2-12
IM PX8000-02EN
Setting the Input Coupling (Coupling)
AC: Only displays the waveform produced from the input signal’s AC component.
DC: Displays the waveform produced from both the DC and AC components of the input signal.
GND: Displays the ground level.
Nothing is displayed if DC is selected.
If AC is selected
If GND is selected
Displays the specified input coupling
Input Coupling and Frequency Response
The frequency responses when the input coupling is set to AC and DC are shown below.
Note that the PX8000 does not acquire low-frequency signals or signal components if the input
coupling is set to AC as indicated in the figure below.
0 dB
–3 dB
–3 dB point
Attenuation
0 dB
–3 dB
–3 dB point
Attenuation
Input frequency
Input frequency
If AC is selected
If DC is selected
–3 dB point for AC coupling
CAUTION
If the input coupling is AC, in accordance with the frequency response, the input signal is attenuated
more in lower frequencies. As a result, even when a high voltage signal is actually applied, it may not
be measured as a high voltage signal. Furthermore, the PEAK OVER message may not be displayed
on the screen. As necessary, switch the input coupling to DC to check the input signal voltage.
Applying an input signal whose voltage exceeds the maximum input voltage of the AUX
module may damage the input section.
French
ATTENTION
Si le courant du couplage d’entrée est alternatif (CA), conforme à la réponse en fréquence, le
signal d’entrée est davantage atténué aux fréquences plus basses. Par conséquent, même si
vous appliquez un signal de tension élevée, ce dernier risque de ne pas être mesuré comme
tel. De plus, le message de dépassement de plage (PEAK OVER) risque de ne pas s’afficher à
l’écran. Le cas échéant, basculez le couplage d’entrée sur CC (courant continu) afin de vérifier
la tension du signal d’entrée.
Si la tension du signal d’entrée dépasse la tension d’entrée maximale du module AUX, la
section d’entrée risque d’être endommagée.
Setting the Probe Attenuation (Probe)
1:1, 10:1, 100:1, 1000:1:
Displays the voltage probe attenuation
Note
If the probe attenuation is not set correctly, the input signal voltage will not be displayed correctly. For
example, if you use a 10:1 voltage probe but set the probe type to 1:1, the automatically measured amplitude
of the waveform will be 1/10 the real value.
2.4 Configuring Sensor Input Voltage Measurements