The solutions used simple modulation techniques like amplitude-shift keying (ASK) or frequency-shift keying
Smartphones, microfluidics, low-power devices, 1-way valves, optical sensing, multiplexed assays, frequency-shift keying
, and lyophilization are not new technologies.
Therefore, if the resonant frequency of the antenna is switched at a high rate, a fast frequency-shift keying
(FSK) modulation can be directly realized.
Data could only be sent at a very slow rate using techniques such as Frequency-shift Keying
Similarly, frequency-shift keying
(FSK) transmits a "one" on one frequency and a "zero" on another frequency.
The MSK modulation format is a special case of binary frequency-shift keying
(FSK) in which the selected modulation index is h = 0.5, which is the value that forces a phase change of [pm][pi]/2 on each bit interval.
When using frequency-shift keying
, there are two limitations.
Aktakom AWG-4151 universal generator can work not only with harmonic signals, but also has modulation opportunities and other special modes including: amplitude modulation (AM), frequency modulation (FM), phase modulation (FM), frequency-shift keying
(FSK), and also operation in pulse width modulation (PWM), sweep mode, frequency and pulse bursts.
With the addition of only a few other peripheral components, the two ICs can be integrated to form a small, cost-effective transceiver capable of transmitting and receiving FM or frequency-shift keying
(FSK) signals in the 860 to 965 MHz frequency range with input data rates up to 500 kbps.
The basic possibilities are amplitude-shift keying (ASKe, phase-shift keying (PSK) and frequency-shift keying