Hello,
I am trying to create a link between our product, using CC1101, to the evaluation board with a CC1125, in the 433MHz band, however, I encountered several problems:
1. Preamble setting: The CC1101 device uses four bytes with 0xAA, Using a similar setting on the CC1125 (4 preamble bytes containing 0xAA) does not work, using 2 preamble bytes, with 0x33 (00110011) works for some reason and generates packets with good CRC.
2. Sensitivity: The evaluation board I have is the 868MHz cat 1 (With SAW filter). I modified the passives to those of the 433MHz board, But the best sensitivity I managed to get is -56dBm. I test the board within an aluminum enclosure and 2 variable attenuators, trying to reduce outside noise.
How can I improve the evaluation board sensitivity?
The CC1101 settings are the default settings taken from the SmartRF studio.
The CC1125 settings are attached.