In the Simulation Waveform Editor, choose Simulation Settings Simulation Options and delete -novopt following vsim in the Model Script (and save the changes). Preview file 51 KB. A Function Generator or sometimes called a Waveform Generator is a device or circuit that produces a variety of different waveforms at a desired frequency. It can generate Sine waves, Square waves, Triangular and Sawtooth waveforms as well as other types of output waveforms. Level Scale options. Allow you to select whether the level is shown as percentage or in dB. Shows the project tempo grid. Shows the waveform image of the selected audio. Half Level Axis. To show the half level axis, open the audio waveform context menu and select.
Keyword | Data Type | Default Value | Description |
abstol | Num. | 1pA | Absolute current error tolerance |
baudrate | Num. | (none) | Used for eye diagrams. Tells the waveform viewer how to wrap the abscissa time to overlay the bit transitions. |
chgtol | Num. | 10fC | Absolute charge tolerance |
cshunt | Num. | 0. | Optional capacitance added from every node to ground |
cshuntintern | Num. | cshunt | Optional capacitance added from every device internal node to ground. |
defad | Num. | 0. | Default MOS drain diffusion area |
defas | Num. | 0. | Default MOS source diffusion area |
defl | Num. | 100µm | Default MOS channel length |
defw | Num. | 100µm | Default MOS channel width |
delay | Num. | 0. | Used for eye diagrams. Shifts the bit transitions in the diagram. |
fastaccess | flag | false | Convert to fastaccess file format at end of simulation. |
flagloads | flag | false | Flags external current sources as loads. |
Gmin | Num. | 1e-12 | Conductance added to every PN junction to aid convergence. |
gminsteps | Num. | 25 | Set to zero to prevent gminstepping for the initial DC solution. |
gshunt | Num. | 0. | Optional conductance added from every node to ground. |
itl1 | Num. | 100 | DC iteration count limit. |
itl2 | Num. | 50 | DC transfer curve iteration count limit. |
itl4 | Num. | 10 | Transient analysis time point iteration count limit |
itl6 | Num. | 25 | Set to zero to prevent source stepping for the initial DC solution. |
srcsteps | Num. | 25 | Alternative name for itl6. |
maxclocks | Num. | Infin. | maximum number of clock cycles to save |
maxstep | Num. | Infin. | Maximum step size for transient analysis |
meascplxfmt | string | bode | Complex number format of .meas statement results. One of 'polar', 'cartesian', or 'bode'. |
measdgt | Num. | 6 | Number of significant figures used for .measure statement output. |
method | string | trap | Numerical integration method, either trapezoidal or Gear |
minclocks | Num. | 10 | minimum number of clock cycles to save |
MinDeltaGmin | Num. | 1e-4 | Sets a limit for termination of adaptive gmin stepping. |
nomarch | flag | false | Do not plot marching waveforms |
noopiter | flag | false | Go directly to gmin stepping. |
numdgt | Num. | 6 | Historically 'numdgt' was used to set the number of significant figures used for output data. In LTspice, if 'numdgt' is set to be > 6, double precision is used for dependent variable data. |
pivrel | Num. | 1e-3 | Relative ratio between the largest column entry and an acceptable pivot value. |
pivtol | Num. | 1e-13 | Absolute minimum value for a matrix entry to be accepted as a pivot. |
reltol | Num. | .001 | Relative error tolerance. |
srcstepmethod | Num. | 0 | Which source stepping algorithm to start with. |
sstol | Num. | .001 | Relative error for steady-state detection. |
startclocks | Num. | 5 | Number of clock cycles to wait before looking for steady state. |
temp | Num. | 27ºC | Default temperature for circuit element instances that don't specify temperature. |
tnom | Num. | 27ºC | Default temperature at which device parameters were measured for models that don't specify this temperature. |
topologycheck | Num. | 1 | Set to zero to skip check for floating nodes, loops of voltage sources, and non-physical transformer winding topology |
trtol | Num. | 1.0 | Set the transient error tolerance. This parameter is an estimate of the factor by which the actual truncation error is overestimated. |
trytocompact | Num. | 1 | When non-zero, the simulator tries to condense LTRA transmission lines' history of input voltages and currents. |
vntol | Num. | 1µV | Sets the absolute voltage error tolerance. |
plotreltol | Num. | .0025 | Sets the relative error tolerance for waveform compression. |
plotvntol | Num. | 10µV | Sets the absolute voltage error tolerance for waveform compression. |
plotabstol | Num. | 1nA | Sets the absolute current error tolerance for waveform compression. |
plotwinsize | Num. | 300 | Number of data points to compress in one window. Set to zero to disable compression. |
ptrantau | Num. | .1 | Characteristic source start-up time for a damped pseudo transient analysis to find the operating point. Set to zero to disable pseudo transient. |
ptranmax | Num. | 0 | If set non-zero, that time of the damped pseudo transient analysis is used as the operating point whether the circuit has settled or not. |
Elliott Wave Options Rob Roy
Reliable and resilient communications are paramount to so many components of today’s battlespace: mission readiness, soldier lethality, security, and the list goes on and on. To account for an increasingly contested and congested battlespace, waveform modernization is critical for today’s warfighter and the way we use them in-theater must evolve.
A new whitepaper from The Modern Battlespace titled “Examining Waveform Options for Today’s Warfighter” delves into a few different areas around waveform modernization, including how it helps in the overall effort to get warfighters the communications capabilities that they need.
“Over the coming months and years, we will witness the migration to a more open system approach that will, if done correctly, lead to the ability to agilely scale and grow capabilities from multiple industry sources to ensure our military continues to have that force multiplier found in reliable and resilient communications,” explains Joseph Graf, fellow at Collins Aerospace, in the whitepaper’s foreword.
This whitepaper looks at the following areas of need for military waveform modernization:
- The advantage of utilizing barrage relay networking (BRN) when using the MANET waveform, as exemplified in a partnership between Collins Aerospace and Trellisware.
- A comprehensive comparison of the SATURN and HAVEQUICK waveforms and how SATURN builds on the HAVEQUICK program to create a more robust offering for today’s warfighter.
- An overview of the existing waveform landscape and how the industry and defense communities are working together to keep pace with warfighter needs and expectations with solutions like software defined radios.
To learn more about waveform modernization in-theater, you can download the entire whitepaper here.
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