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Questions tagged [attenuation]

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0answers
19 views

I don't know why my attenuation setting changed

I have a question about the change in my attenuation setting. I have a spectrum analyzer. In one measurement the main harmonic is measured to be 342.28 mV and its reference level is 355 mV. The ...
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1answer
39 views

How to calculate cutoff freqeuncy of Bandpass filter, given an attenuation dB level (OTHER THAN -3DB)

I know that -3dB is the accepted standard, where the power of the signal is at 50%, and that upper and lower cutoff frequencies are calculated with regards to this value, and there are simple formulas ...
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0answers
21 views

Attenuation factor

In A.C. Circuits if R=2k ohm and c=2 micro farad what is the frequency at which the attenuation factor A drops by 20% of its maximum value? In the attached picture my attempted to solve the question . ...
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2answers
126 views

Purpose of attenuation before op-amp input

What is the purpose of putting attenuation circuit before op-amp input? I cant find the actual reason for this topology. Is there any reason behind it? Why we need to attenuate the incoming signal but ...
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0answers
25 views

Signal Attenuation TVS and series resistor

This question is in regards to signal attenuation on high speed data lines like RS-485 (and any others as well). I'm new to the signal world, so please bear with me here. Are there some useful ...
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2answers
77 views

Effect of wall location for guided wave attenuation

Pardon my ignorance here if this has already been answered. I'm not fully familiar with the English terminology here so my searches came up empty. If there is any keyword I’m missing or I’m not using ...
0
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1answer
29 views

LTSpice transient analysis and current amplification problem

Im simulating LC circuit in LTSpice: It's tuned at resonance at 1 MHz in the transient response simulation plotting the source and R1 current. Both of which are equal in amplitude 600mA but with a ...
0
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1answer
45 views

How to interpret the vertical axis of this attenuation plot?

How can I interpret the following curve for this toroidal ferrite? It shows the attenuation vs frequency. But the vertical axis is not dB, it is impedance in Ohm. This is unusual for me. How can I ...
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5answers
2k views

Running baseband analog audio signal over cat 5 cable [closed]

What will happen to a single ended (not differential) 1Vpp analog audio signal(4khz bandwidth, not modulated) if it runs through long cat5 cable (length can be 50 meters)? How much signal voltage can ...
0
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1answer
32 views

Difference two attenuation constant

When finding parameters for electromagnetic waves and transmission lines, we can find various characteristics including attenuation and characteristic impedance. \$\alpha\$ is attenuation constant. 1-...
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1answer
136 views

Best way to attenuate R2R DAC output?

Given an N-bit R2R DAC, with input voltages of e.g. 0-3.3 volts, what is the the best way (signal integrity and quality maintained) to attenuate its output voltage to a range e.g. 0-.7 volts for a VGA ...
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1answer
88 views

What is rapid signal attenuation?

Attenuation describes the weakening of the signal as it travels from the transmitter to the receiver. However, this textbook describes a concept called "rapid signal attenuation" as a way to allow ...
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1answer
904 views

Why is an oscilloscope's Attenuation switch placed on the probe?

I'm wondering why an oscilloscope's Attenuation switch is placed on the probe not on the oscilloscope's body (like the AC/DC Coupling switch that's placed on the scope body not on the probe)?