In a standard PLL synthesizer the value of N, by which the output frequency is divided in order to compare it with the reference frequency, must always be an integer. In this type of synthesizer the resolution (step size) is equal to the reference.
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Portable and benchtop models are not necessarily for held-in-hand use, but have case / handles, etc. These devices can be moved relatively easily for multipurpose uses.
Rack or card mounted synthesizers are PCB that has no integral display or interface and must be interfaced with a computer for use. They typically plug into a backplane or motherboard, or otherwise interfaces directly with a computer bus.
In through hole technology (THT), components are mounted on printed circuit boards by inserting component leads through holes in the board and then soldering.
Waveguide components are circular, elliptical or rectangular metal tubes or pipes through which electromagnetic waves are propagated in microwave and RF communications.
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Phase noise is the short term random fluctuations of the phase of a signal. Phase noise is particularly important in oscillators because this value is directly related to the frequency stability of the output signal. Phase noise is measured (in dBc/Hz) at different offset frequencies from the carrier frequency. Typically, phase noise is measured at offset frequencies of 1 kHz or 10 kHz, from the carrier frequency.
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This is the full-required range of ambient operating temperature.
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Frequency range is the output range of frequencies that the synthesizer can accomplish.
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Restriction of Hazardous Substances (RoHS) is a European Union (EU) directive that requires all manufacturers of electronic and electrical equipment sold in Europe to demonstrate that their products contain only minimal levels of the following hazardous substances: lead, mercury, cadmium, hexavalent chromium, polybrominated, and biphenyl and polybrominated diphenyl ether. RoHS became effective on July 1, 2006.
“The Waste Electrical and Electronics Equipment Regulations (WEEE Regulations) is a European Parliament Directive with the aim of encouraging reuse, recycling and recovery of electrical and electronic equipment, and to improve the environmental impact and performance of these equipments. This directive sets the requirements and criteria for the collection, treatment, recycling and recovery of these equipments. It makes producers responsible for financing these activities, and retailers and distributors must provide means for consumers to return used or obsolete equipments without charge.
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