Real Morse code options

This set of options allows you to simulate a variety of conditions frequently encountered when listening to code on the amateur bands. Here is how the controls work:

Fade depth controls the amount of fading. Long distance signals often vary in signal strength as ionospheric and tropospheric changes occur. Select values near min. for small variations or no fading at all. Settings near max allow the signal to occasionally fade so much that it is inaudible.

Background noise level. This controls the amount of broadband noise present in the received audio. This noise originates both in the front-end components of the receiver and the atmosphere. The contribution from each source varies depending on frequency. In NuMorse Pro you can vary the noise from zero to a level which renders the signal inaudible.

Add impulsive noise. Impulsive noise can be generated by electrical machinery and also by electrical storms. This noise is characterized by sharp pulses at irregular intervals. Most amateur radio receivers have circuitry to reduce the effects of impulsive noise.

Add ignition noise. Ignition noise pulses occur at regular intervals, they are generated by vehicle and other petrol engines. The effect can be reduced by noise blanking circuits in the receiver.

Play real Morse Code. This is a master switch that enables/disables all of the noise functions.