[SOLVED] w_scan (20170107-2.1) DVB-T2

Marc Ominus

I have just try scanning (blind scan) for new multiplexes in our communal aerial and satellite system,

and trying w_scan, but no T2 multiplexes appear in my scan for T/T2....:

sudo service tvheadend stop

w_scan -x -c GB w_scan version 20170107 (compiled for DVB API 5.10) using settings for UNITED KINGDOM DVB aerial DVB-T GB scan type TERRESTRIAL, channellist 6 output format initial tuning data 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 CXD2880": very good :-)) Using TERRESTRIAL frontend (adapter /dev/dvb/adapter0/frontend0) -_-_-_-_ Getting frontend capabilities-_-_-_-_ Using DVB API 5.11 frontend 'Sony CXD2880' supports DVB-T2 INVERSION_AUTO QAM_AUTO TRANSMISSION_MODE_AUTO GUARD_INTERVAL_AUTO HIERARCHY_AUTO not supported, trying HIERARCHY_NONE. FEC_AUTO BANDWIDTH_AUTO not supported, trying 6/7/8 MHz. FREQ (174.00MHz ... 862.00MHz) -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_ T 482000000 8MHz 3/4 NONE QAM64 8k 1/32 NONE # London T 626000000 8MHz 3/4 NONE QAM64 8k 1/32 NONE # Berks & North Hants T 586000000 8MHz 3/4 NONE QPSK 8k 1/32 NONE # London T 714000000 8MHz 3/4 NONE QPSK 8k 1/32 NONE T2 0 AUTO AUTO NONE AUTO AUTO AUTO NONE T 490000000 8MHz 2/3 NONE QAM64 8k 1/32 NONE # London T 506000000 8MHz 3/4 NONE QAM64 8k 1/32 NONE # London T 514000000 8MHz 2/3 NONE QAM64 8k 1/32 NONE # London T 562000000 8MHz 3/4 NONE QPSK 8k 1/32 NONE # Berks & North Hants T 578000000 8MHz 3/4 NONE QPSK 8k 1/32 NONE # Berks & North Hants T2 0 AUTO AUTO NONE AUTO AUTO AUTO NONE T 530000000 8MHz 3/4 NONE QAM64 8k 1/32 NONE # London T 642000000 8MHz 2/3 NONE QAM64 8k 1/32 NONE # Berks & North Hants T 650000000 8MHz 3/4 NONE QAM64 8k 1/32 NONE # Berks & North Hants T 674000000 8MHz 3/4 NONE QAM64 8k 1/32 NONE # Berks & North Hants T 642000000 8MHz 2/3 NONE QAM64 8k 1/32 NONE

While if I manually try to tune to one that is known with dvblast it works:


dvblast -f 746000000 -b 8 -a 0 -n 0 -5 DVBT2

DVBlast 3.4 (release)
warning: restarting
debug: compiled with DVB API version 5.11
debug: using DVB API version 5.11
debug: Frontend "Sony CXD2880" supports:
debug:  frequency min: 174000000, max: 862000000, stepsize: 1000, tolerance: 0
debug:  symbolrate min: 0, max: 0, tolerance: 0
debug:  capabilities:
debug:   INVERSION_AUTO
debug:   FEC_1_2
debug:   FEC_2_3
debug:   FEC_3_4
debug:   FEC_4_5
debug:   FEC_5_6
debug:   FEC_7_8
debug:   FEC_AUTO
debug:   QPSK
debug:   QAM_16
debug:   QAM_32
debug:   QAM_64
debug:   QAM_128
debug:   QAM_256
debug:   QAM_AUTO
debug:   TRANSMISSION_MODE_AUTO
debug:   GUARD_INTERVAL_AUTO
debug:   2G_MODULATION
debug:   FE_CAN_RECOVER
debug:   FE_CAN_MUTE_TS
debug:  delivery systems:
debug:   DVBT
debug:   DVBT2
debug: tuning DVB-T2 frontend to f=746000000 bandwidth=8 inversion=-1 fec_hp=999 fec_lp=999 hierarchy=-1 modulation=qam_auto guard=-1 transmission=-1 PLP_ID=0 
warning: failed opening CAM device /dev/dvb/adapter0/ca0 (No such file or directory)
debug: setting filter on PID 0
debug: setting filter on PID 16
debug: setting filter on PID 17
debug: setting filter on PID 18
debug: setting filter on PID 19
debug: setting filter on PID 20
error: no config file
debug: frontend has acquired stable FEC
debug: frontend has acquired sync
info: frontend has acquired lock
debug: - Bit error rate: 0
debug: - Signal strength: 38774
debug: new PAT tsid=40960 version=4
debug:   * NIT pid=16
debug:   * program number=40960 pid=1001
debug:   * program number=40976 pid=1002
debug:   * program number=40992 pid=1003
debug:   * program number=41040 pid=1006
debug:   * program number=41056 pid=1008
debug:   * program number=41064 pid=1009
debug:   * program number=41184 pid=1010
debug:   * program number=41200 pid=1019
debug:   * program number=41216 pid=1011
debug:   * program number=41248 pid=1015
debug:   * program number=41280 pid=1017
debug:   * program number=41296 pid=1022
debug:   * program number=41392 pid=1013
debug:   * program number=41424 pid=1030
debug: end PAT
debug: frontend has acquired signal
debug: frontend has acquired carrier
debug: new SDT actual tsid=40960 version=31 onid=9018
debug:   * service sid=40960 eit_schedule eit_pf running=4
debug:     - desc 48 service type=0x19 provider="" service="BBC NEWS HD"
debug:     - desc 73 unknown length=12 value=66702e6262632e636f2e756b
debug:     - desc 5f private_data specifier=0x0000233a
debug:     - desc 7e unknown length=1 value=f7
debug:   * service sid=40976 eit_schedule eit_pf running=4
debug:     - desc 48 service type=0x19 provider="" service="BBC FOUR HD"
debug:     - desc 73 unknown length=12 value=66702e6262632e636f2e756b
debug:     - desc 5f private_data specifier=0x0000233a
debug:     - desc 7e unknown length=1 value=f7
debug:   * service sid=40992 eit_schedule eit_pf running=4
debug:     - desc 48 service type=0x19 provider="" service="CBeebies HD"
debug:     - desc 73 unknown length=12 value=66702e6262632e636f2e756b
debug:     - desc 5f private_data specifier=0x0000233a
debug:     - desc 7e unknown length=1 value=f7
debug:   * service sid=41040 eit_schedule eit_pf running=4
debug:     - desc 48 service type=0x19 provider="" service="QUEST HD"
debug:     - desc 73 unknown length=17 value=7777772e717565737474762e636f2e756b
debug:     - desc 5f private_data specifier=0x0000233a
debug:     - desc 7e unknown length=1 value=f7
debug:   * service sid=41056 eit_schedule eit_pf running=4
debug:     - desc 48 service type=0x19 provider="" service="QVC HD"
debug:     - desc 73 unknown length=13 value=7777772e717663756b2e636f6d
debug:     - desc 5f private_data specifier=0x0000233a
debug:     - desc 7e unknown length=1 value=f7
debug:   * service sid=41064 eit_schedule eit_pf running=4
debug:     - desc 48 service type=0x19 provider="" service="QVC Beauty HD"
debug:     - desc 73 unknown length=13 value=7777772e717663756b2e636f6d
debug:     - desc 5f private_data specifier=0x0000233a
debug:     - desc 7e unknown length=1 value=f7
debug:   * service sid=41184 eit_schedule eit_pf running=4
debug:     - desc 48 service type=0x16 provider="" service="FreeSports"
debug:     - desc 73 unknown length=21 value=7777772e7072656d69657273706f7274732e636f6d
debug:   * service sid=41200 eit_schedule eit_pf running=4
debug:     - desc 48 service type=0x16 provider="" service="More4+1"
debug:     - desc 73 unknown length=16 value=7777772e6368616e6e656c342e636f6d
debug:   * service sid=41216 eit_schedule eit_pf running=4
debug:     - desc 48 service type=0x16 provider="" service="NOW XMAS"
debug:     - desc 73 unknown length=8 value=616174772e636f6d
debug:   * service sid=41248 eit_schedule eit_pf running=4
debug:     - desc 48 service type=0x16 provider="" service="PBS America +1"
debug:     - desc 73 unknown length=20 value=7777772e706273616d65726963612e636f2e756b
debug:   * service sid=41280 eit_schedule eit_pf running=4
debug:     - desc 48 service type=0x16 provider="" service="Forces TV"
debug:     - desc 73 unknown length=14 value=7777772e666f726365732e6e6574
debug:   * service sid=41296 eit_schedule eit_pf running=4
debug:     - desc 48 service type=0x19 provider="" service="RT HD"
debug:     - desc 73 unknown length=10 value=7777772e72742e636f6d
debug:     - desc 5f private_data specifier=0x0000233a
debug:     - desc 7e unknown length=1 value=f1
debug:   * service sid=41392 eit_schedule eit_pf running=4
debug:     - desc 48 service type=0x16 provider="" service="That's TV Xmas UK"
debug:     - desc 73 unknown length=11 value=746861747374762e636f6d
debug:   * service sid=41424 eit_schedule eit_pf running=4
debug:     - desc 48 service type=0x16 provider="" service="Quest Red+1"
debug:     - desc 73 unknown length=17 value=7777772e717565737474762e636f2e756b
debug: end SDT

Anyone any advise?

Saen Acro

Force frontend as DVB-T2

try also

#TSDUCK
tsscan -v -l --show-modulation
#SCAN
scan -o pids -a 2 initscan.conf
@w-scan2
w_scan2 -f -c x > initial

Marc Ominus

saen acro wrote:
> Force frontend as DVB-T2
>
> try also
>
> #TSDUCK
> tsscan -v -l --show-modulation
> #SCAN
> scan -o pids -a 2 initscan.conf
> @w-scan2

> w_scan2 -f -c x > initial

Forcing DVB-T2 on w_scan (20170107-2.1), how would that be done?

w_scan --help nor w_scan -H give any clues :(

Thank you for the w_scan2, works great :) Here is howto for benefit of others:

https://github.com/stefantalpalaru/w_scan2

git clone https://github.com/stefantalpalaru/w_scan2.git cd w_scan2 ./configure sudo lscpu | grep -E '^CPU\(' make -j 4 ./w_scan2 --help ./w_scan2 -H

Here is the output: (the first 4 empty T2 muxes indicate upcoming change, or is it just glitch?

#------------------------------------------------------------------------------ # file automatically generated by w_scan2 # (https://github.com/stefantalpalaru/w_scan2) #! <w_scan> 1.0.14 1 0 TERRESTRIAL GB </w_scan> #------------------------------------------------------------------------------ # location and provider: <add description here> # date (yyyy-mm-dd) : 2021-11-25 # provided by (opt) : <your name or email here> # # T[2] <freq> <bw> <fec_hi> <fec_lo> <mod> <tm> <guard> <hi> [plp_id] [# comment] #------------------------------------------------------------------------------ T2 0 AUTO AUTO NONE AUTO AUTO AUTO NONE T2 0 AUTO AUTO NONE AUTO AUTO AUTO NONE T2 0 AUTO AUTO NONE AUTO AUTO AUTO NONE T2 0 AUTO AUTO NONE AUTO AUTO AUTO NONE T 482000000 8MHz AUTO AUTO AUTO AUTO AUTO NONE # London T 490000000 8MHz AUTO AUTO AUTO AUTO AUTO NONE # London T 506000000 8MHz AUTO AUTO AUTO AUTO AUTO NONE # London T 514000000 8MHz AUTO AUTO AUTO AUTO AUTO NONE # London T 522000000 8MHz AUTO AUTO AUTO AUTO AUTO NONE # Berks & North Hants T 529833000 8MHz 3/4 NONE QAM64 8k 1/32 NONE # London T2 546000000 8MHz AUTO AUTO AUTO AUTO AUTO NONE # London T 562000000 8MHz AUTO AUTO AUTO AUTO AUTO NONE # Berks & North Hants T 578000000 8MHz 3/4 NONE QPSK 8k 1/32 NONE # Berks & North Hants T 586000000 8MHz 3/4 NONE QPSK 8k 1/32 NONE # London T2 618000000 8MHz AUTO AUTO AUTO AUTO AUTO NONE # Berks & North Hants T 626000000 8MHz AUTO AUTO AUTO AUTO AUTO NONE # Berks & North Hants T 642000000 8MHz AUTO AUTO AUTO AUTO AUTO NONE # Berks & North Hants T 650000000 8MHz AUTO AUTO AUTO AUTO AUTO NONE # Berks & North Hants T 666000000 8MHz AUTO AUTO AUTO AUTO AUTO NONE # Berks & North Hants T 674000000 8MHz AUTO AUTO AUTO AUTO AUTO NONE # Berks & North Hants T2 746000000 8MHz AUTO AUTO AUTO AUTO AUTO NONE # Com7 National

I have found another version of w_scan, yet to test ....w_scan_cpp

https://www.gen2vdr.de/wirbel/w_scan_cpp/index2.html

TSDuck/tsscan working great, another tool for blind scan, thank you. :(
default command did not find the T2 muxes again:

tsscan --adapter 0 --bandwidth 8000000 -u -l --show-modulation --verbose

but the one below did :)

tsscan --adapter 0 --bandwidth 8000000 -u -l --show-modulation --delivery-system DVB-T2 --verbose

I could not get "scan" working for blindscan :( - needs initial tuning data for at least one transponder/channel

Saen Acro

No of this use blindscan
they use NIT table from muxes

or fixed 8 mhz step based on regional settings.

https://github.com/deeptho/blindscan as you can see work on specific chip's