---
name: "odr-dabmod"
section: "1"
platform: "linux"
package: "odr-dabmod"
version: "3.0.0+ds-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/odr-dabmod"
---

# odr-dabmod(1)

DAB modulator compliant to ETSI EN 300 401

## NAME

odr-dabmod - DAB modulator compliant to ETSI EN 300 401

## SYNOPSIS

**odr-dabmod** \<configuration\_file\>

**odr-dabmod** input (**-f** filename **-F** format \| **-u** uhddevice **-F** frequency) \[**-o** offset\]\[**-G** txgain\] \[**-T** filter\_taps\_file\] \[**-a** gain\] \[**-c** clockrate\] \[**-g** gainMode\]  \[**-m** dabMode\] \[**-r** samplingRate\] \[**-l**\] \[**-h**\]

Where input is:

-

  ETI input filename (default: stdin), or

-

  tcp://source:port for ETI-over-TCP input, or

-

  zmq+tcp://source:port for ZMQ input, or

-

  udp://:port for EDI input.

## DESCRIPTION

ODR-DabMod is a software-defined DAB modulator that receives or reads ETI, and generates modulated I/Q data usable for transmission. It can directly  interface the Ettus USRP devices, and can also be used with other SDR signal sources.

This I/Q data which is encoded as complex floats (32bits per complex sample) can be written to a file or pipe, sent to a USRP device using the integrated output for the open-source USRP Hardware Driver (UHD) or to other software-defined radio (SDR) devices using the SoapySDR5 library.

The output of the modulator can also be sent to a GNURadio flow-graph for further processing, conversion or analysis using a ZeroMQ network connection.

## OPTIONS

- **-f**

  Use file output with given filename. (use */dev/stdout* for standard output)

- **-F**

  Set the output format (see doc/example.ini for formats) for the file output.

- **-o**

  Set the timestamp offset added to the timestamp in the ETI. The offset is a double.

-

  Specifying this option has two implications: It enables synchronous transmission, requiring an external REFCLK and PPS signal and frames that do not contain a valid timestamp get muted.

- **-u**

  Use UHD output with given device string. (use  for default device)

- **-F**

  Set the transmit frequency when using UHD output. (mandatory option when using UHD)

- **-G**

  Set the transmit gain for the UHD driver (default: 0)

- **-T**

  Enable filtering before the output, using the specified file containing the filter taps.

-

  Use 'default' as taps\_file to use the internal taps.

- **-a**

  Apply digital amplitude gain.

- **-c**

  Set the DAC clock rate and enable Cic Equalisation.

- **-g**

  Set computation gain mode: fix, max or var

- **-m**

  Set DAB mode: (0: auto, 1-4: force).

- **-r**

  Set output sampling rate (default: 2048000).

- **-l**

  Loop file when reach end of file.

- **-h**

  Print this help.

## SEE ALSO

[odr-dabmux(1)](/odr-dabmux/1.md)

A user guide for the mmbTools is available http://www.opendigitalradio.org/