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Introduction to Programming
Using the DIGITIZE Command
Using the DIGITIZE Command
The DIGITIZE command is a macro that captures data using the acquisition
(ACQUIRE) subsystem. When the digitize process is complete, the acquisition
is stopped. You can measure the captured data by using the oscilloscope or by
transferring the data to a computer for further analysis. The captured data
consists of two parts: the preamble and the waveform data record.
After changing the oscilloscope configuration, the waveform buffers are cleared.
Before doing a measurement, you should send the DIGITIZE command to
ensure new data has been collected.
You can send the DIGITIZE command with no parameters for a higher
throughput. Refer to the DIGITIZE command in the chapter, “Root Level
Commands” for details.
When the DIGITIZE command is sent to an oscilloscope, the specified channel’s
waveform is digitized using the current ACQUIRE parameters. Before sending
the :WAVEFORM:DATA? query to download waveform data to your computer,
you should specify the WAVEFORM parameters.
The number of data points comprising a waveform varies according to the
number requested in the ACQUIRE subsystem. The ACQUIRE subsystem
determines the number of data points, type of acquisition, and number of
averages used by the DIGITIZE command. This lets you specify exactly what
the digitized information contains. The following program example shows a
typical setup:
OUTPUT 707;":SYSTEM:HEADER OFF<terminator>
OUTPUT 707;":ACQUIRE:MODE RTIME"<terminator>
OUTPUT 707;":ACQUIRE:COMPLETE 100"<terminator>
OUTPUT 707;":WAVEFORM:SOURCE CHANNEL1"<terminator>
OUTPUT 707;":WAVEFORM:FORMAT BYTE"<terminator>
OUTPUT 707;":ACQUIRE:COUNT 8"<terminator>
OUTPUT 707;":ACQUIRE:POINTS 500"<terminator>
OUTPUT 707;":DIGITIZE CHANNEL1"<terminator>
OUTPUT 707;":WAVEFORM:DATA?"<terminator>
This setup places the oscilloscope into the real time sampling mode using eight
averages. This means that when the DIGITIZE command is received, the
command will execute until the waveform has been averaged at least eight
times.
After receiving the :WAVEFORM:DATA? query, the oscilloscope will start
downloading the waveform information.
Digitized waveforms are passed from the oscilloscope to the computer by
sending a numerical representation of each digitized point. The format of the
numerical representation is controlled by using the :WAVEFORM:FORMAT
command and may be selected as BYTE, WORD, or ASCII.
Summary of Contents for Infiniium 8000A
Page 1: ...Agilent Technologies Infiniium 8000A Programmer s Reference ...
Page 2: ......
Page 20: ...Contents 16 ...
Page 21: ...1 Introduction to Programming ...
Page 43: ...2 LAN and GPIB Interfaces ...
Page 53: ...3 Message Communication and System Functions ...
Page 58: ...3 6 ...
Page 59: ...4 Status Reporting ...
Page 78: ...4 20 Figure 4 3 Status Reporting Decision Chart ...
Page 79: ...5 Programming Conventions ...
Page 84: ...5 6 Programming Conventions The Command Tree Figure 5 1 Command Tree ...
Page 85: ...5 7 Programming Conventions The Command Tree Figure 5 2 Command Tree Continued ...
Page 86: ...5 8 Programming Conventions The Command Tree Figure 5 3 Command Tree Continued ...
Page 87: ...5 9 Programming Conventions The Command Tree Figure 5 4 Command Tree Continued ...
Page 88: ...5 10 Programming Conventions The Command Tree Figure 5 5 Command Tree Continued ...
Page 89: ...5 11 Programming Conventions The Command Tree Figure 5 6 Command Tree Continued ...
Page 94: ...5 16 ...
Page 95: ...6 Sample Programs ...
Page 149: ...7 Acquire Commands ...
Page 176: ...7 28 Acquire Commands SRATe AUTO ...
Page 177: ...8 Bus Commands ...
Page 187: ...9 Calibration Commands ...
Page 195: ...10 Channel Commands ...
Page 223: ...11 Common Commands ...
Page 247: ...12 Digital Commands ...
Page 254: ...12 8 ...
Page 255: ...13 Disk Commands ...
Page 300: ...13 46 Disk Commands STORe Obsolete ...
Page 301: ...14 Display Commands ...
Page 322: ...14 22 ...
Page 323: ...15 External Trigger Commands ...
Page 343: ...16 Function Commands ...
Page 382: ...16 40 ...
Page 383: ...17 Hardcopy Commands ...
Page 391: ...18 Histogram Commands ...
Page 403: ...19 InfiniiScan ISCan Commands ...
Page 421: ...20 Limit Test Commands ...
Page 429: ...21 Marker Commands ...
Page 452: ...21 24 ...
Page 453: ...22 Mask Test Commands ...
Page 499: ...23 Measure Commands ...
Page 636: ...23 138 Measure Commands VUPPer ...
Page 637: ...24 Pod Commands ...
Page 642: ...24 6 ...
Page 643: ...25 Root Level Commands ...
Page 645: ...25 3 STORe SETup STORe WAVeform TER Trigger Event Register VIEW ...
Page 674: ...25 32 ...
Page 675: ...26 Self Test Commands ...
Page 679: ...27 System Commands ...
Page 694: ...27 16 ...
Page 695: ...28 Time Base Commands ...
Page 708: ...28 14 ...
Page 709: ...29 Trigger Commands ...
Page 822: ...29 114 ...
Page 823: ...30 Waveform Commands ...
Page 893: ...31 Waveform Memory Commands ...
Page 902: ...31 10 ...
Page 903: ...32 Error Messages ...
Page 914: ...32 12 ...