Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [bnc]

A BNC (Bayonet Neill–Concelman) connector is a type of coaxial connector commonly used on test equipment and in other applications up to around 3-4 GHz and sometimes at higher frequencies. The most common impedance is 50 ohms but 75 ohm variants are also available.

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What is the purpose of oscilloscope-probe-to-BNC adapters?

What are these adapters used for? (Image off Google, source) They fit over the tip of a passive oscilloscope probe, like this: (Image excerpted from https://www.caltestelectronics.com/public/attachments/GE_series_manual.pdf].) Why would you want…
polwel
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What type of Connector is this?

The connector on the left is a standard BNC, but could someone please tell me what the connector on the right is?
Tim M
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Is there anything particularly special about a "short" and an "open" in a VNA calibration kit?

I would like to calibrate a VNA with the reference plane at the end of a male BNC feedline. Surprisingly, female SOL kits are hard to find. There are many BNC 50-ohm loads available but I'm having trouble finding a BNC open and a BNC…
KJ7LNW
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Are there any differences between clamp, twist-on, and crimp coax connectors outside of cost and ease of assembly?

I have recently started working with software-defined radio, and have replaced some connectors on RG-58 coax in preference to using multiple adapters. RG-58 BNC connectors seem to come in three flavours: Clamp (example on Farnell) Crimp (example on…
Cybergibbons
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Advice on BNC cables for beginners electronic lab

I'm setting up an electronics lab so I can increase my knowledge of electronics. I've bought some equipment of ebay ('scope, power supply, signal generator etc.,) but don't know what sort of BNC cables I should get. Do I need to worry about…
Keith Miller
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Why is there such a huge price range for BNC terminators?

I wanted to buy some standard BNC 50 Ohm terminators and was surprised when I saw multiple offers with prices well above 20€ per piece. I found others for around 2€ (same online shop) and now I am intrigued on why the expensive ones are more…
mad
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How do I properly clean oscilloscope BNC connectors?

Over time with use BNC connectors on test equipment will attract contaminants . Since BNC is usually used for relatively high frequencies, I suspect that contaminants will have negatively affect performance of the system. I also suspect that type…
AndrejaKo
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How to choose the impedance of a BNC adapter?

I am trying to set up lab equipment to measure my soon-to-come sample, but I couldn't get my mind around one thing, impedance termination. I will tell you what I have, what I want to get, and my concerns. My probes are already connected to coaxial…
himura
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Terminating unused SDI/BNC input

I use the Magewell Eco Capture Quad SDI M.2 (a small form factor quad-channel) capture device which keeps overheating after a few minutes (up to 100 C). I've read that this might be due to cameras not being connected and SDI inputs unused. Since I…
Random
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Splitting CB Radio Mic Inputs?

I just purchased my first CB radio and I am looking to split the microphone's output such that it can go to two outputs (the radio itself and custom electronics I plan to design). I'm using the Uniden PRO505XL and the microphone jack seems to have…
jimBeaux27
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BNC Cables and their impedances

V1=10 V(peak to peak), frequency of voltage source = 1kHz, D1 is a standard 1N4007 Silicon Diode, R1=10 kilo ohm (the load resistor) In our electrical lab, we were given the circuit shown in the diagram. I haven't been able to perform this lab due…
panda4khz
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Where can I find the symbol of BNC in LTspice?

I am working with LTspice and I need to put a BNC at the input of my amplifier. Where can I find this symbol?
Chài Mà
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How does this impedance matching circuit work? How to simulate it correctly in SPICE?

I have a schematic for a current sensing circuit using a dedicated TI differential amplifier part for current sensing applications. The schematic also includes an "impedance matching" part for connecting the voltage output of the differential…
genericpurpleturtle
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Would it be ok if I try to measure an audio signal using a 15m BNC Cable?

I would need to use a 15 meters BNC Cable (RG58) in order to measure an audio signal that goes directly to a pair of earbuds. This means, the test point would be exactly before the balanced armature speaker located in the earpiece. The idea is that…
the_moon
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What's the right way to connect two exposed pins from a board to BNC?

For an ADC evaluation board like this one, where signals go in through exposed pins, I'd like to have the signals come from a BNC cable (or SMA). However, I'm concerned about noise. What's the right way to do this connection? There doesn't seem to…
The Quantum Physicist
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