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Rascal R6 300 Manual do Utilizador

Consulte online ou descarregue Manual do Utilizador para Scooters Rascal R6 300. Get Your Feet Wet with PSK31 Manual do Utilizador

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Get Your Feet Wet with PSK31
Clint Hurd - KK7UQ
Terry Dettman - WX7S - SGC
Presented at SEAPAC
Seaside, Oregon
June 14, 2003
Get Your Feet Wet with PSK31
Outline of Presentation
• Basics -Sound Card Applications
• Basics - Interface Requirements
• BPSK concept, demo & tour of Digipan
• MFSK concept, demo & tour of MixW
• Build your own interface
• Review of commercial interfaces
• Review of available software
Basics of Sound Card
Applications
• Audio frequency in 200 to 5000 Hz range
• Modulation of audio “carrier” using
software and sound card
• Transported via SSB radio
• Received by rig and converted back to
audio spectrum
• Decode done using software and sound card
• Combo of Software, PC, Sound Card, SSB Rig &
Interface
•Software
– Spectrum display to 5 Hz resolution (step size)
– Bandpass filter for signal - 50 Hz
– Encode/Decode of signal
– Graphic User Interface (GUI)
• PC - Windows 95 or later, 100 MHz or faster
Sound Card Applications - Basics
Sound Card Applications - Basics
•Rig
– SSB in either USB or LSB
– Reasonable frequency stability
– Tight filters NOT needed in most cases
– Can NOT use ALC or Compression on
Transmit
– Must stay within TX bandwidth - typically
2200 Hz or less
•Interface
– Connects the Rig to the PC Soundcard
Sound Card Operating Modes
Basic Hardware Interface
SC Spkr Out Attenuator Mic In
SC Mic In
Spkr Out
Level ShifterSerial Out (RTS) PTT
1 V p-p
1 V p-p
+- 12V Closure to Gnd
10 mV p-p
Sound Card Modes - Interface Block Diagram
Computer
Ham Rig
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Resumo do Conteúdo

Página 1 - Computer

1Get Your Feet Wet with PSK31Clint Hurd - KK7UQTerry Dettman - WX7S - SGCPresented at SEAPACSeaside, OregonJune 14, 2003Get Your Feet Wet with PSK31Ou

Página 2

2Sound Card Interface Requirements• Audio from Receiver to PC– Signal level 5 Vp-p, typical signal is 1 Vp-p– Audio frequency range from 200 to 4000 H

Página 3 - PSK31 with Digipan

3BPSK Excerpt of VaricodeNote that lower case letters have shorter word lengthsSGC 2020-DSP Setup for Sound Card ModesDigipan Screen with PSK SignalsD

Página 4 - Comparison of Digital Modes

4Other Modes - PSK63• Designed for contest work• Faster than RTTY on data rate and exchange -100 wpm effective rate• Better S/N than RTTY within 3db o

Página 5 - Sound Card Interface Sources

5MixW Screen with MFSK SignalsBuild Your Own Interfacekk7uq Interface Model IIBuild Your Own Interface• Interface Kit $55.00• Shielded Audio Cables $5

Página 6 - Sound Card Modes Software

6Sound Card Modes SoftwarePSK31 - BPSKPSK31-QPSKMFSK-8MFSK-16RTTYCWHellschreiberName/Screen PopLog SupportedDigipan X X X Internal http://www.digipan.

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