Further to the previous posts, I have been looking further into the handling by OpenVix (and perhaps others - I have not investigated) and ccs has logged the data returned by the driver. Two points have emerged:

(1) What OpenVix Frequency Finder and OpenWebIf respectively display as "AGC" & "acg" are the signal strength reported by the driver interpreted as a percentage.


(2) With a moderate signal level (SNR ~ 33dB according to other tuners, which is consistent with distance from the transmitter etc), the SundTek driver consistently returns a value of 65535 (i.e. 0xFFFF) for the following parameters:

(a) DTV_STAT_CNR - FE_SCALE_RELATIVE (new API)
(b) snrValue (old API)
(c) DTV_STAT_SIGNAL_STRENGTH (new API)

and never supplied data for DTV_STAT_CNR - FE_SCALE_DECIBEL via the new API.

Hope this helps identify what is going wrong.

EMJB