WL1835MOD: BT RF testing

Hi,

I will look into it and get back to you, this week.

BR,

Jessica M. Torres

Could you please respond to it today?

thanks. There are some follow up questions. Please help answer. would greatly appreciate if you answer the questions at the earliest. 

The Wi-Fi radio is working including 2x2 MIMO, but I do have a few questions about the commands as follows:

• For the tune_channel command, I am unsure if there is any difference between using 0 or 1 for the last parameter for <bandwidth>.  The document says “0/1 (20MHz)”.  Are the 0 and 1 values interchangeable, or is there a difference between them?  The example at the bottom of page 3 uses 0, but the examples on pages 8-11 use 1 (or 2 or 3).
• For the set_tx_power command, I would like to know what values I should use for the <output_power> and <channel_limitation> parameters.  All the examples on pages 8-11 use 20000 (20dBm) and 1 (enabled), respectively.  Does the INI file contain the power limits you want to use for testing?  If so, then these settings make sense to me.  If not, then please let me know what you want me to use as a starting power setting for the testing.
• For the start_tx command, I assume the last row in Table 3-4 is an error and can be ignored.  It seems to be a duplicate of the second parameter <rate>, and does not appear to be used in any of the examples.
• In Table 3-5 with the rate definitions, rate 20 is shown in the MIMO / 40M column; however, I have found that there is no signal on ANT 2 when I use this rate, whereas all the other rates in the column (21-27), do cause 2x2 MIMO signal transmissions.  Could you please check into this and let me know if that rate is supposed to produce 2x2 MIMO?

The document that is being referenced is https://www.ti.com/lit/ug/swru562/swru562.pdf?ts=1676537485433

Hi Jessica,

Can you help answer question #2 and #4 today? The certification lab folks need answer and its urgent.

• For the set_tx_power command, I would like to know what values I should use for the <output_power> and <channel_limitation> parameters.  All the examples on pages 8-11 use 20000 (20dBm) and 1 (enabled), respectively.  Does the INI file contain the power limits you want to use for testing?  If so, then these settings make sense to me.  If not, then please let me know what you want me to use as a starting power setting for the testing.
• In Table 3-5 with the rate definitions, rate 20 is shown in the MIMO / 40M column; however, I have found that there is no signal on ANT 2 when I use this rate, whereas all the other rates in the column (21-27), do cause 2x2 MIMO signal transmissions.  Could you please check into this and let me know if that rate is supposed to produce 2x2 MIMO

Regards

Hello,

Apologies for the delay, have been out of office for the long weekend. Will look into the issue today and get back to you as soon as possible.

I am awaiting your response. I need it today. Thanks.

The exact commands used for setting rate 20 are as follows:

calibrator wlan0 wl18xx_plt tune_channel 1 0 1

calibrator wlan0 wl18xx_plt set_tx_power 20000 0 0 1 0 0 0 1 0 0 0 0

calibrator wlan0 wl18xx_plt start_tx 200 20 4065 0 0 1 0 0 00:11:22:33:44:55 01:02:03:04:05:06 0

Please help answer at the earliest these questions

I am still looking into it and will update you on Friday.

The certification lab is asking for a reply and I have been waiting since more than a week now for this. Please help answer this today.

Hi Jessica,

The customer also mentioned:

 "We can’t confirm if the issue is seen elsewhere but this is an observation seen on WL183x on our custom hardware by the certification lab."

Please do comment further on the 2) looking into issue further.

Thanks so much,
Chris