Connection of Test Probes
Test probes may be connected using different methods.
Soldering and Wire-wrap
The most widely used way to connect test probes is soldering I.e. a wire is soldered to the test probe and connected to test electronic in the fixture or a connector at the rear.
In recent years another method which is growing is the use of a dedicated PCB soldered to the test probe sockets. The sockets may have a solder cup or a wire-wrap pin. The holes in the PCB should match the size of the socket terminal. The small holes for the wire-wrap pins make more space routing and components.
The dedicated PCB is very often used in two ways. It may either be used as a pure connector board. Connecting the test probes to connectors. Or it may be used to connect test probes to the necessary on-board test electronic.
Connector PCB Advantages
- quick and reliable connection of test probes
- good documentation
- less wrong connections
- better transmission of high frequencies
- well defined impedances
Connector PCB Disadvantages
- use of time to design PCB
- cost of PCB
- difficult to replace socket
- difficult to change wiring
- difficult to add new test probe
- difficult to mount new version of PCB
- only access to one side of PCB