while(1) {
    RX_POWERUP;
    mirf_CSN_lo; // Pull down chip select
    SPI.transfer(FLUSH_RX);  // Write cmd to flush rx fifo
    mirf_CSN_hi; // Pull up chip select
    mirf_CE_hi; // Start listening

    // Wait for incoming requests
    Serial.println("Scanning");

    int rfchannel = 0;
    while (1) {
      mirf_config_register(RF_CH, rfchannel);

      // Or focus on a specific channel
      //mirf_config_register(RF_CH, 2);

      mirf_CE_lo;

      mirf_CSN_lo; // Pull down chip select
      SPI.transfer(FLUSH_RX);  // Write cmd to flush rx fifo
      mirf_CSN_hi; // Pull up chip select

      mirf_CE_hi; // Start listening

      Serial.print("Channel = ");
      Serial.print(rfchannel, DEC);

      int delaytime = 0;
      int rpdcount = 0;
      while (delaytime < 32000) {
        delaytime++;
        if (rpd_status() == 1) {
          rpdcount++;
        }
      }

      Serial.print("  RPD = ");
      Serial.println(rpdcount, DEC);

      rfchannel++;
      if (rfchannel >= 125) {
        rfchannel = 0;
      }


    }
  }