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Each Buffer Entry is controlled by a "buffer gate" that defines the start and end of the entry time interval. The gate signal may be internally or externally generated in several different ways. Attribute Tree Node: \Boonton55xxx\Instrument Specific\Channel\MeasurementBuffer\Gate Mode Declaration: Btn55xxx.h Implementation: Btn55xxx.dll
ParametersVi The ViSession handle that you obtain from the IviDriver_init or IviDriver_InitWithOptions function. The handle identifies a particular instrument session. RepCapIdentifier Must be VI_NULL or an empty string. This attribute is not defined on a repeated capability. AttributeID Must be BTN55XXX_ATTR_GATE_MODE. AttributeValue (GetAttribute) Returns the current value of the attribute. The user must specify the address of a variable that has the same data type as the attribute. AttributeValue (SetAttribute) The value to which to set the attribute.
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Name |
Description |
BTN55XXX_VAL_MEAS_BUFF_GATE_BURST |
Each buffer entry consists of a single pulse or burst. The start and end of the burst are automatically identified by comparing the measured input signal to a preset signal threshold. Gate qualifying and delay options are available to align the gate interval with desired portion of a burst. |
BTN55XXX_VAL_MEAS_BUFF_GATE_MARKER |
Each buffer entry is "between markers" interval for one triggered sweep. This mode is used with the power sensor operating in triggered pulse mode, and the sweep system and markers are used to define the start and end of each gate interval. The entire gate interval must fall within the limits of the visible trace, so trigger and timebase settings must be appropriate for the signal. |
BTN55XXX_VAL_MEAS_BUFF_GATE_EXT_GATE |
Each buffer entry consists of a single measurement interval gated by the logic state of the MIO input. Qualifying and delay options are available to align the gate interval with the MIO input. |
BTN55XXX_VAL_MEAS_BUFF_GATE_PERIODIC |
Buffer entries are self-timed intervals with user-defined period and duration. If period and duration are equal, there will be no gap between successive intervals. |
BTN55XXX_VAL_MEAS_BUFF_GATE_EXT_TRIG |
Each buffer entry is initiated by assertion of the MIO input and ends after a user-defined duration. Qualifying and delay options are available to align the gate start with the MIO input. |
Requirements55006, 55318, 55340, 55518, 55540
See Also