User's Manual

AVR0000

0001B-AVR-10/09

3 Firmware Description

3.1 Prerequisites

Before power-on the DUT by moving (Sw) to (ON) position, ensure the DUT is

equipped with two AAA batteries. These batteries are to be placed at the back side of

the DUT in the battery holder. Pay attention to the correct polarity of the batteries.

3.2 Power-On and Configuration

There are two possibilities to power-on the DUT:

1. Without DUT configuration update,

2. Configuration mode (press (Button) during power-on).

The next sections describe different ways to power-on a DUT in detail.

3.2.1 Without DUT Configuration Update

The first choice is the standard selection to power-on the DUT.

To select operation without radio transceiver configuration update, power-on the DUT

by switching (Sw) to (ON) position. Do not press the (Button).

There are two possible system configurations:

• The very first power-on cycle (factory reset) enables operation at maximum TX

output power and standard PSDU data rate. The DUT starts at test mode state “0”,

refer to section 3.3.

• All other power-on cycles remember the last radio transceiver configuration and

test mode selection before last power-off cycle.

If available, the LED indicating the reset state (LED_R) is on for a short time. Once

this LED is off again, the microcontroller is waiting for a new (Button) command.

3.2.2 Configuration Mode

Power-on the DUT in configuration mode allows either:

• Reset to factory configuration, and, if required

• Selection of TX output power and/or PSDU data rate, see references [1…2].

To do this, press and hold the (Button) before power-up the DUT. Once the DUT is

powered on, the three state LED’s (LED_0 … LED_2) are switched on. Further

handling of the (Button) determines the next configuration options.

3.2.2.1 Factory Reset

If the (Button) is pressed during power-on and immediately released afterwards,

factory reset configuration is loaded.

If TX output power has to be switched to the minimum value do not release the

(Button) within two seconds, for details refer to 3.2.2.2.