Other Parts Discussed in Thread: SYSCONFIG,
Hello all,
My used tools:
- CCS 10.2.0; Compiler TI V20.2.5.LTS
- SDK cc32xx_sdk_4_40_00_07
- SysConfig 1.8.0
- XDCtools 3.62.0.08
I took a signal output measurement of a customer specific board.
Because I am not an HF-Boy ;) I have some problems in understanding the result.
The board is on the measuring table. It is not built into a housing.
The application is based of the network terminal example.
In contrast to that it avoids any input, didn't wait before calling the radioTool_TxStart.
The process of continuous sending is never stopped.
The sources of test program used are attached to this ticket (only the pins for the LED and the UART are configured).
The function radioTool_TxStart is called with the following parameters:
i32_Result = radioTool_TxStart(
e_TxMode, // TxMode_Continues
e_Channel, // 6
e_RateIndex, // SL_WLAN_RATE_1M
e_Preamble, // Preamble_longMode
e_DataPatternIndex, // DataPattern_all_1
u8_TxPower, // 0, PowerLevel_HighGainStep_7
u16_PacketSize, // 24
u16_PacketAmount, // 1000U
u32_DelayPeriod, // 1
u8_OverrideCCA, // 1
e_SlTxInhibitThreshold_e, // u32_DelayPeriod
i8_Tone, // 0
au8_DestMac); // {0x01, 0x23, 0x45, 0x67, 0x89, 0xAB}
The data sheet SWRS206E – MARCH 2017 – REVISED MAY 2021 of the CC3220MODA module states for the Wi-Fi TX power:
* 17.0 dBm at 1 DSSS
* 13.5 dBm at 54 OFDM
Because I can only measure in dBuV I used a webtool that translates the value 17dBm to 124 dBuV.
* module sends continuously (picture measure01.png):
* carrier around 2437 MHz (channel 6)
Unexpected:
But the power is less than expected. I can't see the expected power around 124 dBuV. At best I see peaks of around 90 dBuV.
What's going wrong in my case?
Perhaps settings OverrideCCA=1 and SL_WLAN_RATE_1M are the cause of my unexpected result?
Any suggestion is very welcome.
Best regards,
Roman