4.2 Initial TX Power Setting

The output power can be fine-tuned in steps of ~±0.2 dB from the default setting of 8 with the parameters:

  • Preamble: txpa_pac_bias_PA[3:0]
  • Synch Word: txpa_pac_bias_SW[3:0]
  • Data Payload: txpa_pac_bias[3:0]
  • Postamble: txpa_pac_bias_PO[3:0]

The following figure shows curves for the TX average power, within the 10 dB bandwidth boundaries, for a composite bandwidth of 610 MHz with three curves for txpa_pac_bias parameters 0, 8 and 15. All of the curves apply to the same setup for the preamble, synch word, data payload and postamble.

Figure 4-1. TX PA Setting txpa_sel_pwr[3:0]

For measurements regarding regulation requirements, the active TX period within a 1 ms interval has to be considered; that is, the continuous preamble TX mode must be corrected to these requirements or the Verifier mode has to be used when no prover device is in detection range.