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Acquisition and waveform setup
R&S
®
MXO 5 Series
119User Manual 1802.3369.02 ─ 02
External Attenuation: Scale, Attenuation
Consider a voltage divider that is part of the DUT before the measuring point. The
external attenuation is included in the measurement, and the instrument shows the
results that would be measured before the divider. External attenuation can be used
with all probes.
"Scale"
Select linear or logarithmic attenuation scale.
"Attenuation"
Enter the attenuation of the voltage divider according to the selected
scale. The conversion from linear to logarithmic values depends on
the "Vertical unit" of the probe:
For voltage-based unit (V and A):
attenuation (dB) = 20 * log
10
(attenuation factor)
For power-based unit (W):
attenuation (dB) = 10 * log
10
(attenuation factor)
Remote command:
CHANnel<ch>:EATScale on page 468
CHANnel<ch>:EATTenuation on page 468
Impedance
Sets the impedance of the connected probe for power calculations and measurements.
The value is used, for example, for scale calculation in the spectrum diagram.
Remote command:
CHANnel<ch>:IMPedance on page 469
6.4 Probes
With R&S MXO 5 oscilloscopes, you can use various probe types. Mostly these probes
are passive and active voltage probes. The instrument can detect many probes and
read out the probe-specific parameters, for example, bandwidth and attenuation.
You find all settings that are relevant for the connected probe in the "Vertical" > "Probe"
tab. The settings on the "Probe" tab change according to the type of the attached
probe. Probes with Rohde & Schwarz probe interface (probe box), and also many
other passive voltage probes, are recognized by the instrument. The R&S MXO 5
reads out the main characteristics of the probe and displays them. Other probes can-
not be detected, but their characteristics are known to the instrument. These known
probes are called "Predefined probes". Probes that are not recognized automatically
and not predefined are unknown probes, they require manual setting of measurement
unit and attenuation.
The complete characteristic of the connected probe is shown on the "Vertical" > "Probe
Info" tab.
6.4.1 Common probe settings
Access: "Menu" > "Vertical" > "Probe" tab
Probes
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