hi there,

I'm noodling around with being able to remotely monitor signal quality on my S3.

the output of 'cat /proc/ati' looks like:

Code:
Network Interface Module (NIM) 0
==================================================
Demod type:        T314
Demod I2C address: 0x14
Tuner type:        Samsung (TDA6651)

FAT (Inband) Tuner
   Signal Lock:         Yes
   Tuned Frequency:     831000000Hz (Center-band)
   Modulation:          256QAM
   RF Source:           Cable
   SNR (SQI):           35dB (0x47 0xf5)
   RS Uncorrectable:    0
   RS Correctable:      0

FDC (Out-of-band) Tuner
   Signal Lock:         Yes
   Frequency:           75250000Hz
   Modulation:          QPSK
   Symbol Rate:         1024
   Inversion:           OFF
   SNR factor:          8257521
   RS Uncorrectable:    0
   RS Correctable:      0

Network Interface Module (NIM) 1
==================================================
Demod type:        T314
Demod I2C address: 0x18
Tuner type:        Samsung (TDA6651)

FAT (Inband) Tuner
   Signal Lock:         Yes
   Tuned Frequency:     765000000Hz (Center-band)
   Modulation:          256QAM
   RF Source:           Cable
   SNR (SQI):           36dB (0x48 0x62)
   RS Uncorrectable:    0
   RS Correctable:      0

FDC (Out-of-band) Tuner
   Signal Lock:         Yes
   Frequency:           75250000Hz
   Modulation:          QPSK
   Symbol Rate:         1024
   Inversion:           OFF
   SNR factor:          7383941
   RS Uncorrectable:    0
   RS Correctable:      0

FAT 0: LOCK=1 HZ=831000000 MOD=256QAM SRC=0 SNR=36 UE=0 CE=0
FDC 0: LOCK=1 HZ=75250000 MOD=QPSK RATE=1024 INV=0
FAT 1: LOCK=1 HZ=765000000 MOD=256QAM SRC=0 SNR=36 UE=0 CE=0
FDC 1: LOCK=1 HZ=75250000 MOD=QPSK RATE=1024 INV=0
the "SQI" measurements are sorta interesting. If you look at those values over a short period of time you get (for the first tuner, here):

Code:
   SNR (SQI):           36dB (0x48 0x96)
   SNR (SQI):           36dB (0x48 0x71)
   SNR (SQI):           36dB (0x48 0x60)
   SNR (SQI):           36dB (0x48 0xac)
   SNR (SQI):           36dB (0x48 0x5)
   SNR (SQI):           36dB (0x48 0xf9)
   SNR (SQI):           36dB (0x48 0x34)
   SNR (SQI):           36dB (0x48 0xd3)
   SNR (SQI):           36dB (0x49 0x2f)
   SNR (SQI):           36dB (0x48 0x8e)
   SNR (SQI):           36dB (0x49 0xc)
   SNR (SQI):           36dB (0x49 0x1c)
   SNR (SQI):           36dB (0x48 0xe4)
   SNR (SQI):           36dB (0x48 0xb1)
   SNR (SQI):           36dB (0x49 0x32)
   SNR (SQI):           36dB (0x49 0x32)
   SNR (SQI):           36dB (0x49 0x7d)
   SNR (SQI):           36dB (0x49 0x46)
   SNR (SQI):           36dB (0x48 0xd2)
   SNR (SQI):           36dB (0x49 0x6f)
   SNR (SQI):           36dB (0x49 0x13)
   SNR (SQI):           36dB (0x49 0x27)
   SNR (SQI):           36dB (0x49 0x2f)
   SNR (SQI):           36dB (0x49 0x4a)
   SNR (SQI):           36dB (0x49 0x96)
   SNR (SQI):           36dB (0x49 0x80)
   SNR (SQI):           36dB (0x49 0x94)
   SNR (SQI):           36dB (0x49 0x4d)
   SNR (SQI):           36dB (0x48 0xf1)
   SNR (SQI):           36dB (0x49 0x4e)
   SNR (SQI):           36dB (0x49 0x84)
   SNR (SQI):           36dB (0x48 0x9a)
   SNR (SQI):           36dB (0x49 0xf)
   SNR (SQI):           36dB (0x49 0x78)
   SNR (SQI):           36dB (0x48 0x9a)
   SNR (SQI):           36dB (0x48 0xdc)
   SNR (SQI):           36dB (0x48 0xef)
   SNR (SQI):           36dB (0x49 0x4d)
   SNR (SQI):           36dB (0x48 0xe4)
   SNR (SQI):           36dB (0x48 0xe8)
   SNR (SQI):           36dB (0x48 0x6a)
   SNR (SQI):           36dB (0x48 0x4c)
   SNR (SQI):           36dB (0x48 0xf4)
   SNR (SQI):           36dB (0x49 0x12)
   SNR (SQI):           36dB (0x48 0xd1)
   SNR (SQI):           36dB (0x48 0xae)
   SNR (SQI):           36dB (0x48 0xda)
   SNR (SQI):           36dB (0x48 0x6c)
   SNR (SQI):           36dB (0x48 0x2a)
   SNR (SQI):           36dB (0x48 0x8a)
   SNR (SQI):           36dB (0x48 0xca)
   SNR (SQI):           35dB (0x48 0x6a)
   SNR (SQI):           36dB (0x47 0xe7)
   SNR (SQI):           36dB (0x48 0x54)
   SNR (SQI):           36dB (0x48 0xc7)
   SNR (SQI):           36dB (0x48 0x78)
   SNR (SQI):           36dB (0x48 0x3a)
   SNR (SQI):           36dB (0x48 0x42)
   SNR (SQI):           35dB (0x47 0xf3)
   SNR (SQI):           36dB (0x47 0xee)
   SNR (SQI):           36dB (0x48 0x26)
   SNR (SQI):           36dB (0x48 0x7c)
   SNR (SQI):           36dB (0x48 0x30)
   SNR (SQI):           35dB (0x48 0x19)
   SNR (SQI):           36dB (0x47 0xdf)
   SNR (SQI):           36dB (0x47 0xc8)
   SNR (SQI):           36dB (0x48 0x18)
   SNR (SQI):           36dB (0x48 0x1f)
   SNR (SQI):           36dB (0x47 0xee)
   SNR (SQI):           36dB (0x48 0x96)
   SNR (SQI):           36dB (0x48 0x63)
   SNR (SQI):           36dB (0x48 0xb8)
   SNR (SQI):           35dB (0x47 0xf8)
   SNR (SQI):           35dB (0x47 0xbb)
   SNR (SQI):           36dB (0x48 0x31)
   SNR (SQI):           36dB (0x47 0xf7)
   SNR (SQI):           36dB (0x48 0xb6)
   SNR (SQI):           36dB (0x48 0x54)
   SNR (SQI):           36dB (0x48 0x88)
   SNR (SQI):           36dB (0x48 0x7)
   SNR (SQI):           36dB (0x48 0x7e)
   SNR (SQI):           36dB (0x49 0x11)
   SNR (SQI):           36dB (0x48 0x7b)
   SNR (SQI):           36dB (0x48 0xd3)
   SNR (SQI):           36dB (0x48 0xec)
   SNR (SQI):           36dB (0x48 0xdd)
   SNR (SQI):           36dB (0x48 0xa7)
   SNR (SQI):           36dB (0x49 0x20)
   SNR (SQI):           36dB (0x48 0xbb)
   SNR (SQI):           36dB (0x49 0x5d)
   SNR (SQI):           36dB (0x48 0xf0)
   SNR (SQI):           36dB (0x49 0x15)
   SNR (SQI):           36dB (0x49 0x2a)
   SNR (SQI):           36dB (0x49 0x15)
   SNR (SQI):           36dB (0x49 0x9b)
   SNR (SQI):           36dB (0x48 0xa8)
   SNR (SQI):           36dB (0x49 0xf)
   SNR (SQI):           36dB (0x49 0x69)
   SNR (SQI):           36dB (0x49 0x8d)
   SNR (SQI):           36dB (0x48 0xe2)
Does anyone have any ideas what the hex digits refer to? I'm curious as to why that 2nd byte is changing so much.