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Essentially you have to make a device that doesn't load down the circuit being tested and adapts to the input configuration of your oscilloscope.
Start with a suitable length of coaxial cable with a BNC connector attached to one end.
In order to present a high-impedance to the probe tip and simultaneously scaling the sensitivity of the 'scopes input, you will need to construct a voltage divider circuit at the other end of the coax. This voltage divider circuit could be for instance a 5 mega ohm resistor in series with the core of the coax and a probe tip along with a 1 meg resistor in parallel with the coax conductors. That is, across the shield to the center conductor.
A suitable non-conductive handle is used to house the voltage divider, which has the other end of the 5 meg resistor attached to a pointed object of some type that extends from the end of the probe handle. A short length of wire with an alligator clip attached to the end is then soldered to an exposed section of coax shield thus forming the ground reference for the probe.
A suitable housing for the probe could be a plastic writing pen that has been gutted for this purpose.
A web site that shows this operation can be found at
http://www.cromwell-intl.com/radio/probes.html
where I found this clever ascii artwork that explains what is described above:
R1
5 Mohm ----------------------
test <----/\/\/\/\----+-----------(o) )--- scope input
point | +--------------------+ ~ 1 Mohm
| | 50-75 ohm | 10-20 pF
+--/\/\/\/\-- + cable |
1.25 Mohm | |
R2 | |
----- -----
--- ---
- -
\__________________________/ \______________/ \_____________/
| | |
Probe Cable Oscilloscope
What else can I help you with?
What is oscilloscope probe compensation?
Oscilloscope probe compensation is the process of adjusting the probe to match the input capacitance of the oscilloscope, ensuring accurate waveform measurements. This is done by using a compensation signal to adjust the probe's circuitry for optimal signal fidelity. Proper probe compensation is essential for obtaining accurate and reliable measurements with an oscilloscope.
How can you maesure using oscilloscopes?
To measure using an oscilloscope, connect the oscilloscope probe to the signal source. Adjust the time and voltage scales on the oscilloscope to properly display the waveform. Use the cursors and measurements feature on the oscilloscope to measure parameters like frequency, amplitude, rise time, and pulse width.
What is the abbreviation for oscilloscope?
We can write oscilloscope as o'scope, or just call it a scope as a lot of electronics types do.
What does an oscilloscope display?
An oscilloscope displays a graphical representation of electrical signals as voltage over time. It shows the waveform, amplitude, frequency, and other characteristics of the input signal. This allows users to visually analyze and troubleshoot electronic circuits.
Who invented the oscilloscope?
Karl Ferdinand Braun invented the Oscilloscope in 1897
What is the resistance of an ideal oscilloscope probe?
The resistance of an ideal oscilloscope probe is infinity.
What is oscilloscope probe compensation?
Oscilloscope probe compensation is the process of adjusting the probe to match the input capacitance of the oscilloscope, ensuring accurate waveform measurements. This is done by using a compensation signal to adjust the probe's circuitry for optimal signal fidelity. Proper probe compensation is essential for obtaining accurate and reliable measurements with an oscilloscope.
How do I get repairs done on my oscilloscope probe?
You can get information on how to do repairs on your oscilloscope probe online. One such website is http://www.radio-electronics.com/info/t_and_m/oscilloscope/oscilloscope_probes.php. The oscilloscope probe is mechanical part of scope. It does not have any electronic circuit. It is better to contact manufacturer for repairs of your probe. In all probabilities you will need replacement than repair as lenses, and fiber-optic cables do not get repaired.
Why current cannot be measured directly using an oscilloscope?
A standard oscilloscope is designed to measure voltage, you need a current probe for your oscilloscope to measure current.
What will happen to DC signal if positive probe connected to negative terminal and negative probe connected to positive of DC supply oscilloscope?
If the positive probe of the oscilloscope is connected to the negative terminal and the negative probe is connected to the positive terminal of a DC supply, the oscilloscope will display an inverted signal. This means that the voltage reading will be negative, effectively showing the opposite polarity of the actual DC voltage. The magnitude of the reading will remain the same, but the trace on the oscilloscope will appear flipped around the zero voltage line.
What precautionary steps have to be taken when using an oscilloscope?
Beware using ground clips for high speed measurements.Beware of oscilloscope bandwidth limitations.Ensure the correct triggering.Use the right oscilloscope probe.Remember to calibrate the oscilloscope probe.Beware using ground clips for high speed measurements.Beware of oscilloscope bandwidth limitations.Ensure the correct triggering.Use the right oscilloscope probe.Remember to calibrate the oscilloscope probe.
What kind of products does LeCroy make?
Teledyne LeCroy manufacturers oscilloscope probes. Teledyne LeCroy also offers an option to have a oscilloscope probe serviced with them if there is ever an issue.
How can you maesure using oscilloscopes?
To measure using an oscilloscope, connect the oscilloscope probe to the signal source. Adjust the time and voltage scales on the oscilloscope to properly display the waveform. Use the cursors and measurements feature on the oscilloscope to measure parameters like frequency, amplitude, rise time, and pulse width.
How do you make an oscilloscope trace brighter?
To make an oscilloscope trace brighter, you can adjust the vertical sensitivity (volts per division) to a lower setting, which increases the amplitude of the displayed signal. Additionally, increase the intensity or brightness setting on the oscilloscope if available. Lastly, ensure the oscilloscope is properly calibrated and that the probe is correctly connected to minimize signal loss.
How do you measure transient voltage?
Transient voltage can be measured using an oscilloscope equipped with a high-bandwidth probe, which allows for capturing fast voltage changes. Connect the probe across the points of interest in the circuit to record the voltage waveform. The oscilloscope will display the transient events, enabling analysis of their amplitude, duration, and frequency characteristics. It's crucial to ensure the oscilloscope's bandwidth exceeds the frequency of the transients being measured for accurate results.
Will an oscilloscope probe be used in future medical procedures?
In a certain sense oscilloscope probes are already being used in medicine today. An oscilloscope is simply a machine that visually represents changes in voltage. Thats what EKG and EEG machines do - they measure the electrical activity in your heart and brain respectively and use probes to do it.
What is the function of a logic probe?
To tell you the state of a logic signal, when the state changes are infrequent and the cost of an oscilloscope or logic analyzer would be inappropriate/excessive.
