CN103185820A - Oscilloscope with automatic cursor tracing function - Google Patents
Oscilloscope with automatic cursor tracing function Download PDFInfo
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- CN103185820A CN103185820A CN2011104489441A CN201110448944A CN103185820A CN 103185820 A CN103185820 A CN 103185820A CN 2011104489441 A CN2011104489441 A CN 2011104489441A CN 201110448944 A CN201110448944 A CN 201110448944A CN 103185820 A CN103185820 A CN 103185820A
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Abstract
The invention provides an oscilloscope with an automatic cursor tracing function, which is used for displaying acquired waveform data on a display interface in a waveform display manner. The oscilloscope comprises a measurement unit, a control key and a display control unit, wherein the measurement unit is used for measuring the waveform data for multiple times according to a plurality of measurement items set by a user to acquire a measurement boundary of each measurement item; the control key is used for selecting one of the measurement items and generating measurement item selection information corresponding to the selected measurement item; and the display control unit is used for acquiring the measurement boundary of the corresponding measurement item according to the measurement item selection information, and marking a cursor on the display interface according to the acquired measurement boundary. According to the oscilloscope, the control key can be used for selecting the measurement item traced by the cursor; the display control unit acquires the measurement boundary of the corresponding measurement item according to the selection of the different measurement items by the user; the cursor marking the measurement boundary can conduct tracing switching among the different measurement items; the measurement items are not required to be reconfigured as that in the prior art; and the oscilloscope is simple and convenient to operate.
Description
Technical field
The present invention relates to the thermometrically technical field, particularly relate to a kind of oscillograph with automatic cursor tracking function.
Background technology
Oscillograph is a kind of electronic surveying instrument commonly used.The user often needs to pay close attention to the various waveform characteristics of measured signal in using oscillographic process, modern oscillograph all can provide multiple built-in measurement function, by different measurement items is set, for example: amplitude, cycle, rise time, dutycycle etc., assisted user carries out measurement and the analysis of waveform characteristic at measured signal.Concrete, oscillograph converts measured signal to Wave data, afterwards, according to the measurement item that the user arranges Wave data is measured, obtained the Measured Boundary that each measures item, last, according to described Measured Boundary, obtain each by described Wave data and measure a corresponding measured value.
Cursor is followed the trail of merit a kind of visual user interface is provided, the measurement result of the waveform characteristic that the user is paid close attention to marks with visual way, also namely, utilize cursor to indicate the Measured Boundary of measuring item at display interface, this cursor is generally horizontal cursor or vertical cursors.Existing cursor is followed the trail of following dual mode usually:
A kind of mode is that manual cursor is followed the trail of.This mode is used for the waveforms amplitude of track user assigned address, by cursor is adjusted on the assigned address, thereby the waveforms amplitude at diverse location place is followed the trail of.The user can use the knob key of front panel to regulate the position that cursor is followed the trail of, and the position that rotation knob key is namely revised cursor uses vertical cursor to be indicated in coordinate position on the transverse axis usually.In addition, also can realize by the direct soft operations such as position of revising vertical cursor of software interface.The manual cursor mode of following the trail of, owing to can only indicate the Measured Boundary of waveforms amplitude, therefore, the user can't visually observe other commonly used measures, for example, cycle, the Measured Boundary of dashing etc. in advance.
Another kind of mode is that automatic cursor is followed the trail of.Follow the trail of with respect to manual cursor, cursor is followed the trail of for the visualization measurement function and is had bigger value automatically.The user must arrange at least one earlier and measure item before the automatic cursor of use is followed the trail of the measurement item, oscillograph generally provides front panel keys or software interface that option is set and for the user measurement item is set.Existing automatic cursor is only followed the trail of the Measured Boundary that last that can arrange the user measure and is followed the trail of sign.For example, the user has set gradually 5 and has measured: the cycle, dash in advance, positive pulsewidth, amplitude, rising edge time, then cursor only can indicate the Measured Boundary of rising edge during the time.As shown in Figure 1, follow the trail of the display interface synoptic diagram for last cursor of measuring a rising edge time.Get horizontal ordinate and the ordinate of some A at 20% place of this rising edge amplitude, get horizontal ordinate and the ordinate of some B at 80% place of this rising edge amplitude, with the ordinate of the A lower boundary as the rising edge time, indicate the cursor S1 of a level; With the ordinate of the B coboundary as the rising edge time, indicate the cursor S2 of a level; With the horizontal ordinate of the A left margin as the rising edge time, indicate a vertical cursor S3; With the horizontal ordinate of the B right margin as the rising edge time, indicate a vertical cursor S4.As can be seen, the cursor that indicates is a cursor line actually.Fig. 1 only follows the trail of with a kind of cursor of measuring item and gives an example, and the cursor that indicates Measured Boundary can be one, for example maximal value, minimum value; Can also be two, peak-to-peak value for example; Can also be four, rising edge time etc. for example.Decide according to different measurement items and the configuration of dispatching from the factory.
When indicating cursor, oscillograph is also measured Wave data, obtain the corresponding measured value of measuring item, as shown in Figure 1, owing to only be provided with this measurement item of rising edge time, therefore, the S5 place, measured value viewing area in the lower left corner of display interface demonstrates the measured value of rising edge time: " Rise=18.50ns ".
At existing automatic cursor method for tracing, if the user expects other waveform characteristics of visual inspection, the measurement item that then needs to follow the trail of is set to last and measures, therefore need extra operation such as measure and realize complex steps by resetting.As can be seen, when the user wants to pay close attention to a plurality of waveform characteristic of measured signal, existing digital oscilloscope can't provide a kind of simple, easy-to-use mode of operation to follow the trail of a plurality of measurements items, also, can not indicate a plurality of Measured Boundary of measuring item by shirtsleeve operation.
Summary of the invention
The invention provides a kind of oscillograph with automatic cursor tracking function, in order to solve problems of the prior art.
A kind of oscillograph with automatic cursor tracking function is used at a display interface, presents the Wave data that gets access to the waveform display mode, and it comprises:
Measuring unit is used for according to a plurality of measurements items that the user arranges described Wave data being taken multiple measurements, and obtains the Measured Boundary that each measures item;
Operating key is used for from one of them measurement item of described a plurality of measurements selection, and generation and a selected corresponding measurement item selection information of measuring;
Indicative control unit for according to a described measurement selection information, obtains the corresponding Measured Boundary of measuring item; And the Measured Boundary that foundation is obtained indicates cursor at described display interface.
By the present invention, the user can arrive the Measured Boundary of measured signal by the cursor visual inspection that indicates, simultaneously, utilize operating key can select the traceable measurement item of cursor, indicative control unit indicates the selected cursor of measuring the Measured Boundary of item at display interface.According to the selection of user to the different measuring item, make the cursor of sign between the different measuring item, follow the trail of switching, need not as prior art, to reconfigure and measure item, simple, convenient.
Illustrate as one, in the present invention, described measuring unit also is used for each Measured Boundary of measuring of storage, and after every pair of described Wave data carries out one-shot measurement, the Measured Boundary of storing is upgraded; Described indicative control unit obtains the corresponding Measured Boundary of measuring item for according to a described measurement selection information from the Measured Boundary of storing.
By being dynamic change owing to Wave data, every pair of Wave data of measuring unit carries out one-shot measurement, just the Measured Boundary of storing is upgraded, thereby is made the Measured Boundary that will indicate can follow current measured Wave data dynamically.
As an example, in illustrating, every pair of described Wave data of described measuring unit carries out one-shot measurement, obtains the Measured Boundary that one of them is measured, afterwards the Measured Boundary of this measurements item of storing is upgraded.
As an example, in illustrating, every pair of described Wave data of described measuring unit carries out one-shot measurement, obtains the Measured Boundary that each is measured successively, and the Measured Boundary that each of storing is measured is all upgraded afterwards.
As an example, in illustrating, every pair of described Wave data of described measuring unit carries out one-shot measurement, obtains the Measured Boundary that each is measured synchronously, and the Measured Boundary that each of storing is measured is all upgraded afterwards.
Illustrate as one, in the present invention, described display unit also is used for showing selective described a plurality of measurement items with the form of menu list.
As an example, in illustrating, described operating key is used for when every triggering one time, according to the order of described menu list, the measurement item of choosing is switched to current adjacent of choosing measure.
As an example, in illustrating, described operating key is the knob key, is used for when presetting angle of every rotation, according to the order of described menu list, the measurement item of choosing is switched to current adjacent of choosing measure on the item.
By triggering operating key or rotation operating key, can select the measurement item that cursor is followed the trail of, reached purpose simple to operate, easy to use equally.
Illustrate as one, in the present invention, described operating key also is used for choosing simultaneously described a plurality of measurements, and produces a measurement Xiang Quanxuan information; Described indicative control unit is used for the described measurement Xiang Quanxuan information of foundation, obtains the Measured Boundary of each measurement item, and measures the Measured Boundary of item according to each that obtain at the cursor of described display interface sign correspondence.This method can be carried out cursor to a plurality of Measured Boundary of measuring item simultaneously and be indicated, and has more perfect measurement characteristics visualization function.
As an example, in illustrating, described indicative control unit also is used for the Measured Boundary to the different measuring item, indicates dissimilar cursors at display interface.By indicating dissimilar cursors, can be distinguished the Measured Boundary of different measuring item, improved user's Experience Degree simultaneously.
Description of drawings
Fig. 1 is that the given a kind of cursor of measuring item of prior art is followed the trail of the display interface synoptic diagram;
Fig. 2 is a kind of structural representation with oscillograph embodiment of automatic cursor tracking function of the present invention;
Fig. 3 is the menu synoptic diagram on the illustrational a kind of display interface of the present invention;
Fig. 4 be the illustrational a kind of cursor mode of the present invention the interface synoptic diagram is set;
Fig. 5 is that the illustrational a kind of form with menu list of the present invention shows a plurality of interface synoptic diagram of measuring item;
Fig. 6 is that the illustrational a kind of peak-to-peak value cursor of the present invention is followed the trail of the display interface synoptic diagram;
Fig. 7 is that the illustrational a kind of positive pulsewidth cursor of the present invention is followed the trail of the display interface synoptic diagram.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
With reference to Fig. 2, show a kind of structural representation with oscillograph embodiment of automatic cursor tracking function of the present invention, the described oscillograph 200 of present embodiment is used at a display interface, presents the Wave data a that gets access to the waveform display mode, and it comprises:
Measuring unit 201 is used for according to a plurality of measurements items that the user arranges Wave data a being taken multiple measurements, and obtains the Measured Boundary b that each measures item;
Operating key 202 is used for from one of them measurement item of described a plurality of measurements selection, and generation and a selected corresponding measurement item selection information c that measures;
Common, oscillograph also comprises an AFE (analog front end), is used for inserting measured signal, and to measured signal amplify, pre-service such as decay, bandwidth restriction, also comprise a sampling unit, be used for pretreated measured signal is sampled, obtain digitized Wave data a.201 couples of Wave data a of measuring unit measure, and obtain measured value.Display unit 203 is presented in Wave data a and measured value on the display interface.
The waveform characteristic of the measurement item measured signal just that the user arranges, it can be cycle, maximal value, peak-to-peak value, rising edge time, negative edge time, positive pulse, negative pulse etc.Measure item except arranging, the information source that each measures item generally also will be set, the Data Source of source representation Wave data a, it can be the Wave data of a certain passage, as channel C H1 or channel C H2; Also can be the Wave datas of a plurality of passages through obtaining after a certain mathematical operation, for example, can be with CH1+CH2 as information source.The embodiment of the invention does not limit with the front and back order that information source is set the measurement item is set, and can arrange earlier and measure item, and setting and this measurement corresponding information source also can arrange information source earlier again, and the measurement item of its correspondence is set again.
Measuring unit 201 obtains Wave data a by measured signal is sampled, and a plurality of measurements items that arrange according to the user are measured Wave data a then, obtain the Measured Boundary b that each measures item.Be understandable that Measured Boundary b can be a value, for example maximal value, minimum value are represented with the value of ordinate Y; Measured Boundary also can be two values, and for example peak-to-peak value is represented with the value of two ordinate Y, for example the cycle, represents with the value of two horizontal ordinate X; Measured Boundary can also be four values, for example the rising edge time, can represent with the value of two horizontal ordinate Y and two ordinate Y.Measured Boundary has multiple value mode, decides according to dissimilar measurement items and the configuration of dispatching from the factory.
Need to prove when the measurable Wave data of many groups is arranged on the display interface, for example, have the rising edge of a plurality of pulses to measure, generally can measure according to a certain partial data that configuration is in advance chosen wherein.For example, measure the rising edge time, can choose on the display interface from left to right the Wave data of first pulse or choose the Wave data of last pulse or choose screen center and play the Wave data of from left to right first pulse and measure.
After measuring unit 201 obtains each Measured Boundary b that measures item, also can obtain each by Wave data a and measure a corresponding measured value according to Measured Boundary b, for example, peaked measured value is exactly the value of its corresponding Measured Boundary ordinate Y; The measured value of peak-to-peak value is exactly to utilize its corresponding Measured Boundary: two ordinate Y subtract each other and obtain.Accordingly, indicative control unit 203 also can show described measured value at display interface.Owing to the content that belongs to prior art with procedure for displaying of obtaining of measured value, the present invention does not repeat them here.
Operating key 202 is one of them measurement item of selection from described a plurality of measurements items, and generation and the selected corresponding measurement item selection information of item of measuring.For example, the measurement item that operating key 202 is chosen is peak-to-peak value, then produce the measurement item corresponding with peak-to-peak value and select information, indicative control unit 203 is according to measuring a selection information, from measuring unit 201, obtain two Measured Boundary of peak-to-peak value, be maximal value and the minimum value of Wave data a, and indicate the cursor of two levels according to the value of Measured Boundary at the correspondence position of described display interface.
The described cursor of the embodiment of the invention is followed the trail of, namely on described display interface, indicate a corresponding Measured Boundary of measuring with cursor.Because Wave data is dynamic change, measuring unit 201 need take multiple measurements Wave data, for example, can carry out one-shot measurement with regard to carrying out to the Wave data that changes every a predefined interval time.
Illustrate as one, in embodiments of the present invention, each Measured Boundary b that measures of measuring unit 201 storages, and after every couple of Wave data a carries out one-shot measurement, the Measured Boundary of storing is upgraded; Accordingly, indicative control unit 203 obtains the corresponding Measured Boundary b that measures item according to a measurement selection information c from the Measured Boundary that measuring unit 201 is stored.Every pair of Wave data of measuring unit carries out one-shot measurement, just the Measured Boundary of storing is upgraded, thereby is made the Measured Boundary b that will indicate can follow current measured Wave data a dynamically.
Suppose in illustrating, 5 of arranging of user measure and are followed successively by: cycle (Period), positive pulsewidth (+Width), pre-(Preshoot), amplitude (Vamp), the peak-to-peak value (Vpp) of dashing, then in the storage space of measuring unit 201, above-mentioned 5 the Measured Boundary b that measure item of special storage, the sequence order of the Measured Boundary b of its storage can be in proper order identical with arranging of measurement item, also can store according to the storage order that presets.
As a kind of example, in originally illustrating, measuring unit 201 every couple of Wave data a carry out one-shot measurement, obtain the Measured Boundary b that one of them is measured, and the Measured Boundary b to this measurements item of storing upgrades afterwards.That is to say that measuring unit 201 whenever carries out one-shot measurement, according to measuring arranging in proper order or pre-configured order of item, only choose aforementioned 5 of measuring in the item successively and measure, obtain a Measured Boundary b who measures item.Suppose that 201 couples of Wave data a of measuring unit carry out one-shot measurement, obtained the Measured Boundary of cycle (Period), afterwards, only the Measured Boundary in cycle (Period) of storing is upgraded, all the other Measured Boundary of measuring remain unchanged.
As another kind of example, in originally illustrating, measuring unit 201 every couple of described Wave data a carry out one-shot measurement, obtain the Measured Boundary b that each is measured successively, and the Measured Boundary b that each of storing is measured all upgrades afterwards.That is to say, measuring unit 201 whenever carries out one-shot measurement, according to measuring arranging in proper order or pre-configured order of item, choosing each measurement item successively measures, timesharing obtains each Measured Boundary of measuring item, afterwards, to aforementioned cycle of storing (Period) for example, positive pulsewidth (+Width), pre-Measured Boundary of dashing (Preshoot), amplitude (Vamp), peak-to-peak value (Vpp) all upgrades.
As another example, in originally illustrating, measuring unit 201 every couple of described Wave data a carry out one-shot measurement, obtain the Measured Boundary b that each is measured synchronously, and the Measured Boundary b that each of storing is measured all upgrades afterwards.That is to say, measuring unit 201 whenever carries out one-shot measurement, each is measured item carry out synchro measure, obtain the Measured Boundary that each measures item simultaneously, afterwards, to aforementioned cycle of storing (Period) for example, positive pulsewidth (+Width), pre-Measured Boundary of dashing (Preshoot), amplitude (Vamp), peak-to-peak value (Vpp) all upgrades.
Illustrate as one, in embodiments of the present invention, display unit 203 shows selective described a plurality of measurement items with the form of menu list.Order in the menu list can be to measure the order that arranges of item, also can be pre-configured particular order.
Below, with cycle (Period) of measured signal, positive pulsewidth (+Width), pre-to dash that a cursor that (Preshoot), amplitude (Vamp), these 5 of peak-to-peak values (Vpp) measure follows the trail of be that example describes.As shown in Figure 3, be the menu synoptic diagram on a kind of display interface, two kinds of menus about display interface has, left menu Left Menu provides the setting operation of measuring item for the user, listed a plurality of measurement items that arrange, having comprised: maximal value (Vmax), minimum value (Vmin), peak-to-peak value (Vpp) etc.The setting operation that right menu Right Menu provides cursor to follow the trail of for the user.For each operation steps that automatic cursor is followed the trail of being described and showing details, be specifically described as measured signal with the 1MHz square wave below, the specific implementation method is as follows.
1, cursor mode step is set:
Cam looks for shown in Figure 4, for the cursor mode in the right menu of Fig. 3 the interface synoptic diagram is set.Shown in Fig. 4 (a), originally illustrating provides three kinds of cursor modes: manual mode (Manual), tracking pattern (Track) and automatic mode (Auto).Wherein, automatic mode (Auto) is realized is automatic cursor tracking function of the present invention.Originally illustrate in the popup menu mode and show the spendable cursor mode of all users, and can select and arrange cursor mode by function button or the knob key of front panel.For example, the user can then, shown in Fig. 4 (b), use the knob key to choose " Auto " menu item at first by pressing function button Eject mode (Mode) choice menus of front panel.Last push-turn key key cursor mode is set to " Auto ".Shown in Fig. 4 (c), right menu is about to " Auto " pattern menu item and presents to the user after setting completed.Wherein, " Meas.Para " menu item is for showing optional cursor trace sources, and namely the traceable measurement item of cursor owing to current the setting measured item, therefore is shown as " None ", represents not have the traceable measurement item of cursor.
2, measure the step that arranges of item:
In originally illustrating, the user will set gradually the cycle (Period), positive pulsewidth (+Width), pre-dash (Preshoot), amplitude (Vamp), peak-to-peak value (Vpp) totally 5 measure.With reference to Fig. 3, in the left menu of display interface, select to arrange.The user at first chooses the cycle (Period) to measure item by pressing the front panel keys corresponding with the cycle (Period), discharges the front panel keys of pressing at last, and namely the execution cycle (Period) is measured the setting of item.With reference to Fig. 4, in the right menu in " Meas.Para " menu item the traceable measurement of cursor will be become " cycle (Period) " by " None ".
As a kind of example, in originally illustrating, when automatic cursor tracking function is opened, follow the trail of if carrying out cursor, the measurement item that namely exists cursor following the trail of, then corresponding measured value demonstration of measuring item can be with the highlighted demonstration of inverse mode.Can clearly indicate this measurement measurement item for current automatic cursor tracking by the measured value that will measure item is highlighted.
The present invention does not limit the sequencing of abovementioned steps 1 and step 2, in the specific implementation, can arrange earlier yet and measure item, and cursor mode is set again.
3, the traceable selection step of measuring item of cursor:
After the user arranged the measurement item, " Meas.Para " menu item can dynamically update the traceable measurement item of cursor, hereinafter to be referred as trace sources.As shown in Figure 5, the selective a plurality of measurements items to arrange in the menu list step display 2.In conjunction with Fig. 2, operating key 202 can be for button, also can be the knob key, and in originally illustrating, only 1 the time, the user can not utilize operating key 202 manually to select to trace sources; When trace sources had 2, the user can measure between the item at two by button and select; Trace sources is during more than 2, and the user can eject by pressing keys have a plurality of optional menu lists of measuring, and then uses the knob key to choose one from a plurality of measurement items, as trace sources.During concrete enforcement, can use button to press modes such as selection, the selection of knob key traversal or the direct selection of touch-screen, select to carry out the measurement item that cursor is followed the trail of.Accordingly, can use button to discharge, the knob key is pressed or touch-screen discharges modes such as touchs, indicate this measurements selected and its be set to trace sources, produce a measurement item selection information c corresponding with selected measurement item this moment.
As a kind of example, in originally illustrating, with reference to Fig. 2 and in conjunction with Fig. 5, operating key 202 according to the order of described menu list, switches to current adjacent of choosing with the measurement item of choosing and measures when every triggering one time.For example, under default situations, choose last to measure item, shown in Fig. 5 (a), the measurement item that acquiescence is chosen is peak-to-peak value (Vpp).When operating key 202 triggers, if the time that the user presses this control button during less than a preset time, as 2 seconds, then according to the order of described menu list, the measurement item of choosing is switched to current choose adjacent next measures on the item; When operating key 202 triggers, if the time that the user presses this control button during more than or equal to this preset time, then according to the order of described menu list, the measurement item of choosing is switched to current adjacent last of choosing measures on the item.Be understandable that in the menu list, order of each measurement item is end to end, adjacent last one of first measurement item is last measurement item, and adjacent next one of last measurement item is first measurement item.
As another kind of example, in originally illustrating, with reference to Fig. 2, operating key 202 is the knob key, and it according to the order of described menu list, switches to current adjacent of choosing with the measurement item of choosing and measure on the item when presetting angle of every rotation.For example, when the knob key whenever turns clockwise a presetting angle, order according to described menu list, the measurement item of choosing is switched to current choose adjacent next to be measured on the item, when the current measurement item of choosing is last, the knob key that turns clockwise again can switch to the measurement item of choosing first and measure.When the knob key whenever is rotated counterclockwise a presetting angle, order according to described menu list, the measurement item of choosing is switched to current adjacent last of choosing to be measured on the item, when the current measurement item of choosing is first, be rotated counterclockwise the knob key again, the measurement item of choosing can be switched to last and measure on the item.
For example, in originally illustrating, under the original state, the measurement item that acquiescence is chosen is peak-to-peak value (Vpp).As shown in Figure 6, follow the trail of display interface figure for the cursor to the peak-to-peak value (Vpp) of waveform L.At first, the Wave data of waveform L is measured, is obtained two Measured Boundary of peak-to-peak value (Vpp), wherein, with the maximum amplitude y1 of current Wave data as the coboundary, with the minimum amplitude y2 of current Wave data as lower boundary.Indicate the cursor M1 of a level according to coboundary y1; Indicate the cursor M2 of a level according to lower boundary y2.Be understandable that, when obtaining Measured Boundary, also can be at each measurement item of user's setting, obtain the measured value that each measures item, as shown in Figure 6, at P place, the viewing area of measured value, shown respectively cycle (Period), positive pulsewidth (+Width), the pre-measured value that dashes (Preshoot), amplitude (Vamp), peak-to-peak value (Vpp), because the measurement item of current tracking is peak-to-peak value, therefore, the measurement result of peak-to-peak value (Vpp) shows in the inverse mode.Because Wave data is dynamic change, oscillograph can take multiple measurements Wave data, whenever after carrying out one-shot measurement, the measured value that obtains can be dynamically updated the P place, viewing area that is shown in measured value, simultaneously, whenever after carrying out one-shot measurement, cursor M1 and cursor M2 also can indicate by dynamic following along with the variation of the Measured Boundary of peak-to-peak value.
Suppose that user's actual needs observes the Measured Boundary of positive pulsewidth, shown in Fig. 5 (b), utilize measurement item that control button 202 will choose by the peak-to-peak value (Vpp) of acquiescence switch to positive pulsewidth (+Width).As shown in Figure 7, follow the trail of display interface figure for the cursor to the positive pulsewidth of waveform L.At first, L measures at waveform, obtains two Measured Boundary of positive pulsewidth, wherein, obtains the rising edge of current Wave data first pulse from left to right, with the horizontal ordinate x1 at described rising edge width point midway place as left margin; Obtain an adjacent negative edge of described rising edge the right, with the horizontal ordinate x2 at this negative edge width point midway place as right margin.Indicate a vertical cursor N1 according to left margin x1; Indicate a vertical cursor N2 according to right margin x2.Simultaneously, apparent regional P place at measured value, respectively display cycle (Period), positive pulsewidth (+Width), the pre-measured value that dashes (Preshoot), amplitude (Vamp), peak-to-peak value (Vpp), since the measurement item of current tracking become positive pulsewidth (+Width), therefore, (+Width) measurement result shows in the inverse mode positive pulsewidth.
Need to prove that the cursor bar number that indicates Measured Boundary is corresponding with the measurement item, can be one, for example maximal value, minimum value; Can also be two, peak-to-peak value for example; Can also be four, rising edge time for example; Can also be three, as shown in Figure 7, except two vertical cursor N1 and N2 that indicate among Fig. 7, can also indicate the cursor of a level according to the ordinate at rising edge width point midway place.The bar of cursor several according to different measurement items and dispatch from the factory the configuration and decide.
Illustrate as one, in embodiments of the present invention, with reference to Fig. 2, operating key 202 can also be chosen described a plurality of measurement simultaneously, and produces one and measure Xiang Quanxuan information; The described measurement Xiang Quanxuan information of indicative control unit 203 foundations is obtained the Measured Boundary that each measures item, and indicates the cursor of correspondence at described display interface according to the Measured Boundary of each the measurement item that obtains.For example, the time of pressing operating key 202 just can be chosen all the measurement items in the described menu list when presetting compressing time above one simultaneously.Indicative control unit 203 obtains each Measured Boundary of measuring item and obtains the Measured Boundary that each measures item, and indicate cursor at display interface according to the measurement Xiang Quanxuan information that operating key 202 produces.
Illustrate as another, in embodiments of the present invention, operating key 202 can also choose described a plurality of certain that measure in the item several simultaneously, and generation and the selected corresponding measurement item selection information of item of measuring, indicative control unit 203 obtains correspondence according to a plurality of different measurement item selection information and measures the Measured Boundary of item and indicate cursor.
Owing to can indicate a plurality of Measured Boundary of measuring item simultaneously, in order to distinguish the cursor of different measuring item, as a kind of example, in originally illustrating, indicative control unit 203 indicates dissimilar cursors at the Measured Boundary of different measuring item at display interface.Concrete, at dissimilar measurement items, can indicate the cursor of different colours, perhaps indicate the cursor of different line images, for example, straight line, dotted lines, dotted line combination etc.The different measuring item can be preconfigured to fixing default relationship with the mapping relations of different cursor types, also can be according to user's demand by the User Defined setting.
By the present invention, the measurement characteristics that the user can the visual inspection measured signal, i.e. the measurement item that arranges of visual user indicates a Measured Boundary of measuring by cursor.Simultaneously, utilize operating key from a plurality of measurements items, to select one of them, and generation is selected information with a selected corresponding measurement item of measuring, indicative control unit is according to a described measurement selection information, on described display interface, indicate the corresponding Measured Boundary of measuring item with cursor, make the user in a plurality of visualization measurement items, to select, thereby make the cursor of sign follow the trail of switching in the Measured Boundary of different measuring item.And, by triggering operating key or rotation operating key, just can select the measurement item that cursor is followed the trail of, simple, convenient, need not as prior art, to reconfigure the measurement item.
More than to a kind of oscillograph with automatic cursor tracking function provided by the present invention, be described in detail, used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. the oscillograph with automatic cursor tracking function is used at a display interface, presents the Wave data that gets access to the waveform display mode, and it comprises:
Measuring unit is used for according to a plurality of measurements items that the user arranges described Wave data being taken multiple measurements, and obtains the Measured Boundary that each measures item;
It is characterized in that, also comprise:
Operating key is used for from one of them measurement item of described a plurality of measurements selection, and generation and a selected corresponding measurement item selection information of measuring;
Indicative control unit for according to a described measurement selection information, obtains the corresponding Measured Boundary of measuring item; And the Measured Boundary that foundation is obtained indicates cursor at described display interface.
2. oscillograph as claimed in claim 1 is characterized in that,
Described measuring unit also is used for each Measured Boundary of measuring of storage, and after every pair of described Wave data carries out one-shot measurement, the Measured Boundary of storing is upgraded;
Described indicative control unit obtains the corresponding Measured Boundary of measuring item for according to a described measurement selection information from the Measured Boundary of storing.
3. oscillograph as claimed in claim 1 is characterized in that,
Described display unit also is used for showing selective described a plurality of measurements items with the form of menu list.
4. oscillograph as claimed in claim 3 is characterized in that,
Described operating key is used for when every triggering one time, according to the order of described menu list, the measurement item of choosing is switched to current adjacent of choosing measure.
5. oscillograph as claimed in claim 3 is characterized in that,
Described operating key is the knob key, is used for when presetting angle of every rotation, according to the order of described menu list, the measurement item of choosing is switched to current adjacent of choosing measure on the item.
6. as each described oscillograph of claim 1～5, it is characterized in that,
Described operating key also is used for choosing simultaneously described a plurality of measurement item, and produces a measurement Xiang Quanxuan information;
Described indicative control unit is used for the described measurement Xiang Quanxuan information of foundation, obtains the Measured Boundary of each measurement item, and measures the Measured Boundary of item according to each that obtain at the cursor of described display interface sign correspondence.
7. oscillograph as claimed in claim 6 is characterized in that,
Described indicative control unit also is used for the Measured Boundary to the different measuring item, indicates dissimilar cursors at display interface.
8. oscillograph as claimed in claim 2 is characterized in that,
Every pair of described Wave data of described measuring unit carries out one-shot measurement, obtains the Measured Boundary that one of them is measured, afterwards the Measured Boundary of this measurements item of storing is upgraded.
9. oscillograph as claimed in claim 2 is characterized in that,
Every pair of described Wave data of described measuring unit carries out one-shot measurement, obtains the Measured Boundary that each is measured successively, and the Measured Boundary that each of storing is measured is all upgraded afterwards.
10. oscillograph as claimed in claim 2 is characterized in that,
Every pair of described Wave data of described measuring unit carries out one-shot measurement, obtains the Measured Boundary that each is measured synchronously, and the Measured Boundary that each of storing is measured is all upgraded afterwards.
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