Organize and Share your Electronics the way you want. Sign-Up for a free account now. It takes only 30 seconds!

Sound Card Interfacing for RTTY, PSK31, and SSTV

Sound Card Interfacing for RTTY,  PSK31, and SSTV

The above circuit is recommended for use in SSTV applications with use of the sound card with a computer. This is the JVComm style of interface. This circuit may also be used for RTTY and PSK31 applications. Many users modify the above circuit to include 1:1 isolation transformers within the Speaker out and Line-in or microphone in lines. These isolation transformers are used to preclude ground loops within a system from introducing hum and interference on the transmitted signals.
The following circuit is used in applications of WinRtty for receiving RTTY signals using the sound card. This circuit is also applicable to SSTV and PSK31 modes and works well in all three applications. This circuit may be implemented into the JVComm interface shown above as discussed in the JVComm interface text. Note that the sound board and receiver are transposed in the two circuits.
The following circuit is used in applications of WinRtty for transmitting RTTY signals using the sound card. Notice this circuit does not have a PTT component and relies on VOX for transmit control. This circuit is also applicable to SSTV and PSK31 modes and works well in all three applications. This circuit may be implemented into the JVComm interface shown above as discussed in the JVComm interface text. Note that the sound board and transmitter are transposed in the two circuits.

Visit Here for more.







 

More Articles to Read

CTCSS fingerprinting: A method for transmitter identification
CTCSS fingerprinting: A method for transmitter identification
TI DLP® Pico™ Technology for Aftermarket Head-up Displays
TI DLP® Pico™ Technology for Aftermarket Head-up Displays
Brute force computation for cheap log digital potentiometer
Brute force computation for cheap log digital potentiometer
Smart "Homer"
Smart "Homer"
A DIY Segway-style vehicle
A DIY Segway-style vehicle
Superbeta transistors inside: Die photos and analysis of the LM108 op amp
Superbeta transistors inside: Die photos and analysis of the LM108 op amp
Peeqo is a desktop bot that communicates through GIFs
Peeqo is a desktop bot that communicates through GIFs
Using a Programmable Input Multiplier to Minimize Integer Boundary Spurs
Using a Programmable Input Multiplier to Minimize Integer Boundary Spurs
Serial seven segment LED display shield
Serial seven segment LED display shield
G-code controlled drawing plotter
G-code controlled drawing plotter

Top


Shares