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Display two area of a tran sim simultaneously?

kenc184

Supposing one is interested in looking at a signal at two disparate areas of a transient sim, such as an output on both a rising and falling edge of a stimulus signal.

Is it possible to have VIva display these two simultaneously?  For example, in a 2ms transient sim, to display 499us to 501us AND 1499us to 1501us with nothing in between?

If not, is it possible to open two viva windows, each displaying the above simulation times, and have both updated on every sim?

  • Dear kenc184,

    kenc184 said:
    Is it possible to have VIva display these two simultaneously?  For example, in a 2ms transient sim, to display 499us to 501us AND 1499us to 1501us with nothing in between?

    If I understood your question correctly, one possible method is outlined in the note at URL:

    https://www.dropbox.com/s/wlileo6ad1hy2ai/mutliple_views_of_waveform_in_viva_sml_082922v1p0.pdf?dl=0

    I only had time to outline this as a possibility and hope it is of some help. I've attached a text version of the short ocean script documented in the note. To use it as a model for you, load your simulation results and open your waveform of interest using, for example, the getData() command.

    Shawn

    Fullscreen plot_commands.txt Download 
    newWindow()
nand_out_p_norm = nand_out_p/vdda

window_size = 0.20n
center_time_1 = 0.50n
center_time_2 = 2.250n

sprintf(nand_out_p_1_label "nand_out_p about %.2f ns" center_time_1/1e-09)
sprintf(nand_out_p_2_label "nand_out_p about %.2f ns" center_time_2/1e-09)

nand_out_p_norm_clipped_1 = clip(nand_out_p_norm (center_time_1 - 0.50*window_size) (center_time_1 + 0.50*window_size))
nand_out_p_norm_clipped_2 = clip(nand_out_p_norm (center_time_2 - 0.50*window_size) (center_time_2 + 0.50*window_size))

sprintf( title_string2 "Example of Viewing Two Windowed Time Regions of a Waveform:  %.2f ns to %.2f ns and %.2f ns to %0.2f ns" (center_time_1 - 0.50*window_size)/1e-09 (center_time_1 + 0.50*window_size)/1e-09 (center_time_2 - 0.50*window_size)/1e-09 (center_time_2 + 0.50*window_size)/1e-09)

awvPlotWaveform(currentWindow() list(nand_out_p_norm_clipped_1 lshift(nand_out_p_norm_clipped_2 (center_time_2 - center_time_1 + window_size))) ?expr list(nand_out_p_1_label nand_out_p_2_label) ?color list("y2" "y1") ?stripNumber list(1 1) ?yaxisLabel list("V" "V") )

window = awvGetCurrentWindow()
numMajDiv_x = 10
awvSetXAxisMajorDivisions(window numMajDiv_x)
numMajDiv_y = 10
awvSetYAxisMajorDivisions(window 1 numMajDiv_y ?stripNumber 1)
awvDisplaySubwindowTitle( awvGetCurrentWindow() title_string2 )
awvSetOptionValue( "dateStamp" nil )

  • in reply to ShawnLogan

    Or if using ADE you could just have two output expressions with:

    clip(VT("/someSig") 499u 501u)
    clip(VT("/someSig") 1499u 1501u)

    That seems a little simpler...

    Andrew

  • in reply to Andrew Beckett

    Dear Andrew,

    Thank you for your comment! Your solution is indeed simpler. I was trying to make the process of creating a plot a bit more general with variables for a window size and two time regions about which the window is applied. I was not sure how general a solution kenc184 was looking to find.

    Nevertheless, thank your reading my comment and proposing a "simpler" alternative!

    Shawn

  • in reply to Andrew Beckett

    Thank you both Shawn and Andrew. You are very helpful, and so much faster than opening a support ticket!

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