scan-s2
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scan-s2 is a command line frequency scanning utility very similar to scan. It is not included in LinuxTV dvb-apps but complements the two frequency scanning utilities available through LinuxTV dvb-apps, dvbscan and scan. Comparison of the scanning utilities.
When using scan-s2, one indirectly instructs it to search for programs streams that can be received from specified frequencies and generates a resultant channel list.
Note: scan-s2 requires Linux DVB driver API version 5.
Documentation
scan-s2 does not have a man page. However, if you run it with the -h parameter, the output provides a summary of its command options. For example, running scan -h produces:
usage: scan-s2 [options...] [-c | initial-tuning-data-file]
scan-s2 doesn't do frequency scans, hence it needs initial
tuning data for at least one transponder/channel.
-c scan on currently tuned transponder only
-v verbose (repeat for more)
-q quiet (repeat for less)
-a N use DVB /dev/dvb/adapterN/
-f N use DVB /dev/dvb/adapter?/frontendN
-d N use DVB /dev/dvb/adapter?/demuxN
-D id disable S1 mode or S2 mode
id = S1 disable S1 mode
id = S2 disable S2 mode
-s N use DiSEqC switch position N (DVB-S only)
-S N use DiSEqC uncommitted switch position N (DVB-S only)
-r sat move DiSEqC rotor to satellite location, e.g. '13.0E' or '1.0W'
-R N move DiSEqC rotor to position number N
-i N spectral inversion setting (0: off, 1: on, 2: auto [default])
-n evaluate NIT messages for full network scan (slow!)
-5 multiply all filter timeouts by factor 5
for non-DVB-compliant section repitition rates
-O pos Orbital position override 'S4W', 'S19.2E' - good for VDR output
-k cnt Skip count, will skip every first specified
messages for every message type (default 0)
-I cnt Scan iterations count (default 10).
Larger number will make scan longer on every channel
-o fmt output format: 'vdr' (default) or 'zap'
-x N Conditional Access, (default -1)
N=-2 gets all channels (FTA and encrypted),
output received CAID :CAID:
N=-1 gets all channels (FTA and encrypted),
output CA is set to :0:
N=0 gets only FTA channels
N=xxx sets ca field in vdr output to :xxx:
-t N Service select, Combined bitfield parameter.
1 = TV, 2 = Radio, 4 = Other, (default 7)
-p for vdr output format: dump provider name
-e N VDR version, default 2 for VDR-1.2.x
ANYTHING ELSE GIVES NONZERO NIT and TID
Vdr version 1.3.x and up implies -p.
-l lnb-type (DVB-S Only) (use -l help to print types) or
-l low[,high[,switch]] in Mhz
-u UK DVB-T Freeview channel numbering for VDR
-P do not use ATSC PSIP tables for scanning
(but only PAT and PMT) (applies for ATSC only)
-A N check for ATSC 1=Terrestrial [default], 2=Cable or 3=both
-U Uniquely name unknown services
-D s Disable specified scan mode (by default all modes are enabled)
s=S1 Disable DVB-S scan
s=S2 Disable DVB-S2 scan (good for owners of cards that do not
support DVB-S2 systems)
-X Disable AUTOs for initial transponders (esp. for hardware which
not support it). Instead try each value of any free parameters.
Initial-tuning-data format
DVB-S/DVB-S2
- S S1/S2
- S1 DVB-S mode only
- S2 DVB-S2 mode only
S <frequency> <polarity> <symbol rate> [fec] [rolloff] [modulation] S1 <frequency> <polarity> <symbol rate> [fec] [rolloff] [modulation] S2 <frequency> <polarity> <symbol rate> [fec] [rolloff] [modulation]
DVB-C
C <frequency> <symbol rate> [fec] [modulation]
DVB-T
T <frequency> [bandwidth] [HP fec] [LP fec] [modulation] [transmission mode] [guard] [hierarchy]
ATSC
A <frequency> [modulation]