHz band. Please read the following application note for reference circuits:

https://www.silabs.com/documents/public/application-notes/AN648.pdf

Regards,

Jun

Hi Vegard,

     What's your performance difference requirements between 868MHz and 915MHz?  I think you can use each reference circuits for both band if the difference < 1dB. You can compare it if you have the demo boards. You can get refer to following application note for the reference circuits: https://www.silabs.com/documents/public/application-notes/AN648.pdf

Regards,

Jun

ModRF,

Apply the filter with 2FSK configuration with H=0.5 (i.,e deviation is 1/4th the DR). Let me know if it is still not working. Also attach a phase demod screenshot. 

Regards,

Zoltan

Cat big,

The answer to your question is detailed in chapter 3.6 in AN 734.

WDS calculates the Rx configuration so that it would tolerate worst case frequency offsets as indicated by the  XO accuracy parameter. In your case this is 20 ppm. The shift, however you see from 470.001 MHz to 470.030 MHz is 29 kHz that translates to 61 ppm, which is way more than the you input to WDS. It may be your XO that is out of spec, so a check on that.

Regards,

Zoltan

Hi,

I suppose this issue is permanent and not intermittent.

Are you aware that replay stream of most API commands can be read via a separate command called  READ_CMD_BUFF?

See also timing requirements at https://www.silabs.com/community/wireless/proprietary/knowledge-base.entry.html/2017/04/06/si4x6x-c2a_si4x55-c-8Lg0 and startup sequence on page 25. of https://www.silabs.com/documents/public/application-notes/AN633.pdf

Make sure also that your crystal works properly. It is recommended to test your startup code on a known good eval board first,to be shure the issue is SW related.

Regards,

Tamás

Hello

Si4468 A2A proprietery board with RFswitch controled from GPIO3 that is configured as TX_STATE output pin.

When execute for first time the START_TX command with TXCOMPLETE_STATE state parameter equal to RX_TUNE, the GPIO3 does not go to LO state after finish transmission.
Even the chip goes to RX state or READY state  by send the appropriate command , the pin remains HI.
In case that transmits with TXCOMPLETE_STATE = STATE_READY, everything goes fine as expected.
I changed the chip with Si4463B1B and i observed the same behaviour.
The WDS script is attached

Low duty cycle demo project is based on RAIL and it is not available for Connect for the Sink to wake up periodically to enter receive mode.

Perhaps you can place the sink into low power mode for some time by enabling sleep/idle plugin to save more power.

Thanks

Juanyong

I tried with BRD4168A (EFR32MG13 2.4GHz 19dBm radio board which uses EFR32MG13p732F512GM48) under SDK2.7 and there is no such error.

I also tried to change the chip part number(in .isc file -->General") to EFR32MG13P732F512GM32 and remove the LED and BUTTON definition (since the GPIO is different in different chip package ) and there is no issue found.

Thanks,

Juanyong