two-tone modulation

two-tone modulation

[′tü ¦tōn ‚mäj·ə′lā·shən]
(communications)
In teletypewriter operation, a method of modulation in which two different carrier frequencies are employed for the two signaling conditions; the transition from one frequency to the other is abrupt, with resultant phase discontinuities.
References in periodicals archive ?
In recent years, there are some new research results about signal injection including the improvement of the fundamental signal power of TWT by harmonic injection [4, 12], the harmonic and intermodulation distortions associated with two-tone modulation [13], the suppression of IMD3 by harmonic injection [14], and the particle swarm optimization algorithm (PSO) which are applied to suppress IMD [15,16].
Ahmed, "Harmonic and intermodulation distortions and noise associated with two-tone modulation of high-speed semiconductor lasers," Physics of Wave Phenomena, vol.
Such two-tone modulation is important for several applications, such as multichannel RF-frequency division multiplexed transmission of analog or microwave signals [37].
In Section 4, we present the simulated IM and FM responses and noise characteristics under single- and two-tone modulations. Finally, the present work is concluded in Section 5.
A creepy carousel, first met in darkness, it periodically lights up and revolves, the bulbs on its ogee arches flashing in varying sequences, an automated drum kit that rides it beating time for the broadcast of a wheezy two-tone modulation on what sounds like the traditional carnival harmonium.
In Figure 4, the Cartesian loop deals with two-tone modulation very effectively.
In contrast to the large peak-to-average values characteristic of two-tone modulation and more complex signals, CW signals encompass phase, frequency, or amplitude-modulated carriers.
The input is of a two-tone modulation with the following specifications: K[Alpha] = -0.1 adaptation rate and K[Beta] = -0.01 adaptation rate.