MFJ MFJ-464 - Tone; Figure 7: Keying Delay and PTT Hang Time Timing; Figure 8: Rise Time and Decay Time Timing

MFJ-464 Instruction Manual CW Keyer/Reader
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PTT Hang TimeKeying Delay
PTT Output
Keying Output
Sidetone Audio
Figure 7: Keying Delay and PTT Hang Time Timing.
Tone
The Tone menu allows you to set the audio frequency in the range of 305 to 1006 Hz. The MFJ-
464 features smooth, clean audio, with sine wave output, instead of the harsh square wave audio
used by many other keyers. Also, the MFJ-464 produces each dit and dah with a rise and decay
time of approximately 5 milliseconds, avoiding the "spikes" that cause distracting key clicks.
The MFJ-464's audio sounds like that of a good CW transceiver.
Keying Output
Sidetone Audio
Rise Time Decay Time
Figure 8: Rise Time and Decay Time Timing.