AMS AS3933 Manual - Página 11

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AS3933 Standard Board

4.2.16 Symbol Rate

The symbol rate can be adjusted between 512 Symbols/s and 4096 Symbols/s. The symbol sate

defines the duration of one bit via the 32.768 kHz clock in order to recover the data.

The resonance frequency of all three channels of the antenna can be measured. This helps in

finding the correct capacitance to bring the LC circuit in resonance.

Note

It is important to reset this field to none in order to continue with other settings.

The internal capacitor bank can be changed on each channel between 0pF and 32pF in order to

tune the antenna to the desired resonance frequency. The AS3933 Demoboard provides a switch to

tune the antenna automatically to 125 kHz. The internal capacitor bank is changed until the

resonance frequency of 125 kHz is achieved. After this procedure the register map can be updated

manually via File/Readout Registers (Ctrl+R) in order to see the added capacitors at each channel.

It is possible to enable the Artificial Wakeup with a wake-up period between 1s and 2 hours.

The false wake-up register counts the number of frequency detections that do not match the wake-

up pattern. The actual number of false wake-ups can be deleted via the Clear False Wakeup button.

Reset the current RSSI measurement.

ams Demo Kit Manual, Confidential

Page 11

[v1-02] 2014-Jul-11

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