AN4494

Output power test

7

Output power test

7.1

Test case specification identifier

OUTPUT_TESTS

7.2

Test prerequisite

For this test the UFL or SMA connector is mandatory.

7.3

Test description

The aim of this test is verification of the Tx output power level and the step linearity.

7.4

Test setup

7.4.1

Hardware

A spectrum analyzer is required for this test.

7.4.2

Software

ST BlueNRG GUI, to emit a frequency tone.

7.5

Test procedure

Connect the BlueNRG board to the spectrum analyzer through an RF cable.

Set the spectrum analyzer to: Res BW = 100 KHz, SPAN = 500 KHz.

Power up the BlueNRG platform.

The default configuration of the command BLUEHCI_HAL_SET_TX_POWER_LEVEL is

with the parameter En_High_Power=0x01 (High power mode) and PA_level=0x07

(+8dBm).

To use the BlueNRG in TX Standard mode, use this command with the parameter

En_High_Power=0x00.

Generate a carrier wave tone at Ch0 (freq. 2.401750 GHz) using the ACI command:

HAL_TONE_START (a tone can be emitted at f=2402 + k*2 - 0.250 MHz, with k=0 to 39).

For the step linearity of the Tx output power use the command:

BLUEHCI_HAL_SET_TX_POWER_LEVEL (PA_Level: 0x06).

7.6

Expected results

With PA_level=0x07:

High power mode: around 8 dBm

Standard power mode: around 5 dBm

With PA_level = 0x06:

High power mode: around 4 dBm

Standard power mode: around 0 dBm

DocID026361 Rev 3

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