PSK31 ????

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PSK31 ????

1. PSK31?? ?????
2. PTT module??
3. ????? ?? ? ????
4. Parts
5. ??? ??
6. ?? ???
7. ????

DS5EVU / HL0EZK Kyeongwoo Im
ds5evu_at_bada.hhu.ac.kr Sep. 27. 2003
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PSK31?? ?????
PSK31 is a new digital mode

• Designed by Peter G3PLX
• Based on the RTTY mode of operation,
• Useful for live keyboard to keyboard QSO
• That works at 31.25 baud
• That uses varicode character coding what gives
  50 wpm
• That give very good copy under low Eb/No numbers
• Uses advanced DSP and narrow band (31 Hz)
  techniques

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PSK31?? ?????
ASK (Amplitude Shift Keying)
FSK (Frequency Shift Keying)
PSK (Phase Shift Keying)
0
1
1
0
1
0
1
0
0
0
1
0
1
1
0
1
1
OOK (On-Off Keying)
PSK
BPSK 180 ???
1
0
1
QPSK 90 ???
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PSK31?? ?????
PSK31 in BPSK mode.
PSK31 in QPSK mode.
00, 01, 10, 11 ? ?? 2bit ??? ?? ??
0? 1? ? ?? ??? ?? ??
BPSK? ???
QPSK? ???
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PSK31?? ?????
Baudot Code Table
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PSK31?? ?????
?? ???? ??? Baudot ??
Emile Baudot (1845-1905)
5-bit Baudot ??
Baudot ???, 1874
???
??? ????
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PTT module??
Sound card? ???? ??
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PTT module??
ACC??? ??!!!
ACC socket information 1 NC(No
connection) 2 GND(Connects to ground) 3
SEND(Input/output pin. Grounded when
transmitting. When grounded, transmits.) 4
MOD(Modulator input. Connecs to a modulator.) 5
AF(AF detector output) 6 SQLS(Squelchh
output. Grounded when qsuelch opens.) 7 13.8V
8 ALC(ALC votage input)
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????? ?? ? ????
????
DigiPan by Skip, KH6TY
DX4WIN by Steve, NR4M
MixW by Nick, UT2UZ
WinPSK by Moe, AE4JY
Software download http//www.qsl.net/wm2u/psk31.
html
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????? ?? ? ????
????
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Parts
??
????
?? ???
1N914 1N914A, 1N914B, 1N916A, 1N916B, 1N4148,
1N4448, LED? ??
4N25(4N29) ????? ?????(2N2222)? ????
1.2 kO ????
?? ?? ?? 1.2 kO - - - - - - - - - - - -
- - - - - - 1? ???? 1N4148 - - - - - - - - - - -
- - - - 1? ????? 4N25(4N29) - - - - - - - - - -
1? RS-232 ??? - - - - - - - - - - - - - - - - -
1? ???? - - - - - - - - - - - - - - - - - - -
- 1?
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??? ??
????? MIC gain? ?? ??? ??? ??
?? ???, ?? ??? ?? OFF
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?? ???
1.83815 MHz           3.58015 MHz 7.03515
MHz            10.14215 MHz 14.07015
MHz          18.10015 MHz 21.07015 MHz         
24.29215 MHz 28.12015 MHz          50.385 MHz
?? ? ??, ??? ?? ???? ?? ??? http//www.ac6v.com/c
allfreq.htm ??
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References
1 http//www.kasa.net 2 http//hl3ahq.karl.or
.kr ????? ?? 3 http//hl2kv.karl.or.kr 4
http//www.dx.or.kr PSK31?? 5
http//www.aintel.bi.ehu.es/psk31theory.html 6
http//www.qsl.net/wm2u/psk31.html 7
http//www.ehtec.com 8 http//www.ssiserver.com
/info/psk31/psk31.pdf 9 http//www.psk31.com
PSK offical homepage 10 http//www.geipelnet.co
m/barry/PSK31.ppt 11 http//psk31.com/G3PLXarti
cle.pdf
Thanks for your attention. If you have any a
question, send E-mail to ds5evu_at_bada.hhu.ac.kr -
HPE CU _at_ PSK31 mode!!!
This is DS5EVU, Kyeongwoo Im