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WSPR reference numbers for 2-minute WSPR (WSPR-2)

WSPR operational frequencies

• Passband width: 200 Hz

Band	Dial [MHz]	Low [MHz]	High [MHz]
2200m	0.1360	0.1374	0.1376
630m	0.4742	0.4756	0.4758
160m	1.8366	1.8380	1.8382
80m	3.5926	3.5940	3.5942
40m	7.0386	7.0400	7.0402
30m	10.1387	10.1401	10.1403
20m	14.0956	14.0970	14.0972
17m	18.1046	18.1060	18.1062
15m	21.0946	21.0960	21.0962
12m	24.9246	24.9260	24.9262
10m	28.1246	28.1260	28.1262
6m	50.2930	50.2944	50.2946
2m	144.4890	144.4904	144.4906

WSPR-2 timing and channel spacing

• The channel symbol output corresponds to lowest to highest frequencies, from 0 to 3, with 1.46484375 (= 12000/8192) Hz frequency shift, respectively.
• The channel spacing list of the offset from the center frequency:
  • Symbol 0: -2.197265625 Hz ( = -18000/8192 Hz)
  • Symbol 1: -0.732421875 Hz ( = -6000/8192 Hz)
  • Symbol 2: +0.732421875 Hz ( = +6000/8192 Hz)
  • Symbol 3: +2.197265625 Hz ( = +18000/8192 Hz)
• Transmission rate: 1.46484375 baud = 0.682666667 second/symbol = 8192/12000 second
• Each transmission contains 162 symbols for 110.592 seconds
• Each transmission starts +1 second after even UTC minute (e.g., 00:01, 02:01)

References

• VK6YSF: WSPR Operational Frequencies
• WSPRnet
• wspr-cui
• wspr.rocks