Difference between revisions of "DVB-S/S2/S2X"

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−
== DAB/DAB+ via Satellite ==
+
== DAB/DAB+ ==
  
−
https://github.com/piratfm/eti-tools
+
DAB/DAB+ channels can be found on satellite 7.0 east.
  
−
Satellite: 7.0E
 
 
<pre>
 
<pre>
−
/opt/bin/mediaclient -m DVBS2 -f 12572000 -S 10215000 -V V -E 3/4 -M QPSK
+
Frequency:12572 MHz
−
/opt/bin/mediaclient --cat /dev/dvb/adapter0/dvr0 | ./fedi2eti 101 239.16.242.17 60017 | dablin_gtk
+
Symbolrate: 10215000
 +
Modulation: DVB-S2/QPSK
 +
Polarization: Vertical
 +
</pre>
 +
 
 +
Locking on Transponder:
 +
 
 +
<pre>
 +
/opt/bin/mediaclient -m DVBS2 -f 12572000 -M QPSK -S 10215000 -V V -E 3/4
 +
</pre>
 +
 
 +
=== FileOutput ===
 +
 
 +
capturing and replaying the stream:
 +
 
 +
/opt/bin/mediaclient --cat /dev/dvb/adapter0/dvr0 | ../eti-tools/fedi2eti 101 239.16.242.17 60017 | ./odr-dabmod -C doc/example.ini > test.iq
 +
 
 +
hackrf_transfer -t test.iq -f 180064000  -x  47 -a 1 -s 2048000 -b 1750000
 +
 
 +
<pre>
 +
example.ini (parts of it):
 +
 
 +
[output]
 +
; choose output: possible values: uhd, file, zmq, soapysdr
 +
output=file
 +
[fileoutput]
 +
; Two output formats are supported: In the default mode,
 +
; the file output writes I/Q float values (i.e. complex
 +
; float) to the file. The I and Q samples can take values up
 +
; to 810000 in absolute magnitude with gainmode FIX. With
 +
; gainmode VAR and FIX, they should never exceed 50000.
 +
;format=complexf
 +
;
 +
; The complexf_normalised format applies a compensation factor to the complexf
 +
; output to bring the range of the I and Q components to [-1.0 .. 1.0]. The
 +
; digital_gain is still applied on top of that normalisation.
 +
;format=complexf_normalised
 +
;
 +
; When the format is set to s8, the output writes I/Q 8-bit
 +
; signed integers, where the magnitude is multiplied by 128/50000
 +
; effectively mapping the gainmode VAR range of -50000 -- 50000
 +
; to -128 -- 128. For other gainmodes, use the digital_gain setting
 +
; to make sure you don't create clipping.
 +
;
 +
; The format u8 is the same as s8, except that the values are mapped
 +
; between 0 and 255. Use u8 for welle.io, qt-dab or other tools.
 +
;
 +
; Also supported is s16, with system endianness (little endian on x86_64 and ARM)
 +
format=s8
 +
 
 +
; The output file:
 +
filename=/dev/stdout
 +
 
 +
show_metadata=0
 +
</pre>
 +
 
 +
=== Soapy Output ===
 +
 
 +
<pre>
 +
/opt/bin/mediaclient --cat /dev/dvb/adapter0/dvr0 | ../eti-tools/fedi2eti 101 239.16.242.17 60017 | ./odr-dabmod -C doc/example.ini
 +
</pre>
 +
 
 +
 
 +
<pre>
 +
[soapyoutput]
 +
; These options are given to the SoapySDR library:
 +
device=driver=hackrf
 +
;master_clock_rate=32768000
 +
txgain=47
 +
frequency=180064000
 +
</pre>
 +
 
 +
==== Soapy Config ====
 +
 
 +
Full Sample configuration:
 +
 
 +
<pre>
 +
; Sample configuration file for ODR-DabMod
 +
 
 +
[remotecontrol]
 +
; The RC feature is described in detail in doc/README-RC.md
 +
 
 +
; enable the telnet remote control on localhost:2121
 +
telnet=1
 +
telnetport=2121
 +
 
 +
; Enable zmq remote control.
 +
zmqctrl=1
 +
zmqctrlendpoint=tcp://127.0.0.1:9400
 +
; accepted formats according to man zmq_bind, i.e.
 +
; tcp://<interface>:<port>, e.g. tcp://lo:9400
 +
; and tcp://<ipaddress>:<port>
 +
 
 +
[log]
 +
; Write to a logfile or to syslog.
 +
; Setting filename to stderr is not necessary, as all messages are
 +
; automatically written to stderr.
 +
syslog=0
 +
filelog=0
 +
filename=odr-dabmod.log
 +
 
 +
[input]
 +
; A file or fifo input is using transport=file
 +
transport=file
 +
source=/dev/stdin
 +
 
 +
; When the end of file is reached, it is possible to rewind it
 +
loop=0
 +
 
 +
; ETI-over-TCP example:
 +
;transport=tcp
 +
;source=localhost:9200
 +
 
 +
; When recieving data using ZeroMQ, the source is the URI to be used
 +
;transport=zeromq
 +
;source=tcp://localhost:9100
 +
; The option max_frames_queued defines the maximum number of ETI frames
 +
; (frame duration: 24ms) that can be in the input queue
 +
;max_frames_queued=100
 +
 
 +
; EDI input.
 +
; Listen for EDI data on a given UDP port, unicast or multicast.
 +
;transport=edi
 +
;
 +
; EDI over TCP:
 +
;
 +
; Connect to TCP server on a given host
 +
;source=tcp://localhost:9201
 +
;
 +
; EDI over UDP:
 +
;
 +
; Supported syntax for the source setting:
 +
;  Bind to default interface and receive data from port 12000
 +
;source=udp://:12000
 +
;
 +
;  Bind to interface with IP:192.168.1.22 and receive data from port 12000
 +
;source=udp://192.168.1.22:12000
 +
;
 +
;  Bind to interface with IP:192.168.1.22 and join multicast group:
 +
;  239.100.101.22 and receive data from port 12000
 +
;source=udp://192.168.1.22@239.100.101.22:12000
 +
;
 +
;  Bind to default interface (which routes to multicast) and join multicast
 +
;  group: 239.100.101.22 and receive data from port 12000
 +
;source=udp://@239.100.101.22:12000
 +
;
 +
; Maximum delay in milliseconds that the EDI input is willing to wait
 +
; before it timeouts
 +
;edi_max_delay=240
 +
; This EDI implementation does not support EDI Packet Resend
 +
 
 +
 
 +
[modulator]
 +
;  Mode 'fix' uses a fixed factor and is really not recommended. It is more
 +
; useful on an academic perspective for people trying to understand the DAB
 +
; modulation.
 +
;
 +
;  Mode 'max' is the normalization of every OFDM symbol. No overshoot, no
 +
; truncating, but varying output power (around 3dB) which might not be the best
 +
; for some power amplifier. The output samples are limited to a magnitude
 +
; of 32768.
 +
;
 +
;  Mode 'var' uses the method specified in ETSI 300 798 Clause 5.3. This method
 +
; normalizes to 4 times the standard deviation for an approximation of the RMS
 +
; power. So around 6/100000 samples will be truncated and will introduce some
 +
; really minor distortion. But this mode also maximizes the output power. This
 +
; is the gain mode recommended for real world operation as it is based on a DAB
 +
; standard; the only difference is that ODR-DabMod internally calculates this with
 +
; 32-bit floats instead of 8 bits.
 +
gainmode=var
 +
;
 +
;  In mode var, you can choose to normalise the samples to something else than
 +
; 4 times the standard deviation.
 +
;normalise_variance=4
 +
 
 +
; Transmission mode
 +
; If not defined, use Transmission Mode 1
 +
;mode=1
 +
 
 +
; The digital gain is a value that is multiplied to each sample. It is used
 +
; to tune the chain to make sure that no non-linearities appear up to the
 +
; USRP daughterboard programmable gain amplifier (PGA).
 +
; If there is clipping, the spectral quality of the signal will quickly deteriorate,
 +
; and wide-band noise will be generated.
 +
;
 +
; Be aware that there is a dependency with resampling.
 +
digital_gain=0.8
 +
 
 +
; Output sample rate. Values other than 2048000 enable
 +
; resampling.
 +
; Warning! digital_gain settings are different if resampling
 +
; is enabled or not !
 +
rate=2048000
 +
 
 +
; (DEPRECATED) CIC equaliser for USRP1 and USRP2
 +
; These USRPs have an upsampler in FPGA that does not have a flat frequency
 +
; response. The CIC equaliser compensates this. This setting is specific to
 +
; the USRP1 and USRP2 devices.
 +
; Set to 0 to disable CicEqualiser
 +
;dac_clk_rate=0
 +
 
 +
; The USRP1 does not have flexible clocking, you will need
 +
;rate=3200000
 +
; and
 +
;dac_clk_rate=128000000
 +
 
 +
; When nonzero, overlap ofdmwindowing samples from each OFDM symbol
 +
; onto the previous and next symbol, using a raised cosine window function.
 +
; This has the effect of smoothing the transition from one symbol to the next,
 +
; which improves spectrum shape.
 +
; In Transmission Mode I, every data symbol is composed of 2552 samples.
 +
;ofdmwindowing=10
 +
 
 +
; Settings for crest factor reduction. Statistics for ratio of
 +
; samples that were clipped are available through the RC.
 +
[cfr]
 +
enable=0
  
−
FICDecoder: EId 0x10A5: ensemble label 'Bayern'
+
; At what amplitude the signal should be clipped
 +
clip=50.0
 +
 
 +
; How much to clip the error signal used to compensate the effect
 +
; of clipping
 +
error_clip=0.1
 +
 
 +
[firfilter]
 +
; The FIR Filter can be used to create a better spectral quality.
 +
enabled=1
 +
 
 +
; The filter taps can be calculated with the python script
 +
; doc/fir-filter/generate-filter.py
 +
; If filtertapsfile is not given, the default taps are used.
 +
;filtertapsfile=simple_taps.txt
 +
 
 +
[poly]
 +
;Predistortion using memoryless polynom, see dpd/ folder for more info
 +
enabled=0
 +
polycoeffile=polyCoefs
 +
 
 +
[output]
 +
; choose output: possible values: uhd, file, zmq, soapysdr
 +
output=soapysdr
 +
 
 +
[fileoutput]
 +
; Two output formats are supported: In the default mode,
 +
; the file output writes I/Q float values (i.e. complex
 +
; float) to the file. The I and Q samples can take values up
 +
; to 810000 in absolute magnitude with gainmode FIX. With
 +
; gainmode VAR and FIX, they should never exceed 50000.
 +
;format=complexf
 +
;
 +
; The complexf_normalised format applies a compensation factor to the complexf
 +
; output to bring the range of the I and Q components to [-1.0 .. 1.0]. The
 +
; digital_gain is still applied on top of that normalisation.
 +
;format=complexf_normalised
 +
;
 +
; When the format is set to s8, the output writes I/Q 8-bit
 +
; signed integers, where the magnitude is multiplied by 128/50000
 +
; effectively mapping the gainmode VAR range of -50000 -- 50000
 +
; to -128 -- 128. For other gainmodes, use the digital_gain setting
 +
; to make sure you don't create clipping.
 +
;
 +
; The format u8 is the same as s8, except that the values are mapped
 +
; between 0 and 255. Use u8 for welle.io, qt-dab or other tools.
 +
;
 +
; Also supported is s16, with system endianness (little endian on x86_64 and ARM)
 +
format=s8
 +
 
 +
; The output file:
 +
filename=/dev/stdout
 +
 
 +
show_metadata=0
 +
 
 +
[uhdoutput]
 +
; The UHD output can be directly used with the Ettus USRP devices
 +
;
 +
; You have to set master_clock_rate to a multiple of the
 +
; sample_rate. Ideally, it should be
 +
;  master_clock_rate = 4 * sample_rate
 +
; or even a higher factor.
 +
;
 +
; Settings for the B200:
 +
device=
 +
master_clock_rate=32768000
 +
type=b200
 +
txgain=40
 +
; The B200 needs larger gains (up to 89dB) but,
 +
; "Gain settings are application specific, but it is recommended that users
 +
; consider using at least half of the available gain to get reasonable dynamic
 +
; range."
 +
;    From the B200 User Manual
 +
;    http://files.ettus.com/uhd_docs/manual/html/usrp_b200.html
 +
;
 +
; More information and measurements available on:
 +
; http://wiki.opendigitalradio.org/index.php/USRP_B200_Measurements
 +
 
 +
; You can set what TX and RX antennas to use. This will depend on the
 +
; USRP model you are using.
 +
;tx_antenna=
 +
;rx_antenna=RX2
 +
 
 +
 
 +
; Settings for a USRP B100:
 +
;device=
 +
; you can put additional UHD device settings here
 +
;master_clock_rate=32768000
 +
;type=b100
 +
;txgain=2.0
 +
; Try first with small gain values
 +
; Also set rate to 2048000
 +
 
 +
 
 +
; For the USRP1
 +
;device=
 +
;type=usrp1
 +
; the usrp1 can have two daughterboards, the subdevice parameter allows you
 +
; to choose which one to use
 +
;subdevice=A:0
 +
; The USRP1 doesn't support master_clock_rate, you need to enable resampling
 +
 
 +
 
 +
; You must specify either frequency or channel, but not both.
 +
;frequency=234208000
 +
channel=13C
 +
 
 +
; Override automatic analog frontend bandwidth calculation. Units: Hz
 +
;bandwidth=2000000
 +
 
 +
; Some USRP boards/frontends support setting an LO offset that has the
 +
; effect of shifting DC out of the signal bandwidth. This should also
 +
; improve IQ imbalance effects, because the mirror will centered on another
 +
; frequency (it should be on frequency + 2*lo_offset)
 +
;
 +
; The value can be negative, and its absolute value must be smaller than
 +
; master_clock_rate/2.
 +
;lo_offset=2048000
 +
 
 +
; The reference clock to use. The gpsdo is the ODR LEA-M8F board, the
 +
; official Ettus GPSDO is selected with gpsdo-ettus
 +
; possible values : internal, external, MIMO, gpsdo, gpsdo-ettus
 +
refclk_source=internal
 +
 
 +
; The reference one pulse-per second to use
 +
; possible values : none, external, MIMO, gpsdo
 +
pps_source=none
 +
 
 +
; Behaviour when external clock reference lock lost
 +
; possible values: ignore, crash
 +
behaviour_refclk_lock_lost=ignore
 +
 
 +
; The maximum accepted holdover time for the gpsdo once it
 +
; started operating. Initial check interval for GPSDO lock
 +
; at startup is always 180s.
 +
; Valid only if the refclk and pps_source are set to gpsdo.
 +
; Units: seconds
 +
; Set to 0 to disable holdover check
 +
; default value: 0
 +
max_gps_holdover_time=600
 +
 
 +
; Enable the TCP server to communicate TX and RX feedback for
 +
; digital predistortion.
 +
; Set to 0 to disable
 +
;dpd_port=50055
 +
 
 +
; section defining ZeroMQ output properties
 +
[zmqoutput]
 +
 
 +
; on which port to listen for connections
 +
; please see the Transports section in man zmq
 +
; for more information regarding the syntax
 +
listen=tcp://*:54001
 +
 
 +
; what ZMQ socket type to use. Valid values: PUB, REP
 +
; Please see man zmq_socket for documentation
 +
socket_type=pub
 +
 
 +
; section defining the SoapySDR output settings.
 +
[soapyoutput]
 +
; These options are given to the SoapySDR library:
 +
device=driver=hackrf
 +
;master_clock_rate=32768000
 +
txgain=61
 +
; 47
 +
frequency=180064000
 +
; channel=5D
 +
; 13C
 +
;lo_offset=2048000
 +
 
 +
; Override automatic analog frontend bandwidth calculation. Units: Hz
 +
;bandwidth=2000000
 +
 
 +
; You can set what TX antenna to use. This will depend on the
 +
; SDR device you are using.
 +
;tx_antenna=
 +
 
 +
; Enable the TCP server to communicate TX and RX feedback for
 +
; digital predistortion.
 +
; Set to 0 to disable
 +
;dpd_port=50055
 +
 
 +
; Used for running single-frequency networks
 +
[delaymanagement]
 +
; Enable handling of timestamps for SFN
 +
synchronous=0
 +
 
 +
; Whether to mute the TX when incoming frames have no timestamp
 +
mutenotimestamps=0
 +
 
 +
; This offset is added to the TIST, and the sum defines the
 +
; TX time of the transmission frame. It can by changed at runtime
 +
; through the remote control.
 +
offset=0.002
 +
 
 +
; The way the timestamps are interpreted in ODR-DabMod up to v1.1.0 was not
 +
; specified, and you should not assume that two different versions will
 +
; transmit synchronously given the same settings. Always run SFNs with
 +
; identical versions!
 +
; Furthermore, when combining ODR-DabMod with third-party modulators, always
 +
; measure!
 +
 
 +
 
 +
[tii]
 +
; If these options are set, TII transmission is enabled.
 +
; DAB modes I and II are supported, and must be set explicitly in
 +
; this file. Reading DAB mode from ETI is not supported.
 +
enable=0
 +
; comb is also known as sub-identifier.
 +
comb=1
 +
; pattern is also known as main-identifier. If you run several transmitters
 +
; in SFN, it is better to use the same pattern for all, and vary the comb.
 +
; Otherwise identification of the transmitters may be more difficult.
 +
pattern=11
 +
; There are two variants of TII being used. The old variant that uses the wrong
 +
; phase on the second carrier in each carrier pairs and is therefore not
 +
; conforming to the specification. Modern analysers can decode both variants,
 +
; while others, like the Philips DAB752 and the VAD v2 monitor are known to
 +
; decode only the old non-conforming variant.
 +
old_variant=0
 
</pre>
 
</pre>
  
−
Be sure that the signal strength indicator is above 70% / SNR 10 otherwise there can be dropouts
+
=== Further Links ===
 +
 
 +
* https://radioempfang.digital/dab-ueber-satellit
 +
* https://github.com/piratfm/eti-tools

Latest revision as of 14:14, 25 July 2019

DAB/DAB+

DAB/DAB+ channels can be found on satellite 7.0 east. 

Frequency:12572 MHz
Symbolrate: 10215000
Modulation: DVB-S2/QPSK
Polarization: Vertical

Locking on Transponder: 

/opt/bin/mediaclient -m DVBS2 -f 12572000 -M QPSK -S 10215000 -V V -E 3/4

FileOutput

capturing and replaying the stream:

/opt/bin/mediaclient --cat /dev/dvb/adapter0/dvr0 | ../eti-tools/fedi2eti 101 239.16.242.17 60017 | ./odr-dabmod -C doc/example.ini > test.iq

hackrf_transfer -t test.iq -f 180064000 -x 47 -a 1 -s 2048000 -b 1750000 

example.ini (parts of it):

[output]
; choose output: possible values: uhd, file, zmq, soapysdr
output=file
[fileoutput]
; Two output formats are supported: In the default mode,
; the file output writes I/Q float values (i.e. complex
; float) to the file. The I and Q samples can take values up
; to 810000 in absolute magnitude with gainmode FIX. With
; gainmode VAR and FIX, they should never exceed 50000.
;format=complexf
;
; The complexf_normalised format applies a compensation factor to the complexf
; output to bring the range of the I and Q components to [-1.0 .. 1.0]. The
; digital_gain is still applied on top of that normalisation.
;format=complexf_normalised
;
; When the format is set to s8, the output writes I/Q 8-bit
; signed integers, where the magnitude is multiplied by 128/50000
; effectively mapping the gainmode VAR range of -50000 -- 50000
; to -128 -- 128. For other gainmodes, use the digital_gain setting
; to make sure you don't create clipping.
;
; The format u8 is the same as s8, except that the values are mapped
; between 0 and 255. Use u8 for welle.io, qt-dab or other tools.
;
; Also supported is s16, with system endianness (little endian on x86_64 and ARM)
format=s8

; The output file:
filename=/dev/stdout

show_metadata=0

Soapy Output

/opt/bin/mediaclient --cat /dev/dvb/adapter0/dvr0 | ../eti-tools/fedi2eti 101 239.16.242.17 60017 | ./odr-dabmod -C doc/example.ini



[soapyoutput]
; These options are given to the SoapySDR library:
device=driver=hackrf
;master_clock_rate=32768000
txgain=47
frequency=180064000

Soapy Config

Full Sample configuration: 

; Sample configuration file for ODR-DabMod

[remotecontrol]
; The RC feature is described in detail in doc/README-RC.md

; enable the telnet remote control on localhost:2121
telnet=1
telnetport=2121

; Enable zmq remote control.
zmqctrl=1
zmqctrlendpoint=tcp://127.0.0.1:9400
; accepted formats according to man zmq_bind, i.e.
; tcp://<interface>:<port>, e.g. tcp://lo:9400
; and tcp://<ipaddress>:<port>

[log]
; Write to a logfile or to syslog.
; Setting filename to stderr is not necessary, as all messages are
; automatically written to stderr.
syslog=0
filelog=0
filename=odr-dabmod.log

[input]
; A file or fifo input is using transport=file
transport=file
source=/dev/stdin

; When the end of file is reached, it is possible to rewind it
loop=0

; ETI-over-TCP example:
;transport=tcp
;source=localhost:9200

; When recieving data using ZeroMQ, the source is the URI to be used
;transport=zeromq
;source=tcp://localhost:9100
; The option max_frames_queued defines the maximum number of ETI frames
; (frame duration: 24ms) that can be in the input queue
;max_frames_queued=100

; EDI input.
; Listen for EDI data on a given UDP port, unicast or multicast.
;transport=edi
;
; EDI over TCP:
;
; Connect to TCP server on a given host
;source=tcp://localhost:9201
;
; EDI over UDP:
;
; Supported syntax for the source setting:
;  Bind to default interface and receive data from port 12000
;source=udp://:12000
;
;  Bind to interface with IP:192.168.1.22 and receive data from port 12000
;source=udp://192.168.1.22:12000
;
;  Bind to interface with IP:192.168.1.22 and join multicast group:
;  239.100.101.22 and receive data from port 12000
;source=udp://192.168.1.22@239.100.101.22:12000
;
;  Bind to default interface (which routes to multicast) and join multicast
;  group: 239.100.101.22 and receive data from port 12000
;source=udp://@239.100.101.22:12000
;
; Maximum delay in milliseconds that the EDI input is willing to wait
; before it timeouts
;edi_max_delay=240
; This EDI implementation does not support EDI Packet Resend


[modulator]
;   Mode 'fix' uses a fixed factor and is really not recommended. It is more
; useful on an academic perspective for people trying to understand the DAB
; modulation.
;
;   Mode 'max' is the normalization of every OFDM symbol. No overshoot, no
; truncating, but varying output power (around 3dB) which might not be the best
; for some power amplifier. The output samples are limited to a magnitude
; of 32768.
;
;   Mode 'var' uses the method specified in ETSI 300 798 Clause 5.3. This method
; normalizes to 4 times the standard deviation for an approximation of the RMS
; power. So around 6/100000 samples will be truncated and will introduce some
; really minor distortion. But this mode also maximizes the output power. This
; is the gain mode recommended for real world operation as it is based on a DAB
; standard; the only difference is that ODR-DabMod internally calculates this with
; 32-bit floats instead of 8 bits.
gainmode=var
;
;   In mode var, you can choose to normalise the samples to something else than
; 4 times the standard deviation.
;normalise_variance=4

; Transmission mode
; If not defined, use Transmission Mode 1
;mode=1

; The digital gain is a value that is multiplied to each sample. It is used
; to tune the chain to make sure that no non-linearities appear up to the
; USRP daughterboard programmable gain amplifier (PGA).
; If there is clipping, the spectral quality of the signal will quickly deteriorate,
; and wide-band noise will be generated.
;
; Be aware that there is a dependency with resampling.
digital_gain=0.8

; Output sample rate. Values other than 2048000 enable
; resampling.
; Warning! digital_gain settings are different if resampling
; is enabled or not !
rate=2048000

; (DEPRECATED) CIC equaliser for USRP1 and USRP2
; These USRPs have an upsampler in FPGA that does not have a flat frequency
; response. The CIC equaliser compensates this. This setting is specific to
; the USRP1 and USRP2 devices.
; Set to 0 to disable CicEqualiser
;dac_clk_rate=0

; The USRP1 does not have flexible clocking, you will need
;rate=3200000
; and
;dac_clk_rate=128000000

; When nonzero, overlap ofdmwindowing samples from each OFDM symbol
; onto the previous and next symbol, using a raised cosine window function.
; This has the effect of smoothing the transition from one symbol to the next,
; which improves spectrum shape.
; In Transmission Mode I, every data symbol is composed of 2552 samples.
;ofdmwindowing=10

; Settings for crest factor reduction. Statistics for ratio of
; samples that were clipped are available through the RC.
[cfr]
enable=0

; At what amplitude the signal should be clipped
clip=50.0

; How much to clip the error signal used to compensate the effect
; of clipping
error_clip=0.1

[firfilter]
; The FIR Filter can be used to create a better spectral quality.
enabled=1

; The filter taps can be calculated with the python script
; doc/fir-filter/generate-filter.py
; If filtertapsfile is not given, the default taps are used.
;filtertapsfile=simple_taps.txt

[poly]
;Predistortion using memoryless polynom, see dpd/ folder for more info
enabled=0
polycoeffile=polyCoefs

[output]
; choose output: possible values: uhd, file, zmq, soapysdr
output=soapysdr

[fileoutput]
; Two output formats are supported: In the default mode,
; the file output writes I/Q float values (i.e. complex
; float) to the file. The I and Q samples can take values up
; to 810000 in absolute magnitude with gainmode FIX. With
; gainmode VAR and FIX, they should never exceed 50000.
;format=complexf
;
; The complexf_normalised format applies a compensation factor to the complexf
; output to bring the range of the I and Q components to [-1.0 .. 1.0]. The
; digital_gain is still applied on top of that normalisation.
;format=complexf_normalised
;
; When the format is set to s8, the output writes I/Q 8-bit
; signed integers, where the magnitude is multiplied by 128/50000
; effectively mapping the gainmode VAR range of -50000 -- 50000
; to -128 -- 128. For other gainmodes, use the digital_gain setting
; to make sure you don't create clipping.
;
; The format u8 is the same as s8, except that the values are mapped
; between 0 and 255. Use u8 for welle.io, qt-dab or other tools.
;
; Also supported is s16, with system endianness (little endian on x86_64 and ARM)
format=s8

; The output file:
filename=/dev/stdout

show_metadata=0

[uhdoutput]
; The UHD output can be directly used with the Ettus USRP devices
;
; You have to set master_clock_rate to a multiple of the
; sample_rate. Ideally, it should be
;   master_clock_rate = 4 * sample_rate
; or even a higher factor.
;
; Settings for the B200:
device=
master_clock_rate=32768000
type=b200
txgain=40
; The B200 needs larger gains (up to 89dB) but,
; "Gain settings are application specific, but it is recommended that users
; consider using at least half of the available gain to get reasonable dynamic
; range."
;    From the B200 User Manual
;    http://files.ettus.com/uhd_docs/manual/html/usrp_b200.html
;
; More information and measurements available on:
; http://wiki.opendigitalradio.org/index.php/USRP_B200_Measurements

; You can set what TX and RX antennas to use. This will depend on the
; USRP model you are using.
;tx_antenna=
;rx_antenna=RX2


; Settings for a USRP B100:
;device=
; you can put additional UHD device settings here
;master_clock_rate=32768000
;type=b100
;txgain=2.0
; Try first with small gain values
; Also set rate to 2048000


; For the USRP1
;device=
;type=usrp1
; the usrp1 can have two daughterboards, the subdevice parameter allows you
; to choose which one to use
;subdevice=A:0
; The USRP1 doesn't support master_clock_rate, you need to enable resampling


; You must specify either frequency or channel, but not both.
;frequency=234208000
channel=13C

; Override automatic analog frontend bandwidth calculation. Units: Hz
;bandwidth=2000000

; Some USRP boards/frontends support setting an LO offset that has the
; effect of shifting DC out of the signal bandwidth. This should also
; improve IQ imbalance effects, because the mirror will centered on another
; frequency (it should be on frequency + 2*lo_offset)
;
; The value can be negative, and its absolute value must be smaller than
; master_clock_rate/2.
;lo_offset=2048000

; The reference clock to use. The gpsdo is the ODR LEA-M8F board, the
; official Ettus GPSDO is selected with gpsdo-ettus
; possible values : internal, external, MIMO, gpsdo, gpsdo-ettus
refclk_source=internal

; The reference one pulse-per second to use
; possible values : none, external, MIMO, gpsdo
pps_source=none

; Behaviour when external clock reference lock lost
; possible values: ignore, crash
behaviour_refclk_lock_lost=ignore

; The maximum accepted holdover time for the gpsdo once it
; started operating. Initial check interval for GPSDO lock
; at startup is always 180s.
; Valid only if the refclk and pps_source are set to gpsdo.
; Units: seconds
; Set to 0 to disable holdover check
; default value: 0
max_gps_holdover_time=600

; Enable the TCP server to communicate TX and RX feedback for
; digital predistortion.
; Set to 0 to disable
;dpd_port=50055

; section defining ZeroMQ output properties
[zmqoutput]

; on which port to listen for connections
; please see the Transports section in man zmq
; for more information regarding the syntax
listen=tcp://*:54001

; what ZMQ socket type to use. Valid values: PUB, REP
; Please see man zmq_socket for documentation
socket_type=pub

; section defining the SoapySDR output settings.
[soapyoutput]
; These options are given to the SoapySDR library:
device=driver=hackrf
;master_clock_rate=32768000
txgain=61
; 47
frequency=180064000
; channel=5D
; 13C
;lo_offset=2048000

; Override automatic analog frontend bandwidth calculation. Units: Hz
;bandwidth=2000000

; You can set what TX antenna to use. This will depend on the
; SDR device you are using.
;tx_antenna=

; Enable the TCP server to communicate TX and RX feedback for
; digital predistortion.
; Set to 0 to disable
;dpd_port=50055

; Used for running single-frequency networks
[delaymanagement]
; Enable handling of timestamps for SFN
synchronous=0

; Whether to mute the TX when incoming frames have no timestamp
mutenotimestamps=0

; This offset is added to the TIST, and the sum defines the
; TX time of the transmission frame. It can by changed at runtime
; through the remote control.
offset=0.002

; The way the timestamps are interpreted in ODR-DabMod up to v1.1.0 was not
; specified, and you should not assume that two different versions will
; transmit synchronously given the same settings. Always run SFNs with
; identical versions!
; Furthermore, when combining ODR-DabMod with third-party modulators, always
; measure!


[tii]
; If these options are set, TII transmission is enabled.
; DAB modes I and II are supported, and must be set explicitly in
; this file. Reading DAB mode from ETI is not supported.
enable=0
; comb is also known as sub-identifier.
comb=1
; pattern is also known as main-identifier. If you run several transmitters
; in SFN, it is better to use the same pattern for all, and vary the comb.
; Otherwise identification of the transmitters may be more difficult.
pattern=11
; There are two variants of TII being used. The old variant that uses the wrong
; phase on the second carrier in each carrier pairs and is therefore not
; conforming to the specification. Modern analysers can decode both variants,
; while others, like the Philips DAB752 and the VAD v2 monitor are known to
; decode only the old non-conforming variant.
old_variant=0

Further Links

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