6.1.2.2. FE_READ_SNR¶
6.1.2.2.2. Synopsis¶
-
int
ioctl(int fd, FE_READ_SNR, int16_t *snr)¶
6.1.2.2.3. Arguments¶
fd- File descriptor returned by
open(). snr- The signal-to-noise ratio is stored into *snr.
6.1.2.2.4. Description¶
This ioctl call returns the signal-to-noise ratio for the signal currently received by the front-end. For this command, read-only access to the device is sufficient.
6.1.2.2.5. Return Value¶
On success 0 is returned.
On error -1 is returned, and the errno variable is set
appropriately.
Generic error codes are described at the Generic Error Codes chapter.