Abstract:
A method of attaching measurement data to an area map on the display of a test instrument includes importing a map for display covering a desired spatial region. Appropriate points of interest are overlaid on the map. A user selects measurement data to be attached to the map and, upon selection such as by “tapping” a touch sensitive screen, a measurement icon is positioned on the map where the selected measurement data was acquired. A thumbnail of the selected measurement data is overlaid on the measurement icon to show both the type of measurement and actual measurement results. Also indicia of quality/strength for the measured signal may be tagged to the measurement icon, such as by changing the color of the border of the measurement icon accordingly. A direction arrow may also be associated with the measurement icon to indicate an orientation of the test instrument when the measurement data was selected.

Description:
BACKGROUND OF THE INVENTION  
       [0001]     The present invention relates to the displaying of measurement data, and more particularly to the attaching of measurement data to an area map to show the spatial location where each measurement was taken.  
         [0002]     In the wireless telecommunications industry it is important for network operators to have a view of the network from the aspect of the subscriber. For example the Andrew® Invex3G® wireless coverage testing system (http://www.andrew.com/products/measurement_sys/interp_intro.aspx) plots on a geographic map of a region the quality of service in the form of a series of colored dots, the color representing the quality level at each measurement location as a user drives around the region. The measurement is taken using a conventional handset and accompanying processing hardware.  
         [0003]     Likewise Summitek Instruments provides personal computer (PC) application software for spectrum monitoring and interference analysis (OASIS) (http://www.summitekinstruments.com/oasis/docs/OASIS%20Jan05.pdf) which determines what radio frequency (RF) transmissions are present at a user&#39;s site, associates the emissions with a license and views the location of the identified emitter relative to the user&#39;s site on a geographical map. The geographical map also may indicate locations where measurements are taken. However, no measurements are associated with the identified emitter or measurement locations on the geographical map.  
         [0004]     U.S. Pat. No. 6,906,643 describes how “path-enhanced” multimedia (PEM) data may be displayed, particularly on a “mapped-based view”. The view includes iconic representations corresponding to multimedia recorded during a vacationeer&#39;s trip overlaid on a map of the region visited. The vacationeer&#39;s path through the region is shown and icons along the path corresponding to video, sound and photo are shown at the points where they were recorded. The recorded media can then be played back by “clicking” on a particular icon. The icon only represents the type of data recorded at the indicated points, and does not “show” a portion of what was actually recorded.  
         [0005]     U.S. Pat. No. 6,741,790 provides for recording of GPS (Global Positioning System) data on the same medium as images are recorded by a video recording device. The device may then be connected to a computer where a geographic map is presented with an index representing each location recorded on the recording medium. Then any location may be selected and the images recorded at that location are played back by the video recording device. Again the data at each location is not known until it is activated.  
         [0006]     For field measurement applications a user would like to know the spatial location of each measurement, what type of measurement data is recorded at each location, what the data is and what the quality/strength of the signal represented by the measurement data is, all from a single display.  
       BRIEF SUMMARY OF THE INVENTION  
       [0007]     Accordingly embodiments of the present invention provide a method of attaching measurement data to an area map. A map mode and a measurement mode are selected. The area map for a desired region, either geographic, plat, floor plan or the like, is imported for display and points of interest, such as known signal emitters, are overlaid on the area map in the form of appropriate icons. When a user wishes to attach a measurement result to the area map, the user “taps” the screen and the measurement result is attached to the area map at the measurement location in the form of a measurement icon. The measurement icon is overlaid with a thumbnail of the actual measurement results and is tagged as to the quality/strength of the measured signal, such as by altering the color of the border of the measurement icon. In this way the user generates a display of measured results as spatially related to the desired region that shows type, actual data and quality/strength of the signal measured. Details of the measurement data at each location may be displayed by appropriately selecting the measurement icon at such location. Also, where desired, the direction in which the measurement is taken, i.e., orientation of the receiving antenna, may also be attached to each measurement icon.  
         [0008]     The objects, advantages and other novel features of the present invention are apparent from the following detailed description when read in conjunction with the appended claims and attached drawing. 
     
    
     BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING  
       [0009]      FIG. 1  is a block diagram view of an instrument for attaching measurement data to an area map according to the present invention.  
         [0010]      FIG. 2  is a display plan view of an area map with attached measurement data according to the present invention.  
         [0011]      FIG. 3  is a display plan view of detailed measurement results associated with attached measurement data according to the present invention.  
         [0012]      FIGS. 4   a - 4   d  are state diagram views related to attaching measurement data to an area map according to the present invention. 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0013]     Referring now to  FIG. 1 a  representative test instrument  10  is shown, such as the standalone, portable handheld Y400 NetTek® Analyzer with a YBT250 test module manufactured by Tektronix, Inc. of Beaverton, Oreg. An antenna  12  intercepts a signal which is input to an acquisition system  14 . The acquisition system  14  provides pre-processing and digitization to produce a digital signal representative of the intercepted signal. The digital signal is provided to a digital signal processor (DSP)  16 . The DSP  16  is connected to a digital bus  18  for communication with a main frame  20 . The test module may be any type of test module, such as a spectrum analysis module, a demodulated measurements module and the like. The demodulated measurements module may include a PN code scanner, a code domain power processor, etc. The DSP  16  performs signal demodulation, makes measurements on the demodulated signal and generates responses to received commands. Commands from the main frame  20  are provided to the DSP  16  also over the digital bus  18 . The DSP  16  may be implemented in many different ways, as is well known in the art, such as via a dedicated processor, an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), a central processing unit (CPU) or the like. The test module may be a replaceable module, i.e., a particular module is mounted on the test instrument  10  according to the measurement desired as shown. Alternatively the test module may have the capability to perform multiple different measurements according to programs loaded into the DSP  16  from the main frame  20  over the digital bus  18 . The particular measurement output to be processed by the main frame  20  is selected by a user via a graphics user interface (GUI). The selected measurement determines specified measurement criteria to be applied to the intercepted signal. A display  22 , which may be part of the main frame  20 , may provide the GUI, such as by having a touch sensitive screen or the like. Alternatively the housing for the test instrument  10  may include pushbuttons, switches, knobs and the like as the input/output interface.  
         [0014]     As shown in  FIG. 1  the main frame  20  interfaces with the DSP  16  via a measurement client (MC) module  24  which in turn interacts with an information state data base (ISDB)  26 . The ISDB  26  is a collection of software objects derived from a common base class. All data is stored on the ISDB  26  from whatever source. The ISDB  26  interacts with a measurements program module  28 , a map module  30 , a remote interface module  32  for communication over a network, such as TCP/IP, and a storage module  34  for storing/retrieving permanent data. The MC module  24  receives measurement data from the DSP  16  and transmits commands to the DSP for configuration settings. The MC module  24  transfers received measurement data to the ISDB  26  and extracts commands for transmission to the DSP  16  from the ISDB. The ISDB  26  interacts with the measurements program module  28  for display processing of measurement results for presentation on the display  22 . The ISDB  26  interacts with the map module  30  for importing and manipulating a selected map, which is then used by the display module  22  for presentation of the measurement results, as described below. The remote interface module  32  interacts with the ISDB  26  for providing remote commands, downloading information from an external source to the ISDB for use in one of the other modules  22 ,  28 ,  30 , etc. Finally the ISDB  26  interacts with the storage module  34  for saving information and/or retrieving information as determined by the other modules.  
         [0015]     A representative display for the test instrument  10  is shown in  FIG. 2  where a softscreen display  42  is shown having typical tool/information bars  44  at the top, an I/O interface  46  on along the right and bottom and a results window  48 . An area map is shown in the results window  48  when a map view icon  49  in the I/O interface  46  is activated—this particular map being a geographic map although a plat map, a building floor plan or other type of area map may be used. The I/O interface  46  includes measurement “buttons”  50  that are representative views of measurements that may be made by the test instrument  10 . For purposes of illustration a current measurement button  51  is selected for a spectrum analysis of the intercepted signal. Emitter icons  52  may be overlaid on the map at a location representing each known signal emitter. The emitter icons  52  may include a photo representation of the emitter or an iconic representation as shown. Also shown overlaid on the map are measurement icons  54  where actual measurements are taken. The measurement icons  54  are in the form of representations of actual measurements taken at the locations indicated, i.e., a noise floor figure, a spectrum analysis measurement thumbnail, code domain power, etc.  
         [0016]     The placement of the measurement icons  54  on the map in the results window  48  may be achieved either by tapping the screen at the location of the measurement within the results window or by tapping the screen anywhere within the results window and letting a GPS positioning algorithm as part of the map module  30  correlate the current position of the test instrument  10  with a location on the map and placing the measurement icon at the GPS location. Alternatively the positioning of the measurement icons  54  may be based on other criteria, such as a desired distance or time relationship between measurements once the measurement process is started, again such as by tapping the screen within the results window  48  to indicate the start of the measurement process.  
         [0017]     The test instrument  10  begins to make measurements according to the button  50  selected and a miniature readout window  59  within the I/O interface  46  shows the current measurement results. The known signal emitters  52  or other points of interest (POI) icons are overlaid on the map with a symbol representing the type of POI, and a current position icon  60  may also be overlaid on the map showing where the test instrument  10  is spatially with respect to the map. The test instrument  10  overlays a thumbnail  61  of the measurement results on the map as a measurement icon  54 , either at a location determined by GPS (if available) or at a manually specified location as described above. The thumbnail indicates the type of measurement—spectrum traces resemble tiny spectrum analyzer screenshots, code domain power results resemble tiny bar graphs, etc. In fact the thumbnails may actually indicate the contents of the data, i.e., each spectrum thumbnail is a miniature version of the actual trace captured by the test instrument  10 . Therefore the screenshot for each spectrum thumbnail is unique, and “clicking” on the thumbnail launches a full-screen window as shown in  FIG. 3  presenting the full results in greater detail.  
         [0018]     Some measurements have user-specified pass/fail criteria (max/min limits, spectrum masks, etc.) associated with them. The measurement icons  54  may be tagged with some indicia, such as by coloring or shading of the border, overlaying a miniature icon, etc., to indicate the “good”, “bad” or “marginal” status of the data. The tagging may also be used to indicate strength or other characteristics of the signal being measured. Although not readily apparent in black and white, one measurement icon  54  may have a red border indicating failure of a specified criteria while another measurement icon may have a green border indicating meeting of the specified criteria. Yet another measurement icon  54  may have a yellow border indicating that the specified criteria are marginally met, i.e., in a region close to failing. In the spectrum analysis measurement this may indicate, for example, whether the signal has or has not violated a user-specified frequency mask or is close to violating the user-specified frequency mask. Further the border or miniature icon may be altered to indicate that the user has moved the measurement icon  54  from its measurement location for some reason, such as by providing cross-hatching for the border. Each measurement icon  54  is treated as a separate software object, and so may be moved by the user by interacting with the test instrument  10 . The measurement icon  54  may subsequently be moved back to its original location on the map since the measurement location is permanently associated with the measurement icon, i.e., when the measurement icon is originally located on the map that position is permanently affixed to the measurement icon while a current position value may be altered when the icon is moved by the user.  
         [0019]     Some measurements, such as for location of interfering emitters, may depend on the orientation of the antenna  12  for the test instrument  10 . The user may then specify the direction in which the measurement was made by attaching a directional arrow  69  to the measurement icon  54 . From the specified directions of two or more measurement locations the location of an interfering emitter may be located on the area map.  
         [0020]     As shown in  FIG. 4   a  a “tap” on a measurement button  50  causes the test instrument  10  to enter an active measurement mode. A further tap also serves to select the particular measurement and, when the tap is on the area map  48 , may simultaneously, as described above, then serve to commit the selected measurement to the area map. A tap on a compass pointer button  53  causes the test instrument to enter a directional pointer mode, as shown in  FIG. 4   b . A tap on one of the measurement icons  54  selects that map measurement, and then a drag from the measurement icon in the appropriate direction applies the directional arrow  69  to the measurement icon. According to  FIG. 4   c  a tap on a repeat button  55  causes the test instrument to enter a periodic measurement mode. A tap then starts the periodic measurements, and a further tap stops the periodic measurements.  
         [0021]      FIG. 4   d  further illustrates that a tap on a pointer button  57  causes the test instrument  10  to enter a pointer mode which allows several actions to be taken, including “homing” the map, dragging the map, moving one of the measurement icons, viewing transmitter details, replacing the map mode with a measurement screen ( FIG. 3 ), viewing a list of measurements taken at a particular location including selecting a specified one of the measurements for manipulation, etc.  
         [0022]     Thus the present invention provides a method of attaching measurement data to an area map so as to indicate, where appropriate, the measurement type, actual measurement results and quality/strength of the measured signal.