National-instruments Graphical User Interface Ultiboard Manuale Utente Pagina 186
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Chapter 6 PCB Calculators
© National Instruments Corporation 6-3 NI Ultiboard User Manual
Microstrip Equations
The equations used to perform the microstrip calculations are:
Z0 = 87/(sqrt(Er + 1.41)) * ln(5.98*H/(0.8*W+T))
Tpd = 58.35247*sqrt(Er+1.41)
C0 = Tpd/Z0
L0 = C0*Z0*Z0
Embedded Microstrip Trace Calculations
Complete the following steps to perform embedded microstrip trace
calculations:
1. Select Tools»PCB Transmission Line Calculator.
2. Select Embedded 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 Height (H1)—Refer to the figure below.
• Dielectric Thickness (H)—Refer to the figure below.
• Trace Thickness (T)—Refer to the figure below.
• Trace Width (W)—Refer to the figure below.
• Relative Permittivity (epsilon r)—Refer to the figure below.
4. Click Calculate. Results of the calculation appear in the Calculation
Results area. They also appear in the Results tab of the Spreadsheet
View.
5. Click Close to close the PCB Transmission Line Calculator.
- 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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