Acquisition and waveform setup
R&S
®
RTE
189User Manual 1326.1032.02 ─ 20
5.3.3 Power calculation
Access: "Vertical" menu > "Power Calculation"
Make sure that the correct channel tab is selected.
Measurement impedance
Sets the impedance of the channel for power calculations and measurements.
Remote command:
CHANnel<m>:IMPedance on page 1120
5.4 High definition mode
The high definition mode offers up to 16 bits of vertical resolution. Higher vertical reso-
lution reduces quantization noise and acquires waveforms of higher accuracy with finer
details of the signal to be seen.
The number of vertical resolution bits defines the number of vertical levels that the
acquisition samples are mapped to (quantization). 16 bits of resolution represent
65536 voltage quantization levels, while 8 bits of resolution represent only 256 voltage
levels. The waveform values are recorded with 16 bit word length, except for peak
detect decimation.
The higher vertical resolution is achieved by applying a digital low pass filter (DSP fil-
ter) to the output of the ADC, which reduces the bandwidth of the signal. Increasing the
bandwidth reduces the resulting digital resolution. The high definition is also applied to
the digital trigger, thus the R&S RTE can trigger with the same high resolution with
which they can display signals.
High definition can be used, for example, to measure slow pulses with high accuracy,
or to analyze AM signals with very low modilation index, as used in radar.
See also:
●
Chapter 5.1.1, "Vertical system", on page 166
High definition mode
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