PSK31

To use this app, you need to feed the audio output from a your radio into the device. You can do this via one of several ways:

Set the device near the radio's speaker to pick up the audio. While easy to do, this is not ideal, as background noise can interfere with the audio, causing garbled decodes.
Plug headphones into the radio, and set one earphone near the mic. I find that with good quality headphones, this can work extremely well.
Use the microphone input jack of your device, by obtaining an appopriate cable and connecting the radio's line level output to the microphone input.
With the Camera Connection Kit, you can plug a USB sound input device into the iPad, and use a patch cable between it and the radio's audio output. This is by far the best solution.

You can use the volume indicator in the upper right corner to verify that audio is getting into your device, and that the volume level is appropriate.

If you are running iOS 7 or later, be sure to give the app permission to use the microphone. If you denied permission, you can always give it again by following these steps:

Open Settings app and go to "Privacy"
Select "Microphone" to get a list of all apps that have requested access to the microphone, and to control which apps have access to the microphone

If you're looking for a radio to use with the app, there are many different types to choose from. Take a look at our listing of radios to use with your app, to see several, along with some suggestions on how to choose a radio.

The waterfall display continuously updates, showing a spectrum of audio in the 600 - 2300 Hz range. Lighter colors are stronger signals. PSK31 signals will be obvious in the waterfall, look at the screenshot on our webpage for an example.

You can tap a PSK31 transmission on the waterfall to select that frequency. Since it is sometimes difficult to touch exactly in the center of the transmission, you can use the + and - buttons next to the frequency to increment or decrement it by 1 Hz. You can also directly enter in a frequency.

Want to clear the text? Give your iPad a shake!

That's it!

Here are some details on directly connecting an audio line source to your iPad/iPhone/iPod Touch

PSK31 Frequencies

 1838.15 kHz	160 meters
 3580.15 kHz	80 meters
 7035.00 kHz	40 meters (regions 1 and 3)
 7080.15 kHz	40 meters (region 2, 7070.15 observed))
10142.15 kHz	30 meters
14070.15 kHz	20 meters
18100.15 kHz	17 meters
21080.15 kHz	15 meters (21070.15 observed)
24920.15 kHz	12 meters
28120.15 kHz	10 meters
50290.00 kHz	6 meters

Email your comments and questions to support@blackcatsystems.com

Last modified August 11, 2010