The Error Vector Magnitude (EVM) performance of the Nordic7002EK in the 5G frequency band is not good

RE: The Error Vector Magnitude (EVM) performance of the Nordic7002EK in the 5G frequency band is not good

JONATHAN LL — Mon, 30 Sep 2024 16:01:57 GMT

Thanks,

On this version of board, we may not see expected output power across all channels.

So can you contact your sales contact and ask for a new board that that is trimmed and is FT_PROG_VERSION 4 or higher.

Regards,
Jonathan

RE: The Error Vector Magnitude (EVM) performance of the Nordic7002EK in the 5G frequency band is not good

zyan — Fri, 27 Sep 2024 03:37:44 GMT

Hi Jonathan,

Sorry for the late reply.

I got this board from your Nordic Semiconductor office in China. As for the error log, I think it might be caused by the wrong firmware I choose. Here is the test log and the data I obtained.

Send:

wifi_radio_test get_temperature

wifi_radio_test init 104
wifi_radio_test tx_pkt_tput_mode 1
wifi_radio_test tx_pkt_mcs 7
wifi_radio_test tx 1

wifi_radio_test get_temperature

Receive:

[11:13:52.745]Receive ←◆[m

[1;32muart:~$ [m
[11:13:53.747]Send ←◆[8D[J[00:00:00.258,239] [0m<inf> wifi_nrf_bus: SPIM spi@a000: freq = 8 MHz[0m
[1;32muart:~$ [m[8D[J[00:00:00.258,270] [0m<inf> wifi_nrf_bus: SPIM spi@a000: latency = 0[0m
[1;32muart:~$ [m[8D[J*** Booting nRF Connect SDK v3.5.99-ncs1 ***
[1;32muart:~$ [m[8D[J[1;32muart:~$ [m
[11:13:57.094]Send→◇wifi_radio_test get_temperature
□
[11:13:57.094]Receive←◆wifi_radio_test get_temperature

[11:13:57.199]Receive←◆[1;32muart:~$ [m
[11:13:58.098]Receive←◆[8D[J[00:00:04.612,182] [0m<inf> wifi_nrf: The temperature is = 19 degree celsius[0m
[1;32muart:~$ [m[8D[J[1;32muart:~$ [m
[11:14:05.074]Send→◇wifi_radio_test init 104
□
[11:14:05.090]Receive←◆wifi_radio_test init 104

[11:14:05.348]Receive←◆[1;32muart:~$ [m
[11:14:08.561Send→◇wifi_radio_test tx_pkt_tput_mode 1
□
[11:14:08.561]Receive←◆wifi_radio_test tx_pkt_tput_mode 1
[1;32muart:~$ [m
[11:14:10.380]Send→◇wifi_radio_test tx_pkt_mcs 7
□
[11:14:10.396]Receive←◆wifi_radio_test tx_pkt_mcs 7
[1;32muart:~$ [m
[11:14:12.751]Send→◇wifi_radio_test tx 1
□
[11:14:12.773]Receive←◆wifi_radio_test tx 1
[1;32muart:~$ [m
[11:15:36.375]Send→◇wifi_radio_test get_temperature
□
[11:15:36.375]Receive←◆wifi_radio_test get_temperature

[11:15:36.475]Receive←◆[1;32muart:~$ [m
[11:15:37.386]Receive←◆[8D[J[00:01:43.899,383] [0m<inf> wifi_nrf: The temperature is = 27 degree celsius[0m
[1;32muart:~$ [m[8D[J[1;32muart:~$ [m
[11:15:48.392]Send→◇wifi_radio_ficr_prog otp_read_params
□
[11:15:48.408]Receive←◆wifi_radio_ficr_prog otp_read_params

[11:15:48.439]Receive←◆[1;32mOTP Region is open for R/W
[m[1;32m
[m[1;32mPRODTEST.FT.PROGVERSION = 0xff0200ff
[m[1;32m
[m[1;32mPRODTEST.TRIM0 = 0x0099040c
[m[1;32mPRODTEST.TRIM1 = 0x0099d408
[m[1;32mPRODTEST.TRIM2 = 0x0099d808
[m[1;32mPRODTEST.TRIM3 = 0x009f040c
[m[1;32mPRODTEST.TRIM4 = 0x009fd408
[m[1;32mPRODTEST.TRIM5 = 0x009fd808
[m[1;32mPRODTEST.TRIM6 = 0xffffffff
[m[1;32mPRODTEST.TRIM7 = 0xffffffff
[m[1;32mPRODTEST.TRIM8 = 0xffffffff
[m[1;32mPRODTEST.TRIM9 = 0xffffffff
[m[1;32mPRODTEST.TRIM10 = 0xffffffff
[m[1;32mPRODTEST.TRIM11 = 0xffffffff
[m[1;32mPRODTEST.TRIM12 = 0xffffffff
[m[1;32mPRODTEST.TRIM13 = 0xffffffff
[m[1;32mPRODTEST.TRIM14 = 0xffffffff
[m[1;32m
[m[1;32mINFO.PART = 0x00007002
[m[1;32mINFO.VARIANT = 0x00423030
[m[1;32m
[m[1;32mINFO.UUID0 = 0x8b738e42
[m[1;32mINFO.UUID1 = 0x11ed7d78
[m[1;32mINFO.UUID2 = 0xe48304cc
[m[1;32mINFO.UUID3 = 0xb4158e5e
[m[1;32m
[m[1;32mREGION.PROTECT0 = 0x50fa50fa
[m[1;32mREGION.PROTECT1 = 0x50fa50fa
[m[1;32mREGION.PROTECT2 = 0x50fa50fa
[m[1;32mREGION.PROTECT3 = 0x50fa50fa
[m[1;32m
[m[1;32mMAC0.ADDRESS0 = 0x0036cef4
[m[1;32mMAC0.ADDRESS1 = 0x00009e13
[m[1;32mMAC0.ADDRESS = f4:ce:36:00:13:9e
[m[1;32m
[m[1;32mMAC1.ADDRESS0 = 0x0036cef4
[m[1;32mMAC1.ADDRESS1 = 0x00009f13
[m[1;32mMAC1.ADDRESS = f4:ce:36:00:13:9f
[m[1;32m
[m[1;32mCALIB.XO = 0x2b
[m[1;32mREGION_DEFAULTS = 0xfffffff1
[m[1;32m
[m[1;32muart:~$ [m
[11:15:50.697]Send→◇wifi_radio_ficr_prog otp_read_retrim_version
□
[11:15:50.712]Receive←◆wifi_radio_ficr_prog otp_read_retrim_version
[1;32m
PRODRETEST.PROGVERSION = 0xffffffff
[m[1;32m
[m[1;32muart:~$ [m
[11:15:53.493]Send→◇wifi_radio_ficr_prog otp_read_retrim_params
□
[11:15:53.508]Receive←◆wifi_radio_ficr_prog otp_read_retrim_params
[1;32m
[m[1;32mPRODRETEST.TRIM0 = 0xffffffff
[m[1;32mPRODRETEST.TRIM1 = 0xffffffff
[m[1;32mPRODRETEST.TRIM2 = 0xffffffff
[m[1;32mPRODRETEST.TRIM3 = 0xffffffff
[m[1;32mPRODRETEST.TRIM4 = 0xffffffff
[m[1;32mPRODRETEST.TRIM5 = 0xffffffff
[m[1;32mPRODRETEST.TRIM6 = 0xffffffff
[m[1;32mPRODRETEST.TRIM7 = 0xffffffff
[m[1;32mPRODRETEST.TRIM8 = 0xffffffff
[m[1;32mPRODRETEST.TRIM9 = 0xffffffff
[m[1;32mPRODRETEST.TRIM10 = 0xffffffff
[m[1;32mPRODRETEST.TRIM11 = 0xffffffff
[m[1;32mPRODRETEST.TRIM12 = 0xffffffff
[m[1;32mPRODRETEST.TRIM13 = 0xffffffff
[m[1;32mPRODRETEST.TRIM14 = 0xffffffff
[m[1;32m
[m[1;32muart:~$ [m

RE: The Error Vector Magnitude (EVM) performance of the Nordic7002EK in the 5G frequency band is not good

JONATHAN LL — Wed, 18 Sep 2024 10:59:17 GMT

Update:

Thanks for the logs. From the OTP parameters, FT.PROGVERSION is 2 and it is not retrimmed. Can they test on a chip with FT.PROGVERSION is 5 (or higher) or PRODTEST.PROGVERSION is 5 (or higher).

Can you also share where you got the EK's with FT.PROGVERSION is 2?

Regarding error log, we do not observe this problem when we execute this command. What is the codebase used here? Is it custom code or one of NCS releases?

Please get the details. If it is your own code then we need source code and ELF for debugging the problem.

Regards,
Jonathan

RE: The Error Vector Magnitude (EVM) performance of the Nordic7002EK in the 5G frequency band is not good

JONATHAN LL — Thu, 05 Sep 2024 11:48:02 GMT

Thanks Yan, will look in to this.

RE: The Error Vector Magnitude (EVM) performance of the Nordic7002EK in the 5G frequency band is not good

zyan — Thu, 05 Sep 2024 08:04:46 GMT

Hi,Jonathan

When I sent the command wifi_radio_test get_temperature, I got an error and could not perform the EVM test. The error log is in text1.txt, and for the OPT test, the log is in text2.txt.

devzone.nordicsemi.com/.../6036.test1.txt devzone.nordicsemi.com/.../text2.txt

RE: The Error Vector Magnitude (EVM) performance of the Nordic7002EK in the 5G frequency band is not good

JONATHAN LL — Tue, 03 Sep 2024 07:20:21 GMT

[quote user="zyan"]here is the OPT data by executing the wifi_radio_ficr_prog otp_read_retrim_params.[/quote]

From the OTP data, this board does not have any configured data in re-trim region. Can you please execute following commands and provide us log?

wifi_radio_ficr_prog otp_read_params

wifi_radio_ficr_prog otp_read_retrim_version

wifi_radio_ficr_prog otp_read_retrim_params

Regards,
Jonathan

RE: The Error Vector Magnitude (EVM) performance of the Nordic7002EK in the 5G frequency band is not good

JONATHAN LL — Mon, 02 Sep 2024 12:20:14 GMT

Please conduct one more experiment. Execute following command sequence in channel 104 in which EVM is failing.

wifi_radio_test get_temperature

wifi_radio_test init 104
wifi_radio_test tx_pkt_tput_mode 1
wifi_radio_test tx_pkt_mcs 7
wifi_radio_test tx 1

wifi_radio_test get_temperature

Note down EVM after above sequence is executed. Share temperature log before and after executing the sequence and please share FICR information as well.

Regards,
Jonathan

RE: The Error Vector Magnitude (EVM) performance of the Nordic7002EK in the 5G frequency band is not good

zyan — Wed, 28 Aug 2024 08:45:52 GMT

Hi, Jonathan

Sorry for my late reply. We received another 7002EK board and got the same issues as with the previous one, here is the OPT data by executing the wifi_radio_ficr_prog otp_read_retrim_params.

RE: The Error Vector Magnitude (EVM) performance of the Nordic7002EK in the 5G frequency band is not good

JONATHAN LL — Mon, 19 Aug 2024 13:22:41 GMT

No, based on our observations EK is slightly better compared to DK.
Following is measurement data on EK board#96. We do not see EVM failures.

NCS Version	DUT Device	Band	Pattern	Channel	Rate	Default Power	Measured Power	EVM
2.7.0	QFN EK#96	2.4 GHz	G	1	54M	16	14.86	-32.8
				6	54M		15.02	-31.3
				13	54M		15.35	-32.7
			N	1	MCS7		14.68	-32.1
				6	MCS7		14.87	-31.2
				13	MCS7		15.16	-31.9
		5 GHz	N	36	MCS7	13	11.84	-30.7
				104	MCS7	13	12.08	-31.8
				149	MCS7	12	11.86	-31.7
			AC	36	MCS7	13	11.8	-32
				104	MCS7	13	12.03	-32.4
				149	MCS7	12	11.82	-32

There is no provision for adjusting power except during production test. The chip may have been production tested and optimal settings are configured in OTP. Please share OTP data by executing the following command wifi_radio_ficr_prog otp_read_retrim_params

RE: The Error Vector Magnitude (EVM) performance of the Nordic7002EK in the 5G frequency band is not good

JONATHAN LL — Mon, 22 Jul 2024 06:56:06 GMT

Have forwarded the questions and will update you when I have some answer for you Zhang.

Regards,
Jonathan

RE: The Error Vector Magnitude (EVM) performance of the Nordic7002EK in the 5G frequency band is not good

zyan — Fri, 19 Jul 2024 06:06:31 GMT

Hi，Jonathan

1. We added the losses between RFpin and SMA connector.

2. I downloaded the latest sdk 2.7.0 and tried again, it did not work, here is the data I got.

And I want to ask the following questions:

1. Does the nrf5340DK combined with the nrf7002EK perform worse than the nrf7002DK in testing? I think the nrf7002DK might perform better.

2. Do you have reference data for the EVM test of the nrf5340DK with nrf7002EK?

3. Is there a way to adjust the power settings in the register or OTP for the nrf7002 module? This adjustment could potentially resolve the issue and help us with out production testing.

If this performance is the best that the module can do, we might accept it.

Thanks for your help!

RE: The Error Vector Magnitude (EVM) performance of the Nordic7002EK in the 5G frequency band is not good

JONATHAN LL — Mon, 15 Jul 2024 09:20:59 GMT

Hi zyan ,

Our measurements in product spec are taken at the output of RF. Please compensate for PCB losses or any other losses between RF pin and SMA connector.
Get power measurements without issuing tx_power command (i.e., wifi_radio_test tx_power 18 in your command sequence below) . This will provide measurements with default tx power settings. Use NCS 2.7.0 codebase for these measurements.

RE: The Error Vector Magnitude (EVM) performance of the Nordic7002EK in the 5G frequency band is not good

JONATHAN LL — Thu, 11 Jul 2024 10:59:25 GMT

Thanks! have forwarded internally and will update when i have something.

RE: The Error Vector Magnitude (EVM) performance of the Nordic7002EK in the 5G frequency band is not good

zyan — Thu, 11 Jul 2024 08:58:24 GMT

devzone.nordicsemi.com/.../7180.zephyr.hex

Hi, Jonathan

Thanks for your replay.

1. We measured at the output of SMA connector.

2. We use the commands from wifi radio test, here is an example about how we test G mode in channel 2412.

wifi_radio_test init 1
wifi_radio_test tx_pkt_tput_mode 0
wifi_radio_test tx_pkt_rate 54
wifi_radio_test tx_power 18
wifi_radio_test tx 1

3. Sure, here is the version of my build environment, and I upload the radio_test 's .hex file for 5340DK & 7002EK if you need it.

RE: The Error Vector Magnitude (EVM) performance of the Nordic7002EK in the 5G frequency band is not good

JONATHAN LL — Thu, 11 Jul 2024 07:01:12 GMT

Hi zyan ,

All our measurements refer to output of RF pin. Are the power numbers measured (by you here) refer to output of RF pin? Or measured at the output of SMA connector?
What is the command sequence used for these measurements? Please share the command sequence.
Please confirm that hex shared by customer is built with NCS release 2.6.x codebase.

RE: The Error Vector Magnitude (EVM) performance of the Nordic7002EK in the 5G frequency band is not good

JONATHAN LL — Thu, 11 Jul 2024 06:59:17 GMT

Can you (responsible_duck ) create a new ticket here on Devzone? Link to this ticket as well in that new ticket and we will follow up.

RE: The Error Vector Magnitude (EVM) performance of the Nordic7002EK in the 5G frequency band is not good

responsible_duck — Thu, 11 Jul 2024 01:34:37 GMT

Hi JONATHAN LL just to add, we are seeing similar behavior (unrelated to the original poster or project).

RE: The Error Vector Magnitude (EVM) performance of the Nordic7002EK in the 5G frequency band is not good

JONATHAN LL — Mon, 08 Jul 2024 06:44:13 GMT

Thanks, I will have forwarded the info to our experts and will update you if we need anything more or have some results or comments.

Regards,
Jonathan

RE: The Error Vector Magnitude (EVM) performance of the Nordic7002EK in the 5G frequency band is not good

zyan — Sat, 06 Jul 2024 03:50:15 GMT

devzone.nordicsemi.com/.../3312.zephyr.hex

Hi, here are the details about the power and EVM values I measured with the 2.6.0 SDK and the 2.7.0 RC2 SDK, along with the .hex file I used.

RE: The Error Vector Magnitude (EVM) performance of the Nordic7002EK in the 5G frequency band is not good

JONATHAN LL — Wed, 03 Jul 2024 20:35:00 GMT

Hi,

Can you share more info for us to reproduce:

Test results with latest NCS (2.7.0 rc) - please specify the NCS SHA used in your testing
Test setup, NCS sample used for testing and detailed test procedure will really help us understand better (hopefully all cables used are calibrated?)
Can you share the hex file that you are using for nRF5340DK+nRF7002EK board?
Any VSA EVM measurement plots will be very useful.

RE: The Error Vector Magnitude (EVM) performance of the Nordic7002EK in the 5G frequency band is not good

JONATHAN LL — Tue, 02 Jul 2024 08:21:41 GMT

Will look in to this and see what other options you can test as well, will update when I have more info.

Regards,
Jonathan

RE: The Error Vector Magnitude (EVM) performance of the Nordic7002EK in the 5G frequency band is not good

zyan — Tue, 02 Jul 2024 08:03:14 GMT

Hi,

Sorry for the late reply, We tried 2.7.0 SDK but do not solve the problem. Could you please let us know if this board has registers that store power amplification values? So we can reduce the EVM value by lowering the power.

Thank you!

RE: The Error Vector Magnitude (EVM) performance of the Nordic7002EK in the 5G frequency band is not good

JONATHAN LL — Thu, 20 Jun 2024 11:56:10 GMT

Hi,

Can you test with NCS 2.7.0 RC2 (latest main)? This should hopefully solve the issue.

Regards,
Jonathan

RE: The Error Vector Magnitude (EVM) performance of the Nordic7002EK in the 5G frequency band is not good

zyan — Thu, 20 Jun 2024 05:47:09 GMT

Hi,Jonathan

Thanks for your quick reply. I used the radio_test sample and my NCS version is 2.6.0.

RE: The Error Vector Magnitude (EVM) performance of the Nordic7002EK in the 5G frequency band is not good

JONATHAN LL — Wed, 19 Jun 2024 13:23:18 GMT

Will look in to this and provide more info later on.

Can you share what NCS version you are using?

Regards,
Jonathan