Questions tagged [probe]
A physical device used to connect an electronic instrument (such as an oscilloscope) to a circuit in order to measure quantities such as voltage, current, temperature, etc. Use in conjunction with related tags such as "oscilloscope", "voltmeter", etc., as applicable.
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Tektronix P6015 Replacement Potentiometer Considerations
I’ve acquired (saved from the landfill) an old Tektronix high voltage probe, model P6015. The probe body and cable are in decent condition, but I discovered two damaged potentiometers in the ...
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Passive probe vs diffential probe
In the image:
Channel 1: Drain to source voltage
Channel 2: gate to source voltage
Channel 3: Switch current
Channel 4: Load current
The image shows Vds of low side MOSFET at turn on measured with a ...
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Circuit works only when oscilloscope probe is connected and does not work otherwise
I have built the circuit shown below.
The problem is that the circuit only works when I connect oscilloscope probes between node-A and the ground.
If I remove or decouple the probe-ground from the ...
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How to debug a STM32 MCU Discovery board at higher rates?
I have a STM32H735G-DK Discovery board, and can debug it with gdb (or vscode and cortex-debug). However, it is very slow - hitting s in gdb can take several ...
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Why are there (almost) no current shunt probes?
Most of the current probes for osciloscopes I can find are somehow magnetically coupled and have a high isolation and price.
However, in PCB design shunt resistors are often used.
Why does one not ...
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How to extract parasitic capacitance of an oscilloscope?
Can someone please explain the procedure to extract the parasitic capacitance of an oscilloscope? I have seen that the contribution of probe capacitance is 3.9 pF. The scope is a Tektronix 3 series ...
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Error measuring Vpp using my new Micsig oscilloscope
I have Micsig STO1104C oscilloscope. I was measuring Vpp and the generator was set at 1 V, but my Micsig said it was 1.3xx Vpp. So I measured it with my KEITHLEY DMM6500 and it was measuring 1 Vpp. So ...
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Guidance for making wide-bandwidth X1 scope measurements
I am making current measurements from a current-limited power supply. I'm currently using a 0.10 Ohm shunt with a X10 scope probe connected directly across the shunt. This connection uses the ...
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50 ohm D-dot probe measured with 50 ohm scope
I am attempting to measure the signal from a 50 ohm D-dot probe. The manufacturer says to use a 1M ohm scope but I only have a 50 ohm scope. How do I need to set up my tools correctly to receive an ...
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Build a high voltage probe to calibrate a 1.5 kV oscilloscope CRT supply voltage
I want to build a high voltage probe to calibrate my 1.5 kV oscilloscope CRT supply voltage.
Will just use this probe once to calibrate the scope so I don’t want to spend $200 on a probe and I mind ...
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Schematic diagram probe question
I am not sure whether to call it a probe on my schematic diagram or is it something else.
I have ATmega328P checking its two digital pins whether both have been connected to the ground. When floating,...
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Can I use a Buffer Amp to Isolate Probe Loading on my Circuit?
and thank you in advance for the hand-holding.
I was troubleshooting a very small and noisy signal in a circuit and the concern of probe loading came up...
I only have access to affordable passive ...
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PWM only works after touched with oscillicope probe
I am using two PWM outputs from a Netduino 2 to control two servos. One of the PWM pins works perfectly fine but the other doesn't work until I have touched it with an oscope probe. The probe doesn't ...
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How do construct a electrical resistance tomography apparatus
Im interested in constructing an electrical resistive tomography setup to image underground structures. While I somewhat understand the principle, I have found limited information on design and ...
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Why is my oscilloscope math mode showing an RMS voltage in gigavolts (unexpectedly high value)
I'm experiencing an issue with my Rigol DS1202 oscilloscope. When using the math function to measure the RMS voltage of the difference between two channels (A - B), the RMS value is displayed in ...
