Calculate coupling dimensions, transmitted torque, misalignment capacity, and stress. Use directional coupler calculator to find the coupling, coupling loss, insertion loss and directivity of a directional coupler by entering the desired input power, output power at output and isolated ports and coupled power. Please use the American standard for number formatting rather than the European standard (i.
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When powers are in linear units, the loss in decibels is: Attenuation (dB) = 10 × log10 (Pin / Pout) If the link length L is provided, the attenuation coefficient is: Coefficient (dB/km) = Attenuation (dB). An optical attenuator is a passive device that is used to reduce the power level of an optical signal. This article will tell you how to calculate the theoretical attenuation of optical cable and briefly explain the concept of signal-to-noise ratio. Optical Attenuation calculator uses Attenuation Per Unit Length = 10/ (Length Of Cable-Cut Length)*log10 (Photoreceiver Voltage At Cut Length/Photoreceiver Voltage At Full Length) to calculate the Attenuation Per Unit Length, Optical Attenuation per unit length is the rate at which light intensity.
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Alternatively, knowing the emitter current (Ie), Ic can be found using Ic = Ie - Ib. And it all depends on what information is already known about the transistor: Using Known Values If the base current, I b, and β are known, then Ic can be computed by the following formula: Using Known Values If the emitter. Notes: (1) The actual capacitance of a ceramic is less than the stated nominal value at a given dc voltage. simulate this circuit – Schematic created using CircuitLab Here is the question: In this circuit, the transistor has a gain of 80 and a voltage Vce (sat) of 0. npn devices are most prevalent in both ICs and discrete component circuits which employ BJTs. Learn more #bjtnumerials #bjt #npn #analog This video explains about the determining the below parameters of bjt.
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This tool estimates tray self-weight from material density and an approximate metal volume. For solid and perforated trays, it treats the tray as a formed sheet: Developed sheet width per meter: Dev = W + 2H + 2R Metal volume per meter: V = Dev × t × 1 × (1 − Open%). In this guide, we'll walk you through the step-by-step process for calculating cable tray weight, while providing examples for both channel trays and ladder trays. How to calculate cable tray bends? Calculate the minimum required bend radius by multiplying the cable's outside diameter by its bending factor (e. For actual engineering practice, apply cable spacing, tray fill factors, and weight limits. The International Electrotechnical Commission (IEC) outlines clear guidelines in IEC 61537 for determining the appropriate tray or ladder based on mechanical strength, ventilation, electrical continuity, and.
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The size of the plenum box can be determined by calculating the cross-sectional area, and then multiplying that figure by the required air flow. The selection graph below will help determine the size of the fan required for your application. air) from one place to another for extraction, air-conditioning, compression, etc. One of the most important considerations when sizing a plenum box for HVAC is the air flow required. Bernoulli's equation in its simple form shows that, for an elemental flow stream, the difference in total pressures between any two points in a duct is equal to the pressure loss between these points, or:.
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