WSPR

Related wiki pages Repeater listings, APRS, D-Star, Echolink, IRLP, Packet, Slow-Scan Television (SSTV), Fast-Scan Television (ATV), Optical communications, Software

WSPR Weak Signal Propagation Reporter

WSPR (usually pronounced "whisper") is a software application that uses the transmission mode MEPT-JT (Manned Experimental Propagation Transmitter - Joe Taylor).

In MEPT transmissions, the radio becomes a beacon that transmits for just under 2 minutes, transmitting callsign, locator and power information. Modulation is by narrow band FSK.

Frequencies in use for WSPR

Band	Dial freq (MHz)	Tx freq (MHz)
160m	1.836600	1.838000 - 1.838200
80m	3.592600	3.594000 - 3.594200
60m	5.287200	5.288600 - 5.288800
40m	7.038600	7.040000 - 7.040200
30m	10.138700	10.140100 - 10.140300
20m	14.095600	14.097000 - 14.097200
17m	18.104600	18.106000 - 18.106200
15m	21.094600	21.096000 - 21.096200
12m	24.924600	24.926000 - 24.926200
10m	28.124600	28.126000 - 28.126200
6m	50.293000	50.294400 - 50.294600
2m	144.488500	144.489900 - 144.490100

WSPR interface

The WSPR interface has three main panes:

• Top left - the activity pane which is divided into vertical strips each representing a time of 2 minutes. In the example below, transmits are shown as green vertical lines.
• Top Tight - the active stations pane which shows which stations have been received.
• Bottom Right - received station details, showing the receive parameters of active stations.

External links

• WSJT home page

• G4ILO a good intro to WSPR.

• WSPRnet.org A great forum for information, chat and spots.

• wspr_mept yahoo user group for WSPR