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AQ7270 Series OTDR Operation Guide User’s Manual
AQ7270 Series OTDR Operation Guide User’s Manual

... or more, stop charging the battery pack immediately. Because the electrolyte solution inside the battery pack is alkaline, harm can be done to the clothes or skin, if the battery pack leaks or explodes and the solution comes in contact. If the electrolyte solution enters the eye, it can cause blindn ...
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... The short-term frequency instability can be expressed in a number of different ways. The method of expressing the instability is likely to depend upon the intended application, as well as the performance of the signal source, and in many cases a source may be characterised in more than one way. Whil ...
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... impedance of capacitors and inductors. Consider a voltage divider where the shunt leg is a reactive impedance. As the frequency is changed, the value of the reactive impedance changes, and the voltage divider ratio changes. This mechanism yields the frequency dependent change in the input/output tra ...
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... At zero slip, the generator angle will not rotate into phase with the power system and a close cannot occur. When GF > BF is not enabled, zero slip is inside the control dead band, and no correction pulses will be sent to the governor to change the slip rate off of zero. Figure 4 shows that the prop ...
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TLN-712 User Guide 2.0 - The Tellun Corporation

... (logic zero). As the AUX input signal goes above +0.65V the output from U22a goes high (logic one). This can be used to create a cross product effect by feeding in a second oscillator, or to cascade two TLN-712s together, or to add another level of animation. A triangle or sine waveform works best f ...
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Chirp compression



The chirp pulse compression process transforms a long duration frequency-coded pulse into a narrow pulse of greatly increased amplitude. It is a technique used in radar and sonar systems because it is a method whereby a narrow pulse with high peak power can be derived from a long duration pulse with low peak power. Furthermore, the process offers good range resolution because the half-power beam width of the compressed pulse is consistent with the system bandwidth.The basics of the method for radar applications were developed in the late 1940s and early 1950s, but it was not until 1960, following declassification of the subject matter, that a detailed article on the topic appeared the public domain. Thereafter, the number of published articles grew quickly, as demonstrated by the comprehensive selection of papers to be found in a compilation by Barton.Briefly, the basic pulse compression properties can be related as follows. For a chirp waveform that sweeps over a frequency range F1 to F2 in a time period T, the nominal bandwidth of the pulse is B, where B = F2 – F1, and the pulse has a time-bandwidth product of T×B . Following pulse compression, a narrow pulse of duration τ is obtained, where τ ≈ 1/B, together with a peak voltage amplification of √(T×B).
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