Sending Commands and Interrogatives 127
READ and UPDATE commands
These commands are used to control obtaining measurement data from the
2801/2 in the normal manner.
UPDATE=value – sets the rate at which new measurement data becomes
available to this interface to ‘value’ milliseconds. If UPDATE=0 is specified
then the measurement results are only updated each time that a new
READ=data command is received, but not at any other time.
READ=data – specifies the data which is to be read by the interface.
Data is a set of one or more data request definitions, each separated from any
others by the comma character. Each data request definition follows a
common general format –
Note: For RS232 after sending the READ = command, you must send the
character “ ? ” to the unit or you will not get a reply
Keyword[Fields]
Where –
Keyword
defines the general data being requested
Fields
contains none to many additional specifications which serve
to exactly define the data being requested. Each field
specification is separated from any others by the comma
character. If no fields are specified then the square braces
may be omitted.
In general the ‘fields’ portion is made up of none, one or more than one
textual specification, followed by either a) none or three integer specifications
or b) a single integer specification followed by none or two floating point
specifications.
The available textual specifications are selected as none or one from each of
the following groups, these may be specified in any order, but must always be
before any numeric specifications –
Summary of Contents for Xitron 2801
Page 1: ...USER GUIDE 2801 2802 Advanced Single and Dual Channel Power Analyzers...
Page 2: ...2 2801 2802 Power Analyzer User Guide...
Page 10: ...10 2801 2802 Power Analyzer User Guide...
Page 101: ...Printing Results 101 Figure 66 Configuration Printout...
Page 102: ...102 2801 2802 Power Analyzer User Guide Figure 67 Waveform Channel 1 Real time...
Page 103: ...Printing Results 103 Figure 68 Waveform Channe1 Distortion...
Page 104: ...104 2801 2802 Power Analyzer User Guide Figure 69 History Chart VOLTS ACDC Trends View...
Page 105: ...Printing Results 105 Figure 70 History Chart AMPS PERCENT THD Extents View...
Page 106: ...106 2801 2802 Power Analyzer User Guide Figure 71 Harmonics Listing page 1...
Page 107: ...Printing Results 107 Figure 72 Harmonics Listing page 2...
Page 145: ...Sending Commands and Interrogatives 145...
Page 147: ...Appendix A Physical Specifications 147...
