path: root/doc/example.ini

; 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

[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:8080
; The option max_frames_queued defines the maximum number of ETI frames
; that can be in the input queue
;max_frames_queued=100

; EDI input.
; Listen for EDI data on a given UDP port
;transport=edi
;source=udp://:12002
; Maximum delay in milliseconds that the EDI input is willing to wait
; before it timeouts
;edi_max_delay=240
; No support yet for multicast, should work with and without PFT
; 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, take the mode from ETI
;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
; Set to 0 to disable CicEqualiser
; when set to 400000000, an additional USRP2 check is enabled.
; See DabModulator.cpp line 186
;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=uhd

[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.
;format=s8

; The output file:
filename=ofdm.iq

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

; 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.
; Valid only if the refclk and pps_source are set to gpsdo.
; This value is also used for the initial lock check, and must
; be at least a minute so that the GPSOD has enough time to lock
; and to start disciplining its oscillator.
; 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 informat io 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=
master_clock_rate=32768000
txgain=40
;frequency=234208000
channel=13C
;lo_offset=2048000

; 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