scan-s2 is a command line frequency scanning utility very similar to scan. 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.
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.
- 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]
C <frequency> <symbol rate> [fec] [modulation]
T <frequency> [bandwidth] [HP fec] [LP fec] [modulation] [transmission mode] [guard] [hierarchy]
A <frequency> [modulation]