Hello,
I am a Master’s student doing an internship on physical-layer modelling of G3-PLC using the ST8500 (ST G3-PLC hybrid solution, AN5603).
I have two technical questions that I could not resolve from the public documentation:
PGA / AGC on ST8500
The datasheet states that the PGA gain ranges from –18 dB to +54 dB with a 3 dB step, but I cannot find the exact mapping between the internal PGA code and the gain in dB.
For the ST7580, there is a “PGA gain table” (code 0…8 → gain in dB).
Could you provide the equivalent information for the ST8500 (table code → gain or a formula and code range) so that I can interpret the AGC value correctly?
AGC attribute in CENELEC profiles
In AN5603, the attributes PHY_LASTRECEIVEDPACKETAGC / PHY_PHYCURRENTAGC are marked as “only FCC”.
Is there an equivalent AGC attribute for CENELEC profiles, or another recommended quantity (e.g. based on SNR/LQI) to characterise the receive level/quality in CENELEC?
These details are important for linking my experimental measurements (AGC/SNR/LQI) with my PHY channel models.
Thank you in advance for your help.
