Yokogawa Launches Differential Probe for Vehicle Serial Buses

Yokogawa Electric has introduced its PBDH1000, a differential probe designed to develop and test in-vehicle buses such as CAN and FlexRay. The probe, which is intended for use with the Yokogawa DL9000 Series of oscilloscopes or the SB5000 range of serial bus analysers, has a frequency bandwidth of DC to 1 GHz (-3dB or more), an attenuation ratio of 50:1 and a DC accuracy within ±2%. The PBH1000 uses standard oscilloscope probes for high-frequency serial bus testing: typically because of limited voltage range, susceptibility to transient surge damage, and excessive input capacitance or low impedance. The solution is to use a probe such as the PBH1000 with higher input impedance and lower capacitance.



The PBH1000 is for use in the in-vehicle test environment, and will withstand maximum voltages of ±100 V (transient) and ±35 V (continuous). Input impedance is approximately 1 megohm and 1.1 pF to ground, and differential input impedance is approximately 2 megohm and 0.6 pF. Probe power is supplied via the oscilloscope input connector. Typical applications include observing waveforms on in-vehicle CAN or FlexRay bus systems, checking the noise on high-speed devices for bus power supplies, and evaluating the digital circuit within bus systems.