== == In diagnostic ultrasound axial resolution is influenced by a number of factors including transmission pulse length and frequency of the probe. For best axial resolution short pulses are used - long pulses can potentially improve the signal to noise ratio but their use often results in "range side lobes", effectively a reduction in axial resolution.
Pulse repetition frequency (PRF) is a separate issue to axial resolution however high frequency probes are able to have a higher PRF (resulting in higher frame rates) than low frequency probes due to the higher rate of absorption of the higher frequency signals.
A pulsed laser is used in many different situations from hair removal to surgery. The frequency and wavelength of the pulse determines the suitability of the laser for each type of use.
NO; frequency is the number of cycles per second or micro second. Pulse is the number of pulses per second in a pulsed Radar
Fuel injector is energize by signal composed of pulsed voltage frequency increases as with rpm set by pcm
Imagine a tuned cavity i.e. a bell. When it is struck, it provides a sound wave of fixed frequency. If it is struck several times a second, it provides the same frequency at a much higher volume. The striking of the bell is known as the pulse repetition frequency (PRF) and it is this that dictates the power output of a magnetron. The dimensions of the cavities govern the output frequency. Instead of striking a magnetron, it is pulsed across its anode and cathode by a high DC voltage. This is the energy input that equates to the striking of the bell. The gap between the cathode and anode is a vacuum. Electrons being emitted by the heated cathode each time it is pulsed or 'struck' transfer the energy to the cavities. These electrons bunch in reaction to the tuned frequency of the cavities, forming spokes circulating the cathode. Eventually, the electrons strike the anode and cause the cavities to 'ring' at the tuned frequency. One of the cavities has a loop that extracts the energy into a coax/waveguide.
(shiwwasuji@gmail.com)Duty Cycle DC is the ratio of pulse duration to the pulse repetition time periodDuty Cycle DC = pulse duration (t)/pulse repetition time period (T)Pulse Duration (t) = 0.008 x 2.5 ms
Yes, a traveling wave tube or TWT is a pulsed device.
notes about pulsed Doppler radar FM altimeter
pulsed is like a beating heart while digital is your face
A harmonic wave of certain length and amplitude. The wave could be sinusoidal, disturbed of Fourier structure, pulsed of high amplitude and short wave length, of even or odd harmonics, or amixture of constant and variable amplitude.
Radar receivers have to be tuned to the precise frequency of the transmitter, in order to get the best detection and thus the best picture. The transmitter generates microwaves from a device called a magnetron. The exact frequency can vary with age and temperature. To pick up the echo generated from the pulsed microwave, the receiver is able to be tuned, to allow for differences in transmitter frequency. The control on the radar receiver display, called 'tuning', actually alters the receiver frequency, not the transmitter frequency.
A continuous laser produces a constant wave. A pulsed laser's wave is intermittent.
It varies form manufacturer to manufacturer. Besides, most TV remote controls work on infrared light signals, pulsed at a specific rate to match the programmed processor in your TV.