Particularly for HF measurements on IC´s, a short as possible ground connection is recommendable. Due to long ground leads most conventional adaptations bring additional inductance and resonances into the measurement which will result in false or inaccurate readings. The innovative IC contacting system of the HZ355 with 5 different IC adapters from 0.5 to 1.27 mm pitch in combination with the ground blade and IC ground copper pad is the ideal solution for short-circuit-safe, reproducible, and authentic measurements.
These great advantages and multiple accessory parts for the new HZ355 probe series will offer various configuration to solve most adaptation desires.
Compensation
The probe can be adjusted for low frequency (LF) compensation and for high frequency (HF) compensation.
LF Compensation (Probe Adjust 1 kHz)
LF needs to be adjusted when the probe is connected to the scope input the first time. LF compensation matches the probes cable capacitance to the oscilloscope input capacitance. This matching assures good amplitude accuracy from DC to upper bandwidth limit frequencies. A poorly compensated probe clearly influences the overall system performance (probe + scope) and introduces measurement errors resulting in inaccurate readings and distorted waveforms.
LF compensation is performed by connecting the probe to the probe adjust output on the oscilloscope front panel and adjusting the LF compensation trimmer to optimum square wave response. For clarification see below figures.
HF Compensation (Probe Adjust 1 MHz)
It is typically not necessary to adjust HF compensation unless the probe is being used with an oscilloscope having large differences in input characteristics to the instruments of the HMO series. In this case you should check the probes high frequency response and adjust it if necessary. We recommend to use the internal Probe Adjust Generator in 1 MHz mode.
Adjust trimmers (T1 and T2) for optimum square wave response.
T1 is used for rise time adjustment.
T2 influences probe response time.