[pvrusb2] How can I get detailed info like SNR, AGC from pvrusb2 package at USB hauppauge tuner?

[Tina Ning]

Mike,

I saw for dvb tuner PCI card, it is possble to use DVB
frontend of Linux kernel to get SNR & AGC information.
Do you know if there is a way to get tuner status
information from pvrusb2 sysfs? I hope to know its
SNR, AGC value. I assume to get signal strength, I can
use ioctl VIDIOC_G_TUNER to get such info. But I don't
know how to get SNR, AGC info. 

Thanks