DTMF Decoder

 

Availability

 

SkySweeper STD : NO

SkySweeper STD+ : YES

SkySweeper PRO : YES

 

General Description

The SkySweeper DTMF decoder supports the configurable DTMF tone rate decoding. This decoder assumes that the has the frequency accuracy of +-30 Hz to decode properly.

Configuration

Pressing the ‘Config’ button opens the following Configuration dialog box.

 

 

 

 

Parameters

 

Tone Length

This is the DTMF symbol length. One DTMF symbol consists of two tones.

Baud Rate

The is DTMF baud rate (1/Tone Length).

 

FFT

The FFT button opens and closes the power spectrum window. You can for example close the power spectrum window when the decoder has locked into correct frequency in order to get more space for text window

 

Save

The save button opens the log file control dialog, which is used to open or close a log file. The detector text window can be also saved into file or sent into socket.

 

Lock

In the HFDL pressing ‘Lock’ stops the AFC (automatic frequency correction) and the decoder is tuned to fixed 1440 Hz frequency. Please Note! Stopping AFC is not recommended in normal cases because the decoder loses it capability to handle frequency error. Push ‘Unlock’ button to activate AFC again.

 

Reset

The reset button resets the decoder and clears the text window.