National-instruments Graphical User Interface Ultiboard Uživatelský manuál Strana 191
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Hodnocené. / 5. Na základě hodnocení zákazníků
Chapter 6 PCB Calculators
NI Ultiboard User Manual 6-8 ni.com
You can use the PCB Differential Impedance Calculator to calculate the
following parameters for differential pairs:
• Characteristic Impedance (Zo).
• Per unit length Capacitance (Co).
• Per unit length Inductance (Lo).
• Propogation Delay (tpd).
• Differential Impedance (Zdiff).
The PCB Differential Impedance Calculator supports:
• Microstrip Calculations.
• Embedded Microstrip Calculations.
• Centered Stripline Calculations.
• Asymmetric Stripline Calculations.
Microstrip Calculations
Complete the following steps to perform microstrip differential impedance
calculations:
1. Select Tools»PCB Differential Impedance Calculator.
2. Select Microstrip in the Type drop-down list.
3. In the Input Data area, edit the following fields as desired:
• Input Length Unit—Select mils or millimeters.
• Dielectric Thickness (H)—Refer to the figure below.
• Trace Thickness (T)—Refer to the figure below.
• Trace Width (W)—Refer to the figure below.
• Trace Spacing (S)—Refer to the figure below.
• Relative Permittivity (epsilon r)—Refer to the figure below.
Or
If you wish to define the Characteristic Impedance (Zo) yourself, click
User Defined Zo and edit the following fields as desired:
• Input Length Unit—Select mils or millimeters.
• Dielectric Thickness (H)—Refer to the figure below.
• Trace Spacing (S)—Refer to the figure below.
• Characteristic Impedance (Zo)—Refer to the figure below.
- NI Ultiboard 1
- Important Information 3
- Conventions 5
- Chapter 2 7
- Chapter 3 7
- Setting Up a Design 7
- Chapter 4 8
- Working with Parts 8
- Chapter 5 9
- Contents 10
- Chapter 6 11
- PCB Calculators 11
- Chapter 7 11
- Autorouting and Autoplacement 11
- Appendix A 13
- Menus and Commands 13
- User Interface 17
- Chapter 1 User Interface 18
- View Toolbar 19
- Main Toolbar 20
- Select Toolbar 21
- Draw Settings Toolbar 22
- Edit Toolbar 23
- Align Toolbar 24
- Place Toolbar 25
- Wizard Toolbar 28
- Autoroute Toolbar 28
- Setting Preferences 29
- Paths Tab 30
- Colors Tab 31
- PCB Design Tab 31
- Dimensions Tab 34
- 3D Options Tab 35
- Setting PCB Properties 36
- Copper Layers Tab 37
- Pads/Vias Tab 38
- Microvias 39
- General Layers Tab 40
- Design Rules Tab 41
- Setting Favorite Layers 42
- Design Toolbox 43
- Birds Eye View 44
- Spreadsheet View 45
- Spreadsheet View: DRC Tab 46
- Filter Manager 47
- Spreadsheet View: Parts Tab 49
- Spreadsheet View: Nets Tab 51
- Spreadsheet View: Vias Tab 58
- Customizing the Interface 62
- Commands Tab 63
- Toolbars Tab 63
- Keyboard Tab 64
- Menu Tab 64
- Options Tab 65
- Beginning a Design 66
- Creating a Design 67
- Chapter 2 Beginning a Design 68
- Working with Projects 69
- Opening an Existing File 70
- Saving and Closing 70
- Loading Technology Files 71
- Using Selection Filters 72
- Place and Select Modes 73
- Using the Full Screen 74
- Refreshing the Design 76
- Tool-tip Label 76
- Chapter 3 Setting Up a Design 78
- Accessing Layers 79
- Using the Board Wizard 83
- Enter coordinate dialog box 85
- Design Rule Errors 86
- Add Group dialog box 87
- Working with Net Groups 88
- Working with Part Groups 89
- Working with Bus Groups 91
- Net Group Settings 95
- Part Group Settings 95
- Differential Pair Settings 96
- Chapter 4 Working with Parts 100
- Working with Ratsnests 101
- Working with Force Vectors 102
- Dragging Parts 103
- Shoving Parts 103
- Using Ruler Bars and Guides 106
- Aligning Shapes and Parts 107
- Orienting Parts 107
- Spacing Shapes and Parts 108
- Placing a Group Array Box 108
- Replicating a Group 110
- Unplacing Parts 111
- Attributes 111
- and End Offset values 115
- Placing Other Elements 116
- Placing Holes 117
- Placing Shapes and Graphics 117
- Working with Jumpers 119
- Placing Jumpers 119
- Working with Test Points 120
- Placing Test Points 120
- Working with Dimensions 121
- Placing Dimensions 121
- Editing Parts and Shapes 125
- Editing a Polygon 126
- Locating a Part in a Design 130
- Cross-probing 131
- Creating New Parts 131
- OK. The Edit mode window 132
- Managing the Database 137
- Adding Parts to the Database 140
- Command 141
- Merging Databases 142
- Converting Databases 143
- Placing Traces 145
- Working with Traces 146
- or Narrow 147
- or Narrow multiple times 147
- SC> or by right-clicking 148
- Placing a Bus 149
- Working with Density Bars 150
- Equi-Spacing Traces 153
- Deleting a Trace 153
- Placing Copper Areas 154
- Placing Powerplanes 155
- Splitting Copper 155
- Deleting All Copper 156
- Working with Vias 159
- , Layer 160
- Placing SMD Fanouts 162
- Working with Nets 163
- Using the Netlist Editor 164
- Adding a Net 165
- Renaming a Net 169
- Deleting a Net 169
- Deleting a Pin from a Net 170
- Setting Net Widths 170
- Setting Group Parameters 171
- Setting Via Parameters 172
- Highlighting a Net 172
- Shielding Nets 172
- Net Bridges 174
- Creating a Net Bridge 174
- 9. Click OK 175
- Placing a Net Bridge 176
- Copying a Copper Route 177
- Swapping Pins and Gates 178
- Swapping Gates 179
- Automatic Pin/Gate Swapping 182
- Real-Time Pin/Gate Swapping 183
- Microstrip Trace Calculations 185
- Microstrip Equations 186
- Embedded Microstrip Equations 187
- Centered Stripline Equations 188
- —Select mils or millimeters 189
- Dual Stripline Equations 190
- Microstrip Calculations 191
- Chapter 6 PCB Calculators 192
- Autoplacement of Parts 199
- Running the Autoplacer 200
- Controlling the Autoplacer 200
- Autorouting 203
- Router Preprocessing 204
- Initial Routing 204
- Rip-up and Retry Routing 204
- Optimization 205
- Running the Autorouter 205
- Interactivity 206
- Autorouting buses 206
- area and 207
- Routing Options: General Tab 208
- Routing Options: Rip-Up Tab 211
- or Star 213
- area. Click 213
- Preparing for 215
- Manufacturing/Assembly 215
- Capturing Screen Area 216
- Placing a Comment 217
- Renumbering Parts 219
- Backannotation to Multisim 220
- Mitering Corners 220
- Cleaning up the Board 222
- Exporting a File 222
- Using Export Settings 223
- Setting Gerber Properties 224
- Setting DXF Properties 225
- Setting NC Drill Properties 225
- Working with SVG Properties 225
- Working with other Properties 226
- Printing your Design 228
- Viewing Designs in 3D 231
- Manipulating the 3D View 232
- Showing an Object’s Height 234
- Internal View 234
- Exporting to 3D DXF 235
- Exporting to 3D IGES 236
- Using Mechanical CAD 237
- Importing a DXF File 239
- dialog box 240
- if you would like to 240
- Appendix A Menus and Commands 243
- Edit Menu 244
- Edit»Selection Filter 247
- Edit»Orientation 247
- Edit»Align 247
- Edit»Vertex 248
- Edit»In-Place Part Edit 248
- Edit»Properties 248
- View Menu 249
- Place Menu 251
- Place»Follow-me 252
- Place»Connection Machine 252
- Place»Shape 252
- Place»Dimension 252
- Place»Graphic»Line 252
- Design Menu 255
- Tools Menu 258
- Options Menu 261
- Autoroute Menu 261
- Window Menu 261
- Help Menu 262
- Context Menus 263
- Right-drag Menu 265
- Place Trace Menu 265
- Archiving Data 266
- Appendix B Archiving Data 267
- Instruments\10.1\config\ 268
- Technical Support and 269
- Professional Services 269
- Glossary 271
- Numerics 275
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