Channel Tx plugins

These plugins live on the transmission (Tx) side. Plugins can be used as a sink of audio (media in general) or as a digital signal gennerator. They send I/Q data in a "channel" that is a piece of spectrum that is later assembled in the larger spectrum sent to the output device sink plugin.

The plugins documented here are:

AIS modulator plugin

This plugin can be used to transmit AIS messages. The user interface is described here

AM modulator plugin

This plugin is used to produce a relatively narrowband (1 to 40 kHz) AM modulated signal. The user interface is described here

ATV modulator plugin

This plugin is used to produce analog TV signals suitable for Amateur TeleVision. Some of the standards are compatible with commercial analog TV sets (PAL 625 lines and PAL 535 lines). Images are gray scale (Black and White) and there is no sound carrier. Low refresh rates (FPS) and small number of lines are implemented to support NBTV (Narrow Band TV). Interface is described here

Chirp Chat modulator plugin

Chirp Chat is an experimental mode developed only in SDRangel based on chirp modulation analogous to LoRa. This version can work at extremely low SNR. In fact it can also encode LoRa messages. The user interface is described here

DATV modulator plugin

This plugin can be used to generate DVB-S signals for Digital Amateur TeleVision. The user interface is described here

File source plugin

This plugin can be used to read I/Q samples from a file recorded in .sdriq format. The user interface is described here

FreeDV modulator plugin

This plugin can be used to generate a signal using the FreeDV digital mode (see: https://freedv.org). The user interface is described here

IEEE 802.15.4 modulator plugin

This plugin implements an IEEE 802.15.4 modulator. 802.15.4 is a low-rate, wireless personal area networking standard, used by ZigBee, 6LoWPAN and various Smart Energy networks.

Supported PHYs include: 20kbps BPSK, 40kbps BPSK, 100kpbs <1GHZ O-QPSK, 250kpbs <1GHz O-QPSK and 250kbps 2.4GHz O-QPSK

The user interface is described here

Local source plugin

This plugin is used to retrieve the samples sent from another device set in the same instance of SDRangel that uses a local output plugin. The user interface is described here

M17 modulator plugin

This plugin encodes and modulates transmissions made in the M17 protocol. M17 is a fully Open Source and Open Source audio codec based project (Codec2) for FM based digital voice amateur radio. More information is available here. The user interface is described here

NFM modulator plugin

This plugin is used to produce a narrow band FM signal (1 to 40 kHz) with deviation up to 25 kHz. The user interface is described here

Packet modulator plugin

This plugin is used to transmit AX.25 Packet Radio frames. The user interface is described here

Remote source plugin

This plugin can be used to receive samples from a distant instance of SDRangel that uses the remote output plugin to send its samples over the network. The user interface is described here

RTTY modulator plugin

This plugin is used to transmit RTTY (Radio Teletype). The user interface is described here

SSB modulator plugin

This plugin is used to produce SSB (or DSB, or CW) signal often used by Amateur Radio. The user interface is described here

UDP source plugin

This plugin can be used to receive samples from an application over the network using UDP blocks. For example this can be used to make a connection from GNUradio using its UDP sink block. It can also be used with a UDP source block in a transponder configuration within SDRangel. Also some of the Rx plugins provide an optional UDP output with their audio that can be used for a similar purpose. Note that only the UDP source provides I/Q samples and is therefore suitable for a linear transponder. The user interface is described here

This is different from the Daemon sink which purpose is to send the full baseband with no further filtering and no interpolation other than powers of two.

WFM modulator plugin

This plugin is used to produce a wide band FM signal (1 to 250 kHz) with deviation up to 100kHz. The user interface is described here

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