root@pvr2:~# w_scan -c GB > channels.conf
w_scan version 20130331 (compiled for DVB API 5.10)
using settings for UNITED KINGDOM
DVB aerial
DVB-T GB
scan type TERRESTRIAL, channellist 6
output format vdr-2.0
WARNING: could not guess your codepage. Falling back to 'UTF-8'
output charset 'UTF-8', use -C <charset> to override
Info: using DVB adapter auto detection.
        /dev/dvb/adapter0/frontend0 -> TERRESTRIAL "Sony CXD2820R": very good :-))

Using TERRESTRIAL frontend (adapter /dev/dvb/adapter0/frontend0)
-_-_-_-_ Getting frontend capabilities-_-_-_-_
Using DVB API 5.a
frontend 'Sony CXD2820R' supports
DVB-T2
INVERSION_AUTO
QAM_AUTO
TRANSMISSION_MODE_AUTO
GUARD_INTERVAL_AUTO
HIERARCHY_AUTO
FEC_AUTO
FREQ (45.00MHz ... 864.00MHz)
-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_
Scanning 7MHz frequencies...
177500: (time: 00:00)
184500: (time: 00:06)
191500: (time: 00:13)
198500: (time: 00:20)
205500: (time: 00:27)
212500: (time: 00:33)
219500: (time: 00:40)
226500: (time: 00:46)
Scanning 8MHz frequencies...
474000: (time: 00:53)
474167: (time: 01:02)
473833: (time: 01:10)
482000: (time: 01:16) (time: 01:20) signal ok:
        QAM_AUTO f = 482000 kHz I999B8C999D999T999G999Y999
        ===================== parse_network_change_notify_descriptor ===========
        len = 20
        0x00: 07 0B C1 10 01 01 DD 9D 09 00 00 01 00 00 13 00 :
        0x10: 10 44 23 3A                                     :  D#:
        ========================================================================
        new transponder:
           (QAM_64   f = 490000 kHz I999B8C23D0T8G32Y0) 0x405A
        new transponder:
           (QAM_64   f = 514000 kHz I999B8C23D0T8G32Y0) 0x405A
        updating transponder:
           (QAM_AUTO f = 482000 kHz I999B8C999D999T999G999Y999) 0x0000
        to (QAM_AUTO f = 482000 kHz I999B8C999D999T999G999Y999P0) 0x4004
        new transponder:
           (QAM_64   f = 506000 kHz I999B8C34D0T8G32Y0) 0x405A
        updating transponder:
           (QAM_AUTO f = 482000 kHz I999B8C999D999T999G999Y999P0) 0x4004
        to (QAM_64   f = 482000 kHz I999B8C34D0T8G32Y0) 0x405A
        new transponder:
           (QAM_64   f = 529833 kHz I999B8C34D0T8G32Y0) 0x405A
        updating transponder:
           (QAM_64   f = 482000 kHz I999B8C34D0T8G32Y0) 0x405A
        to (QAM_AUTO f = 482000 kHz I999B8C999D999T999G999Y999P0) 0x4004
        new transponder:
           (QPSK     f = 537833 kHz I999B8C34D0T8G32Y0) 0x405A
482167: skipped (already known transponder)
481833: skipped (already known transponder)
490000: skipped (already known transponder)
490167: skipped (already known transponder)
489833: skipped (already known transponder)
498000: (time: 01:33)
498167: (time: 01:40)
497833: (time: 01:47)
506000: skipped (already known transponder)
506167: skipped (already known transponder)
505833: skipped (already known transponder)
514000: skipped (already known transponder)
514167: skipped (already known transponder)
513833: skipped (already known transponder)
522000: (time: 01:53)
522167: (time: 02:00)
521833: (time: 02:06)
530000: skipped (already known transponder)
530167: skipped (already known transponder)
529833: skipped (already known transponder)
538000: skipped (already known transponder)
538167: skipped (already known transponder)
537833: skipped (already known transponder)
546000: (time: 02:14) (time: 02:17) signal ok:
        QAM_AUTO f = 546000 kHz I999B8C999D999T999G999Y999
Info: no data from NIT(actual)
546167: (time: 02:34) (time: 02:36) signal ok:
        QAM_AUTO f = 546167 kHz I999B8C999D999T999G999Y999
WARNING: received garbage data: crc = 0x95bac0ac; expected crc = 0x53104503
increasing filter timeout.
WARNING: received garbage data: crc = 0x34b00e90; expected crc = 0x843db91b
WARNING: received garbage data: crc = 0xc0fb48c7; expected crc = 0x525220fc
WARNING: received garbage data: crc = 0xaebbbea2; expected crc = 0x6f207570
WARNING: received garbage data: crc = 0x90e46d45; expected crc = 0x525f20fc
Info: no data from NIT(actual)
545833: (time: 03:41) (time: 03:44) signal ok:
        QAM_AUTO f = 545833 kHz I999B8C999D999T999G999Y999
Info: no data from NIT(actual)
554000: (time: 04:01)
554167: (time: 04:07)
553833: (time: 04:14)
562000: (time: 04:20)