Packet Error Rate - Scroll Bar

The PER Stats Scroll Bar displays stats for all packets, divided into equal time intervals.

• Captured data begins to appear on the left and fills the width of the bar, left to right.
• The vertical bars in the Scroll Bar each indicate a fixed duration.  When data first appears in the Scroll Bar as it is being captured, each bar equals one second. When the data fills the bar, reaching the right side limit, the last bar moves back to the center of the Scroll Bar.  The bars stay the same size, but doubles in duration (for example, the first time the Scroll Bar fills, the bars return to the middle, but now each bar represent two seconds of time instead of one).  Each time the bars cycle to the middle, the time they represent doubles. When the bars move and the Viewport (see below) is not maximized, the Viewport moves with the bars so that the same packet range is indicated. When the Viewport is maximized it stays maximized regardless of what the bars do. This ensures that the display can be made to reflect all packets at all times by maximizing the .

• The Viewport  is used to select single or multiple vertical bars .
  

• You can drag the sides of the Viewport or the slider buttons to select multiple bars, representing a greater time range.  
  
• You can click and drag the Viewport within the Scroll Bar.
  
• When you select a packet range in Frame Display that includes only some of the frames in PER Stats, the Viewport snaps up against the side of the bar with the unselected frames .
•  When you select a packet range in Frame Display that includes all of the frames in PER Stats, the Viewport displays a space between the Viewport sides and the bar .

• Double clicking anywhere inside the Scroll Bar selects the entire Scroll Bar.  Double clicking again toggles back to the previous size of the Viewport.
  
• Selecting Ctrl+A is the same as double-clicking.
  
• Clicking on a vertical bar left justifies the Viewport to that bar.
  
• Shift-clicking on a bar extends the nearest Viewport side to include that bar.  

• The Home key moves the Viewport to the left edge.
  
• The End key moves the Viewport to the right edge.
  
• Pressing the left arrow button ,  the left arrow key, or the up arrow key moves the Viewport to the left, one vertical bar at a time.
  
• Pressing the right arrow button . the right arrow key, or the down arrow key moves the Viewport to the right, one vertical bar at a time.
  
• Pressing the double left arrow button or the PgUp key moves the Viewport to the left by the current width of the Viewport.  Holding down the Shift key will prevent the Viewport from moving if there is not enough room to move by its full width.
  
• Pressing the double right arrow button or the PgDn key moves the Viewport to the right by the current width of the Viewport. Holding down the Shift key will prevent the Viewport from moving if there is not enough room to move by its full width.
  
• Holding the Shift key down and the right or left arrows moves the right side of the Viewport. 
• Holding the Ctrl key down and the right or left arrows moves the left side of the Viewport.
  

• The Scroll bar includes inapplicable packets (sniffer debug, WiFi, etc) so that the packet range selected in Frame Display can be shown. Inapplicable packets are not, however, included in the statistics reports.
   
• If the Viewport is adjusted within PER Stats, as opposed to selecting a packet range in Frame Display, it uses only whole bars on both sides.
  

• Statistics are retained for all packets regardless of whether any of those packets have wrapped out. You can select the Reset button , which is located above the right portion of the Scroll Bar,  to discard all stats for packets received up to that point.
  
• The Reset button is only available when you are capturing data.