Logic Analyzer Probes & Connectors Tutorial

- in view of the number of connections that need to be made between the circuit or system under test and the logic analyser, probes and connectors are a key issue.

With logic analysers being able to monitor a vast number of points, one of the key issues is connecting to the various points needed.

Both probes and special connectors are used for logic analyser systems to enable good reliable connections to be made in the easiest fashion.


Logic analyzer probes

With the large number of signals required to be monitored, often from a small area on a board and possibly even from one integrated circuit, the design of the probes can be a critical issue.

The logic analyzer probes contain an internal comparator where the voltage of the waveform on the board is compared against the threshold voltage. This can be set using the main instrument to a variety of levels so that signals from a variety of logic families can be monitored.

Logic analyzer probes can take a variety of physical forms, but generally fall into one of three categories:

  • Multichannel probes that use a dedicated connector on the circuit board. These probes enable a large number of points to be accessed using a high density connector. This facility has to be designed on to the board and may only be retained for the development phase where access for a logic analyzer is required.
  • High density compression probes. These probes use a compression contact that does not have a dedicated connector. Contacts on the board are required for this type of connection.
  • Flying lead probes. As the name implies, these probes are on a flying lead that is connected to a small electronic unit that contains the electronics for detecting the high and low levels. However these flying lead probes are used to monitor points that may not be included on any of the other access points.

By Ian Poole


<< Previous   |   Next >>


Share this page


Want more like this? Register for our newsletter









Refining IoT Technology to Address Demands of the Healthcare Market Mark Patrick | Mouser Electronics
Refining IoT Technology to Address Demands of the Healthcare Market
The Internet of Things, IoT is destined to affect many areas of everyday life - we expect it will include many areas like smart meters, remote control of lighting, but what about the healthcare market . . .
Training
Online - Effective Vector Network Analyzer Measurements
How to make effective VNA measurements at RF and microwave frequencies

More training courses

Whitepapers
The Market Opportunity for Envelope Tracking
Envelope tracking specialist Nujira looks at the market opportunities for Envelope Tracking: where it can be used; market forecasts; new and existing applications, etc. Read it now.

More whitepapers










Radio-Electronics.com is operated and owned by Adrio Communications Ltd and edited by Ian Poole. All information is © Adrio Communications Ltd and may not be copied except for individual personal use. This includes copying material in whatever form into website pages. While every effort is made to ensure the accuracy of the information on Radio-Electronics.com, no liability is accepted for any consequences of using it. This site uses cookies. By using this site, these terms including the use of cookies are accepted. More explanation can be found in our Privacy Policy