"' Spectral regrowth "'is a general term used to describe intermodulation products generated in the presence of a digital transmitter added to an analog communication system.
12.
When driven by two sinusoidal waveforms, it is theoretical power level at which the power of the desired tone and the nth-order ( where n is odd ) intermodulation product intersect.
13.
It also contains terms at the original frequencies and at multiples of the original frequencies,,,, etc .; the latter are called harmonics, as well as more complicated terms at frequencies of, called intermodulation products.
14.
However, on 18 May 1983 officials from the intermodulation products resulting from co-located transmitters for Radio Nova and its sister station Kiss FM had caused interference to emergency services'frequencies around 74 MHz for a period in the previous month.
15.
The difference between the two sound carriers is 15.5 times the line frequency ( 15.5 x 15625 Hz = 242187.5 Hz ) which, being an odd multiple of half line frequency, reduces the visibility of intermodulation products between the two carriers.
16.
However, while the intermodulation products of the received signal with the local oscillator signal are intended, superheterodyne mixers can, at the same time, also produce unwanted intermodulation effects from strong signals near in frequency to the desired signal that fall within the passband of the receiver.
17.
Notch filter to suppress the intermodulation products is used at the output of the intercarrier transmitter, the cost of the notch filter is not comparable to the cost of extra amplifiers and the output combiner . ( See the subsection "'Intermodulation products "'below)
18.
Notch filter to suppress the intermodulation products is used at the output of the intercarrier transmitter, the cost of the notch filter is not comparable to the cost of extra amplifiers and the output combiner . ( See the subsection "'Intermodulation products "'below)
19.
This adjustment ensures that the sums and differences of the sound carrier and the color subcarrier and their multiples ( i . e ., the intermodulation products of the two carriers ) are not exact multiples of the frame rate, which is the necessary condition for the dots to remain stationary on the screen, making them most noticeable.
