dvb-fe-tool(1) User Commands dvb-fe-tool(1)NAMEdvb-fe-tool - DVBv5 tool for frontend settings inspect/change
SYNOPSISdvb-fe-tool [OPTION]...
DESCRIPTION
dvbv5-fe-tool is a command line tool for digital TV services that is
compliant with version 5 of the DVB API, and backward compatible with
the older v3 DVB API.
dvb-fe-tool is a tool to inspect and change the tuning parameters
directly at the Digital TV frontend. If called without any parameter,
it will show the device capabilities.
OPTIONS
The following options are valid:
-3, --dvbv3
Use DVBv3 only
-a, --adapter=ADAPTER
Digital TV adapter to use. Default: 0.
-A, --acoustical
bips if signal quality is good. Also enables femon mode. Please
notice that console bip should be enabled on your wm.
-d, --set-delsys=PARAMS
Sets delivery system to the one specified at PARAMS. use help to
show all supported delivery systems.
-f, --frontend=FRONTEND
Digital TV frontend to use. Default: 0.
-g, --get
Gets frontend parameters.
-m, --femon
Monitors the frontend locking status and the available statis‐
tics for a frontend that it is already being streaming via some
other application. This opens the frontend on read-only mode.
-v, --verbose
Enables debug messages.
-?, --help
Outputs the usage help.
--usage
Gives a short usage message.
-V, --version
Prints program version.
EXIT STATUS
On success, it returns 0.
EXAMPLES
Showing device capabilities
This is the default behavior. It will open the frontend and show what
capabilities it supports and what's the version of the DVB API.
$ dvb-fe-tool
Device DRXK DVB-C DVB-T (/dev/dvb/adapter0/frontend0) capabilities:
CAN_FEC_1_2
CAN_FEC_2_3
CAN_FEC_3_4
CAN_FEC_5_6
CAN_FEC_7_8
CAN_FEC_AUTO
CAN_GUARD_INTERVAL_AUTO
CAN_HIERARCHY_AUTO
CAN_INVERSION_AUTO
CAN_MUTE_TS
CAN_QAM_16
CAN_QAM_32
CAN_QAM_64
CAN_QAM_128
CAN_QAM_256
CAN_RECOVER
CAN_TRANSMISSION_MODE_AUTO
DVB API Version 5.10, Current v5 delivery system: DVBC/ANNEX_A
Supported delivery systems:
[DVBC/ANNEX_A]
DVBC/ANNEX_C
DVBT
Setting the delivery system
Some devices (like the above example) supports multiple delivery sys‐
tems. Older DVB applications might not be able to switch from one
delivery system to another one, as this feature were added only on DVB
API version 5.5.
This feature allows one to use those legacy applications.
$ dvb-fe-tool-d dvbc/annex_c
Changing delivery system to: DVBC/ANNEX_C
Getting the current frontend settings
The tool can also be used to get the current settings. In this case, it
will open the frontend at read-only mode, allowing it to be called
while some other digital TV application is running.
$ dvb-fe-tool-g
FREQUENCY = 573000000
MODULATION = QAM/256
INVERSION = AUTO
SYMBOL_RATE = 5217000
INNER_FEC = NONE
DELIVERY_SYSTEM = DVBC/ANNEX_A
Monitoring the frontend
The dvb-fe-tool can also be used to monitor a DVB frontend statistics
without touching on the device, using the --femon (or -m) parameter.
The typical usage is to be able to read the statistics while some other
DVB program or application is in use.
On this mode, it will keep printing the frontend statistics on every
second, until the program is aborted with CTRL-C:
For example, while dvbv5-zap is tuning some channel, it will produce:
$ dvb-fe-tool--femon
Lock (0x1f) Quality= Good Signal= 100.00% C/N= 36.40dB UCB= 370 postBER= 28.0x10^-6 PER= 0
Lock (0x1f) Quality= Good Signal= 100.00% C/N= 36.80dB UCB= 370 postBER= 25.3x10^-6 PER= 0
Lock (0x1f) Quality= Good Signal= 100.00% C/N= 36.30dB UCB= 370 postBER= 25.7x10^-6 PER= 0
Lock (0x1f) Quality= Good Signal= 100.00% C/N= 36.30dB UCB= 370 postBER= 28.4x10^-6 PER= 0
Lock (0x1f) Quality= Good Signal= 100.00% C/N= 36.50dB UCB= 370 postBER= 26.5x10^-6 PER= 0
Lock (0x1f) Quality= Good Signal= 100.00% C/N= 36.50dB UCB= 370 postBER= 26.9x10^-6 PER= 0
Lock (0x1f) Quality= Good Signal= 100.00% C/N= 36.20dB UCB= 370 postBER= 28.6x10^-6 PER= 0
Lock (0x1f) Quality= Good Signal= 100.00% C/N= 36.70dB UCB= 370 postBER= 26.7x10^-6 PER= 0
Lock (0x1f) Quality= Good Signal= 100.00% C/N= 36.80dB UCB= 370 postBER= 23.3x10^-6 PER= 0
Lock (0x1f) Quality= Good Signal= 100.00% C/N= 36.50dB UCB= 370 postBER= 26.7x10^-6 PER= 0
If the standard error device is the console, the messages will be col‐
ored according with the signal quality.
The presented statistics types and unities will depend on the ones that
the hardware you're using support. So, it may vary from hardware to
hardware.
On this mode, it also supports to output an audible signal if the qual‐
ity is good, using the '-A' parameter.
Please notice that, on modern Linux systems, the system audio should be
enabled at your window manager and the audio theme should be set to
produce an audio when BELL (character) is sent to the terminal.
NOTE:
C/N on the above stats means Carrier to Noise ratio. This is the Signal
to Noise ratio measured at the pilot carrier or just the Signal to
Noise ratio for modulation types where just one carrier is used, like
DVB-C or DVB-S.
BUGS
Report bugs to Linux Media Mailing List <linux-media@vger.kernel.org>
COPYRIGHT
Copyright (c) 2011-2014 by Mauro Carvalho Chehab.
License GPLv2: GNU GPL version 2 <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
DVBv5 Utils 1.6.3 Fri Oct 3 2014 dvb-fe-tool(1)
