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PC
sound card based Real-time
DSP filter and Spectrum scope
In
my spare time I am working to improve this program. If you have any suggestion
or want a particular functionality implemented please let me know.VA3AGM.
- The program takes the
input from a audio
source. In Rx mode it can be the Line-In of the sound card. The input
signal can be filtered using a Low
Pass, High Pass
or Stop band programmable DSP filter. The processed input is fed to
the PC's speaker. The unprocessed or processed signal can be displayed
in the Spectrum Display window.
- For Tx mode the input is the PC
Microphone (you need to interface the PC with the transceiver).
Some useful hints:
M1-M5 memory buttons
- used to apply a saved filter configuration
- right click to save the current working configurations (not saved to
registry at this time)
P1-P3 buttons
- used to play a registered message (like CQ CONTEST CQ ...)
- right click to start recording to a predefined file (for max 30 sec) into
the TEMP directory (should be in Tx mode).
Max button
- click to set the Stop band filter central frequency on strongest signal
- by clicking on the Spectrum window will also set the filter to corresponding
frequency (right click to delete the dotted vertical line)
- check the "stop" checkbox to activate the stop band filter
Tx button
- when activated will switch the audio input from LINE-IN to Microphone and
will activate the DTR and RTS signals for the selected COM port
Spectrum scope window
- vertical bars are spaced at 500hz. The red ones to mark 1khz, 2khz and 3khz
- horizontal bars when logarithmic view is selected (log checkbox) are spaced
at 20db starting with 0db at the bottom.
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filter.zip
Updated August , 2014
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PC
sound card based Signal Generator
Can generate USB, LSB and DSB signal. Must use AF3 generator for the
carrier frequency.
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af_gen.exe
Updated Nov 12, 2003
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CW software
Generates Morse messages from text and saves them as wav files (can be
easy converted to MP3 format). Random text generation.
To generate random text: click on "Clear" button to delete the
text from the transmission window. Type the desired characters (ie. QFHL) in "Random
TX" edit box and check the
"A" check box. Click on Transmit button.
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cw_machine.exe
Updatet Nov 27, 2003
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