Coherent CW
From Signal Identification Wiki
Coherent CWContinuous Wave | Coherent BPSK
 | |
|---|---|
| Frequencies | 3 MHz,30 MHz |
| Frequency Range | 3 MHz - 30 MHz |
| Mode | USB |
| Modulation | OOK |
| ACF | — |
| Emission Designator | — |
| Bandwidth | 1 Hz |
| Location | Worldwide |
| Short Description | Coherent CW (also known as CCW) was a strictly timed morse code mode designed by Ray Petit W7GHM (The same inventor of CLOVER). CCW depended on accurate timing from both receiver and transmitter. |
| I/Q Raw Recording | — |
| Audio Sample | |
Coherent CWContinuous Wave (also known as CCW) was a strictly timed morse code mode designed by Ray Petit W7GHM (The same inventor of CLOVER). CCW depended on accurate timing from both receiver and transmitter.
Characteristics[edit]
CCW ran at exactly 12 words per minute, with 100ms for dot length and element space and 300ms for dash length and character space. CCW, using a synchronous clock rate, allows for users to take advantage of extremely narrowband filtering what increases the SNR and allows for reception in poor propagation conditions at the expense of very slow transmission. It is technically very simple (OOKOn-Off Keying Modulation) and is easily implemented.
Samples[edit]
Frequencies[edit]
Used on Amateur Radio HFHigh Frequency (3-30 MHz) bands.
Decoding Software[edit]
- Hobby Level Software
- *Both COHERENT and AFRICA are 16-bit DOS applications*
- COHERENT and AFRICA, ve2iq interface (16-bit DOS applications)
- Precision CW for CCW, 16-bit DOS applications, PC sound interface
Video Examples[edit]
Additional Links[edit]
- CCW NOTES By Peter Lumb G3IRM
- Coherent CW: Amateur Radio's New State Of The Art?
- The CCW Archives: Coherent CW
- Coherent CW: Some Theory by Schroeder DJ7HS
- ARRL Weak Signal Modes: Coherent CW
