2014年2月10日 · That is "the RF bandwidth of a typical CW signal." The minimum bandwidth is often assumed to be something like 25 Hz, but with appropriate frequency stability one would …

A CW signal is approximately at a single frequency (with only the additional bandwidth required to allow the key-up and key-down transitions). However, the standard method of receiving a CW …

2017年10月25日 · CW transmitters always begin at zero output (what you are calling a zero-crossing, but at the boundary condition) until they are commanded to produce a signal by the …

2021年11月6日 · One significant advantage (probably the biggest one) of transmitting Morse as an AM tone rather than a simple carrier on-off is that the simplest radio receivers (crystal sets …

2020年5月30日 · Such a CW mode would allow humans to enjoy the fun of copying CW and would allow a computer-assist in pulling the signal out of the noise. It is sort of true that "state …

2020年1月7日 · How is the signal-to-noise ratio for received CW and QRSS CW (and/or other ultra narrow-band DSP digital modes) typically computed? e.g. What noise bandwidth should …

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2014年2月12日 · How much does the rise time or bandwidth of a CW signal need to be limited to prevent other QSOs on adjacent frequencies from being annoyed by "key clicks"? One can …

2003年1月28日 · If these same radios immediately turned on the output stages, and held them on for several mS after the key line was opened, they could send perfect filtered CW through the …