How to decode SSTV images with QSSTV

decode SSTV with QSSTV

Estimated reading time: 3 minutes

While there’s plenty of ham radio software available for Windows you can easily find yourself out of luck if you are a Linux-running radio fiend. On Windows you can easily decode SSTV images with MMSSTV. This article describes how to decode SSTV images with QSSTV, an open source Qt-based SSTV decoder software.

Install QSSTV

You can either simply install QSSTV via packet manager …

sudo apt-get install qsstv

… or you can compile QSSTV from source following the official manual.

Once QSSTV has been successfully installed you can start it via terminal:

qsstv

The QSSTV GUI after start should look similar to this:

QSSTV after start
QSSTV 9.4.4 GUI after startup

Configure QSSTV

For receiving SSTV images from the ISS I am using a receive setup consisting of (among other components) my trusted Yaesu FT-817ND and a TigerTronics SignaLink USB sound-card. When connecting the SignaLink modem via USB to my computer I’m seeing the following output on the kernel log.

[  +0,152468] usb 1-2: New USB device found, idVendor=08bb, idProduct=29c6, bcdDevice= 1.00
[  +0,000006] usb 1-2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[  +0,000003] usb 1-2: Product: USB AUDIO  CODEC
[  +0,000003] usb 1-2: Manufacturer: BurrBrown from Texas Instruments
[  +0,014568] input: BurrBrown from Texas Instruments USB AUDIO  CODEC as /devices/pci0000:00/0000:00:14.0/usb1/1-2/1-2:1.3/0003:08BB:29C6.000B/input/input45
[  +0,057175] hid-generic 0003:08BB:29C6.000B: input,hidraw8: USB HID v1.00 Device [BurrBrown from Texas Instruments USB AUDIO  CODEC] on usb-0000:00:14.0-2/input3

If you are using a permanently installed sound-card or microphone to „grab“ the audio SSTV base-band signal you can also use the following command to obtain a list of all available sound devices:

arecord --list-pcms

In order to receive or transmit you have to configure the correct input audio device. This can be done via menu „Options -> Configure“. If you are using a different sound-card you’ll need to select a different input audio device. (Configuring an output audio device is only necessary if you also intend to transmit SSTV images).

configure audio input device to decode sstv with qsstv
Configure the correct audio input device via menu „Configure -> Options“

Video: Decode SSTV with QSSTV

The following video shows how to decode SSTV with QSSTV during live-reception of SSTV images received from the International Space Station (ISS).

You have now all the information you need to start and decode SSTV images using QSSTV. Happy SSTV decoding on Linux!




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