Application Note AS3930 – Description of Demosystem
Version 1.0, Date: 09/03/2010
www.austriamicrosystems.com/AS3930
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Regardless which mode is chosen, when the AS3930 wakes up the RSSI LEDs show the RSSI level, as it is
read out from the R10<4:0> of the AS3930. the RSSI therefore will be shown as binary representation where BIT4
is the MSB and BIT0 the LSB.
The Jumper next to the RST button allows measuring the current consumption of the only AS3930 with the
help of a tester.
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Overview of the TX board
The LF Transmitter Board (TX-board) consist of a 9-12V DC plug, a microcontroller, an antenna and 5 buttons.
The TX-board needs to be connected to the power supply provided in the kit. The power supply has to be
connected to the power line with an appropriated cable (not included).
Power
Supply
Plug
Buttons
PREMO EMITTER
ANTENNA
KGEA-BFCR-B-0500J
The carrier frequency of the TX-board is 125 kHz.
On the board 5 buttons are present:
RST_MCU
: this button resets the system and sets the board in a standby mode (no signal is produced on the
antenna) this button has to be pushed every time after powering on the board.
PATT1
: pressing this button the board will send only one time the Pattern1 (96)h –Manchester- following the
preamble. When the Pattern1 is sent no more activity will be present on the antenna.
