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