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Two-tone receiver testing using direct injection [8] Two-tone receiver testing using off-air method [9] A test setup suitable for testing receivers at microwave frequencies is shown in the figure. The two signal generators, F1 and F2, are combined using a directional coupler in reverse.
15 sinewave tones, all but the last 0.127 seconds in length with 0.023 seconds of silence between tones, of the following estimated frequencies: 50, 100, 250, 400, 640, 1010, 1610, 4000, 6350, 8100, 10100, 12600, 15200, and 18300 Hz, followed by 130 ms of silence, then 820 ms of a 15200 Hz tone. [4] (Used by EMI Canada in 1982, as SDR.)
NPA+102 – Plant Test – Milliwatt tone (1004 Hz) NPA+103 – Plant Test – Signaling test termination; NPA+104 – Plant Test – 2-way transmission and noise test; NPA+105 – Plant Test – Automatic Transmission Measuring System; NPA+106 – Plant Test – CCSA loop transmission test; NPA+107 – Plant Test – Par meter generator
In telecommunication, a standard test tone is a pure tone with a standardized level generally used for level alignment of single links and of links in tandem. [1]For standardized test signal levels and frequencies, see MIL-STD-188-100 for United States Department of Defense (DOD) use, and the Code of Federal Regulations Title 47, part 68 for other Government agencies.
In electrical engineering, a function generator is usually a piece of electronic test equipment or software used to generate different types of electrical waveforms over a wide range of frequencies. Some of the most common waveforms produced by the function generator are the sine wave , square wave , triangular wave and sawtooth shapes .
A programmable sound generator (PSG) is a sound chip that generates (or synthesizes) audio wave signals built from one or more basic waveforms, and often some kind of noise. PSGs use a relatively simple method of creating sound compared to other methods such as frequency modulation synthesis or pulse-code modulation .
Schematic diagram of additive synthesis. The inputs to the oscillators are frequencies and amplitudes .. Harmonic additive synthesis is closely related to the concept of a Fourier series which is a way of expressing a periodic function as the sum of sinusoidal functions with frequencies equal to integer multiples of a common fundamental frequency.
This page was last edited on 1 October 2011, at 16:14 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may ...
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