DAP Technology 1394, Руководство по эксплуатации

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Symbol Recorder
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9.2. Time View
The Time View is one of the possible views in the Recorder which you can use to investigate the recorded
data. It displays all packets and symbols on a time line. The relative positions of the packets and symbols
correspond to the time the packet or symbol was recorded and the length of symbols and packets in the
view correspond to the actual duration of the items.
Per direction, the Time View shows
·
Annotation, Busreset events and Trigger position
· Symbols, Low level representation of symbols and toning seen on the connection
·
Packets, Higher level grouping of symbols that form packets
The cursor can be moved inside the Time View allowing for inspection of packets and symbols. When a
packet is selected, the PacketView will show the content of the packet.
9.2.1. How to use it
You can display/remove the Time View by checking/unchecking the Time View item in the View menu of
the Recorder. An example of the Time View is displayed below:
At the top of the view you see a toolbar with the buttons zoom in, zoom out, zoom fit and a relative time
button and the cursor time.
The time at the cursor position is displayed in the toolbar. It can display the absolute time or a relative
time. In absolute time mode, time 0 is defined as the left-most position in the time view. In relative mode
the displayed cursor time is relative to a reference time. This reference time is indicated in the Time View
as a vertical dotted line (see above). The reference time is set when switching from absolute to relative
mode, in which case the reference time will be set to the cursor time. Additional mouse clicks will move
the cursor, but not the reference. This makes time measurements very easy. To measure the time
between the start of a request packet and the start of its response packet for instance, select the request
packet, switch to relative mode and select the response packet. The time between them will be displayed
in the toolbar. Note that the selection of the packets can also be done in one of the other views of the
Recorder.
The cursor will snap to a symbol transition when the mouse is close enough.
9.2.2. Details
9.2.2.1. Toolbar
The Toolbar has the following indicators and buttons:
Zoom in
With this button you can zoom in. You will see more details of the symbols.
Zoom out
With this button you can zoom out. You will see fewer details of the symbols.