ADF7242 CW no signal

Hi,

 We made 2 samples using our self-made PCB , and then tested the wireless output without any RF.
 Choose port 2 as the transceiver, we don’t have a demo board, so we can’t compare where the problem is.
 Our test code is as follows:

 ADF7242_reset(); 
 
  ADF7242_idle();
  ADF7242_FskRate(rfrate);//fsk RF RATE
  ADF7242_setMode(0x04);  //Set operating mode to GFSK/FSK packet mode
  ADF7242_SetFrequency(Channel);//设置信道
  ADF7242_syncWord(0x00, 0x00);
  ADF7242_cfgPA(15, 1, 7);       // Configure power amplifier (power, high power mode, ramp rate)
  ADF7242_cfgAFC(80);            // Writes AFC configuration for GFSK / FSK
  ADF7242_cfgPB(0x080, 0x000);   // Sets Tx/Rx packet buffer pointers
  ADF7242_cfgCRC(0);             // CRC - Disable automatic CRC = 1, else 0
  ADF7242_cfgBasicPreamble();    // FSK preamble configuration 

  //ADF7242_PHY_RDY();             // System calibration
 
  // Clear T/R buffer to all 0x00
  for(int i = 0x000; i < 0x100; i++)
  {
    ADF7242_regWrite(i, 0x00);
  }
  //0x080,Set packet length MSB数据包长度的高8位;
  //0x081,Set packet length LSB数据包长度的低8位;   
    for(unsigned char i = 0; i < 44; i++) 
    {
      ADF7242_regWrite((0x081+i), 1);
    }
    ADF7242_regWrite(irq1_src1, value);//置1,清除发射中断标志位 
    ADF7242_regWrite(tx_fsk_test, 0x02);
    ADF7242_PHY_RDY();
    ADF7242_transmit();   
    while(1);
We tested the hardware, the voltage is normal, and the status return value is A3. After checking the specification, it should be correct. Please help to see if there is a problem with the configuration.

void ADF7242_initFSK(unsigned char dataRate) {
  // Table 37. Settings common to all GFSK/FSK configurations
  ADF7242_regWrite(synt,0x28);
  ADF7242_regWrite(agc_cfg1,0x34); // from table 37
  ADF7242_regWrite(agc_max,0x80); // from table 37
  ADF7242_regWrite(agc_cfg2,0x37);
  ADF7242_regWrite(agc_cfg3,0x2A);
  ADF7242_regWrite(agc_cfg4,0x1D);
  ADF7242_regWrite(agc_cfg6,0x24);
  ADF7242_regWrite(agc_cfg7,0x7B);
  ADF7242_regWrite(ocl_cfg0,0x00);
  ADF7242_regWrite(ocl_cfg1,0x07);
  ADF7242_regWrite(irq1_en0, 0x00);
  ADF7242_regWrite(irq1_en1, 0x18);
  ADF7242_regWrite(irq2_en0, 0x00);
  ADF7242_regWrite(irq2_en1, 0x00);
  ADF7242_regWrite(irq1_src0, 0xFF);
  ADF7242_regWrite(irq1_src1, 0xFF);
  ADF7242_regWrite(ocl_bw0,0x1A);
  ADF7242_regWrite(ocl_bw1,0x19);
  ADF7242_regWrite(ocl_bw2,0x1E);
  ADF7242_regWrite(ocl_bw3,0x1E);
  ADF7242_regWrite(ocl_bw4,0x1E);
  ADF7242_regWrite(ocl_bws,0x00);
  ADF7242_regWrite(ocl_bw13,0xF0);
  ADF7242_regWrite(preamble_num_validate,0x01);
  ADF7242_regWrite(fsk_preamble,0x04);
  ADF7242_regWrite(tx_fd,0x03);//devition=30K
  ADF7242_regWrite(dm_cfg0,0x37);//BW=
  ADF7242_regWrite(tx_m,0x00);
  ADF7242_regWrite(dr0,0x01);
  ADF7242_regWrite(dr1,0xF4);
  ADF7242_regWrite(iirf_cfg,0x17); // from table 38
  ADF7242_regWrite(dm_cfg1,0x08);   ADF7242_regWrite(rxfe_cfg,0x16);  //收发端口选择
}

Parents
  • +1
    •  Analog Employees 
    on Jan 18, 2021 1:51 AM 2 months ago

    Hi Kanta,

    Since you're using your own custom board, the issue could come from the board itself, or from the device configuration. For the device configuration, please refer to page 66 to page 68 of the datasheet of the ADF7242. Sample configurations are also provided with the Evaluation Software of the ADF7242. Please also refer to page 71 of the datasheet on how to use the transmit test modes.

    I would also recommend to get an Evaluation Board of the ADF7242 to confirm your device configuration.

    Regards,

    edwinu

Reply
  • +1
    •  Analog Employees 
    on Jan 18, 2021 1:51 AM 2 months ago

    Hi Kanta,

    Since you're using your own custom board, the issue could come from the board itself, or from the device configuration. For the device configuration, please refer to page 66 to page 68 of the datasheet of the ADF7242. Sample configurations are also provided with the Evaluation Software of the ADF7242. Please also refer to page 71 of the datasheet on how to use the transmit test modes.

    I would also recommend to get an Evaluation Board of the ADF7242 to confirm your device configuration.

    Regards,

    edwinu

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