Command Groups
MDO4MSO instal
led). When
DATa:SOUrce is set to one of these, the data points
are binary states (0 or 1). These data points can be transferred in widths of 1or2
bytes, as signed or unsigned integers.
DIGital - The Digital Collection. These data points are binary states (0 or 1) that
can be transferred in widths of 4 or 8 bytes, as signed or unsigned integers. For
ASCII encoding, the data is transferred as hexadecimal values with leadingzeroes
suppressed. When
DATa:SOUrce is set to DIGital, this represents a collection
of information that differs dependingonthedatawidth(setusingeitherthe
DATa:WIDt
h
or WFMOutpre:BYT_Nr command.)
When the data width is set to 4 bytes, the Digital Collection is the states of
digital c
hannels D0 – D15, plus the digital representations of analog channels
1 – 4, plus the trigger state.
When the
data width is set to 8 bytes, the Digital Collection is the transition
state information for digital channels D0 – D15, plus the digital representations
of analog channels 1 – 4. For more information, see the section below
“Further Explanation of Digital Collection Data”. (MSO/MDO4000/B models
only as well as MDO3000 and MDO4000C series models with options
MDO3MSO or MDO4MSO installed).
RF_NORMal, RF_AVErage, RF_MAXHold, RF_MINHold -thesearetheRF
frequency domain traces (MDO4000/B/C and MDO3000 models only). When
DATa
:SOUrce
is set to one of these traces, the data points represent the amplitude
of the trace in watts, and are floating point values. The frequency domain trace
data is returned as 4-byte floating point values. (Note that
CURVe? always returns
linear watts, not the display units.)
RF_AMPlitude, RF_FREQuency, RF_PHASe – these are the RF time domain
traces (MDO4000/B/C series models only.) When
DATa:SOUrce is set to one of
these traces, the data points are the Amplitude vs. Time, Frequency vs. Time, or
Phase vs. Time representations of the RF input signal.
The RF time domain traces are returned as 1-byte or 2-byte integers, depending
on the
DATa:WIDth setting. The default is 1 byte per point.
RF_FREQuency – frequency in Hz.
RF_PHASe – phase in degrees.
RF_AMPlitude – amplitude in Volts.
MATH — The format of MATH data is dependent upon the sources for the math
waveform. For analog channel sources, the format is that for the analog channels
described above. For spectrum math, the format is the same as for RF frequency
domain traces, which is 4-byte floating point data.
REF1-REF4 — The format of REF data is dependent upon the sources from
which the reference waveform was created. For analog channel sources, the
format is that for the analog channels described above. For RF frequency domain
2-98 MDO4000/B/C, MSO/DPO4000B and MDO3000 Series Oscilloscopes Programmer Manual
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