QCX assembly Rev 1.08
91
Therefore, ensure that for WPSR transmissions, you choose a frequency in one of the WSPR sub-
bands according to the following table:
80m:
3.594000
– 3.594200
60m:
5.288600
– 5.288800
40m:
7.040000
– 7.040200
30m:
10.140100
– 10.140300
20m:
14.097000
– 14.097200
17m:
18.106000
– 18.106200
15m:
21.096000
– 21.096200
12m:
24.926000
– 24.926200
10m:
28.126000
– 28.126200
6.4 Frame
10
This parameter defines the repetition rate of the WSPR transmission. In the example shown here,
Frame 10, this means that the WSPR message will be transmitted once every 10 minutes.
Transmission in every 2 minute WSPR slot is considered anti-social. 10 minute repeat
transmissions is usually considered normal.
6.5 Start
04
If everybody transmits with 10 minute repetition rate starting on the hour, then there will be bursts
of activity every 10 minutes where everyone is transmitting at once, and the potential for
interference from another station will be large. To avoid this, you can define the start timer. In this
example a start time of 04 means that the first transmission will start at 4 minutes past the hour,
and subsequent transmissions will commence at Frame minutes after that
– in this case, 14, 24,
34 etc minutes past the hour.
6.6 WSPR call
G0UPL
The WSPR callsign is the first parameter which is encoded into the WSPR message. Your callsign
must obey certain restrictions imposed by the WSPR protocol. These restrictions helps ensure that
the WSPR encoding process can compress callsigns efficiently, along with the Maidenhead
Locator square and Power level, into only 50 binary bits of information in total.
Summary of Contents for QCX 5W CW
Page 9: ...QCX assembly Rev 1 08 9...
Page 10: ...QCX assembly Rev 1 08 10...
Page 12: ...QCX assembly Rev 1 08 12...
Page 50: ...QCX assembly Rev 1 08 50...
Page 105: ...QCX assembly Rev 1 08 105...
