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Output selection, processing and routing
The AM output has an adjustable low-pass filter to comply with NRSC or ITU-R standards,
tilt equalization to compensate for a non-DC path in the transmitter and a tone
generator to facilitate set-up and alignment.
A quiet word about the final peak limiting stage:
This stage employs distortion controlled clippers to limit the peaks of the signal. Distortion
controlled clipping is the best method for preserving as much high frequency energy as
possible, important when the high frequency loss characteristics of the AM broadcast
receivers is taken into account.
Distortion controlled clipping produces harmonic distortion which if used moderately
can produce a sizzling bright sound but can result in a ripping or tearing sound if used
excessively – so be careful!
