To achieve this attenuators are built into the end of the probe that connects with the circuit under test. To enable better accuracy to be achieved higher levels of impedance are required. However for applications where better accuracy is needed and as frequencies start to rise, other test probes are needed. They offer the same input impedance of the oscilloscope which is normally 1 MΩ. The X1 probes are suitable for many low frequency applications. The designation refers to the factor by which the impedance of the scope itelf is multiplied by the probe. They are normally designated X1 and X10, although 1X and 10X are sometimes seen. There are two main types of passive voltage scope probes. Oscilloscope probe tip X1 and X10 oscilloscope probes This is ultimately the part which breaks. Unfortunately the fact that they are clipped on to leads of equipment puts a tremendous strain on the mechanical clip arrangement. Although they are robustly manufactured, any electronics laboratory will consider oscilloscope probes almost as "life'd" items that can be disposed of after a while when they are broken. This comprises a mechanical clip arrangement so that the probe can be attached to the appropriate test point, and an earth or ground clip to be attached to the appropriate ground point on the circuit under test.Ĭare should be taken when using oscilloscope probes as they can break. Oscilloscope probes normally comprise a BNC connector, the coaxial cable (typically around a metre in length) and what may be termed the probe itself. While it is possible to use an odd length of coax cable with a BNC connector on one end and open wires with crocodile / alligator clips on the other, this is not ideal and purpose made oscilloscope probes provide a far more satisfactory solution. To connect the scope to the point to be monitored it is necessary to use screened cable to prevent any pick-up of unwanted signals and in addition to this the inputs to most oscilloscopes use coaxial BNC connectors. However it is necessary to have a method of connecting the input of the oscilloscope to the point on the equipment under test that needs monitoring. Oscilloscopes are widely used for test and repair of electronics equipment of all types. Scope probes include: Oscilloscope probes Probe compensation Oscilloscope probe specifications
Oscilloscope basics Oscilloscope types Specifications How to use an oscilloscope Scope triggering Oscilloscope probes Oscilloscope probe specifications Oscilloscope probes An overview or tutorial about the various types of oscilloscope probe that are available for use with oscilloscopes.