User manual

Acquisition and Setup
R&S
®
RTO
45User Manual 1316.0827.02 ─ 06
For detected active voltage probes, manual settings are not possible.
Current probes are not recognized automatically but the parameters of R&S current
probes (R&S RT-ZCxx) are known to the instrument. On the "Manual" mini-tab, select
the probe type with "Predefined probe". The correspondent "Vertical unit" and the "Man-
ual gain" are set.
For any other unrecognized probe, set "Predefined probe" to "Free" and enter the "Ver-
tical unit" and the "Manual attenuation" or "Manual gain" on the "Manual" mini-tab.
SCPI command:
PROBe<m>:SETup:ATTenuation:MODE on page 442
PROBe<m>:SETup:ATTenuation[:AUTO] on page 442
PROBe<m>:SETup:ATTenuation:DEFProbe on page 442
PROBe<m>:SETup:ATTenuation:UNIT on page 443
PROBe<m>:SETup:ATTenuation:MANual on page 443
PROBe<m>:SETup:GAIN:MANual on page 443
External attenuation: Scale, Attenuation
Considers 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 active
and passive 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 power-based unit (W):
attenuation (dB) = 10 * log
10
(attenuation factor)
For voltage-based unit (V and A):
attenuation (dB) = 20 * log
10
(attenuation factor)
SCPI command:
CHANnel<m>:EATScale on page 444
CHANnel<m>:EATTenuation on page 444
Offset
See "Offset" on page 39.
Set offset to mean
Performs an automatic compensation for a DC component of the input signal using the
result of a background mean measurement. The result is shown in "Offset". The function
supports quick and convenient measurements of input signals with different DC offsets.
It detects offset values even when the signal is out of the current measurement range.
SCPI command:
PROBe<m>:SETup:OFFSet:TOMean on page 445
Reference for Acquisition and Setup