User Manual

Characteristics of Differential Probes
R&S
®
RT-ZHD07/15/16/60
31User Manual 1800.2588.02 ─ 01
Figure 3-3: Signal curves (e.g. R&S RT-ZHD15)
a) = Two signals of ±750 V and opposing phase are applied to positive and negative inputs. At the peaks,
the probe is driven with an input voltage of ±1500 V between the positive and negative signal pin. The
dynamic range limit is reached.
b) = The negative signal pin is connected to ground, the positive pin is driven with an input voltage of
±1500 V. Dynamic range and operating voltage window are used completely. Note that the oscilloscope
displays the same waveform as with example a).
c) = Dynamic range limit is exceeded. The oscilloscope displays a clipped signal.
d) = Operating voltage window is exceeded. The oscilloscope displays a clipped signal.
Signal clipping
Only differential input signals are detected by the probe and displayed by the base unit.
The probe suppresses common mode signals. Therefore, the probe indicates an over-
voltage at the input terminals by LED and by a buzzer signal (can be switched off).
Clipping of HF-signals
The overvoltage indication works well on DC-signals. AC-signal (frequencies above
some kHz) are not covered by the overvoltage indication.
Dynamic Range and Operating Voltage Window