VS_Set_Max_Output_Power() usage

Hi Vihang,

OK. Pleaes wait for a while.
It takes sometime to get logger trace.

Thanks and regards,
Koichiro

Please find in attachment the requested logs.
Power is changed from -30dB to -50dB with these cases.
# shows where the command is sent.

7026.Logger.zip

VS_Set_Max_Output_Power() does not work (command is sent via bluetooth)
Bluetooth_com_Oct11_1.lgr : #4269
Bluetooth_com_Oct11_2.lgr : #1659
Bluetooth_com_Oct11_3.lgr : #1650

VS_Set_Max_Output_Power() works (command is sent via UART)
command_Oct11_1.lgr : #1021
command_Oct11_2.lgr : #620
command_Oct11_3.lgr : #1429

Thanks and regards,
Koichiro

Hi Vihang,

Any updates for this item?

Thanks and regards,
Koichiro

Hi Vihang,

What is the purpose to try “normal” output power table here ?
As you confirmed, the HCI commands and responses are the same for both scenario and the table works for UART.
I thought the issue comes from somewhere else, not from the power table.

Thanks and regards,

Koichiro

Hi Koichiro-san,

1. The purpose of trying a higher power table is to eliminate any possible inaccuracies in power measurement at low output power.

2. Moreover, it might be worth doing another test to see if we can force the power table is updated instantaneously from the VS_Set_Max_Output_Power() API. Change the following line in the VS_Set_Max_Output_Power() API.

...
                  /* Send the second of two VS_DRPb_Enable_ Calibration */
                  /* Vendor Specific Commands.                          */
                  ASSIGN_HOST_BYTE_TO_LITTLE_ENDIAN_UNALIGNED_BYTE(&CommandBuffer[0],60);
                  ASSIGN_HOST_DWORD_TO_LITTLE_ENDIAN_UNALIGNED_DWORD(&CommandBuffer[1],0x00005ff0);
                  ASSIGN_HOST_BYTE_TO_LITTLE_ENDIAN_UNALIGNED_BYTE(&CommandBuffer[5],0x00);
...

to

...

                  /* Send the second of two VS_DRPb_Enable_ Calibration */
                  /* Vendor Specific Commands.                          */
                  ASSIGN_HOST_BYTE_TO_LITTLE_ENDIAN_UNALIGNED_BYTE(&CommandBuffer[0],60);
                  ASSIGN_HOST_DWORD_TO_LITTLE_ENDIAN_UNALIGNED_DWORD(&CommandBuffer[1],0x00005ff0);
                  ASSIGN_HOST_BYTE_TO_LITTLE_ENDIAN_UNALIGNED_BYTE(&CommandBuffer[5],0x01);
...

Best regards,

Vihang

Hi Vihang,

Customer tested #2 (changing VS_Set_Max_Output_Power() API), but results were the same.

Could you confirm the power vector can be modified while BT is connected?

Thanks and regards,
Koichiro

Hi Vihang,

Customer measured the power with spectrum analyzer and got below results.

1) VS_Set_Max_Output_Power() called via SPP
configured +12dBm => measured -47dBm
configured -30dBm => measured -40dBm
configured -50dBm => measured -40dBm

2) VS_Set_Max_Output_Power() called via UART
configured +12dBm => measured +0dBm

configured 0dBm => measured -12dBm
configured -50dBm => measured -55dBm

It seems no output power change was done if the command is sent via SPP even the called function is the same.

Thanks and regards,
Koichiro

Vihang,

I tested VS_Set_Max_Output_Power() at our Lab and confirmed it does not work if SPP is connected.
Please find in attachment the test results with spectrum waveforms.
TIJ_test.pdf
Could you investigate why SPP connection prevents power change ?

Thanks and regards,
Koichiro

Vihang,

Could you reply this item ?
Customer is still waiting an answer.

Thanks and regards,
Koichiro

Vihang,

Could you reply this item, please?

Thanks and regards,
KoT