Hello, i am finishing my diploma thesis but I have problem with Si 4713.
I connected to TXO output circuit as show schematic on picture here:
When I tested transmit mode I used default settings and set transmit frequency and power. In this command TX_TUNE_POWER I send data:
TX_TUNE_POWER, 0x00, 0x00, power, 0x00
The last value 0x00 is automatic tuning capacitor value. But when I read response via TX_TUNE_STATUS command, response of SI4713 is still 1. If the last argument have value 0x00 or other (1-191), the response of si is still 1. Can you help me?
I use analog inputs L and R with command POWER_UP and arguments 0x12, 0x50.
I tested my product with connected audio jack and output from pc. To TXO output SI4713 i connected filter and SMA connector with 75 cm long wire.
When i tuned on mobile phone transmit frequency and play music on PC, in mobile phone i heard still only noise
Where can be a problem? (in ANTCAP value?) or hardware TXO output? What do you think?
Thank you very much.