Simulating a microwave signal with variable frequency.

Posted on 2003-03-17
Medium Priority
Last Modified: 2010-05-03
I am new to VB and am trying to work out how to simulate a microwave signal between 8-12GHz. I Know how to assign the frequency to a scroll bar on the form but i am stuck with simulating the actual signal. I have to display a section of a wave 70mm long and I am not sure how to do this either. If you have any code that can aid me with this it would be most helpful.

regards Nick
Question by:nickclaridge
  • 2
LVL 11

Accepted Solution

supunr earned 180 total points
ID: 8156811
add a picture box to your project called picture1. and put this code to a button click event

Private Declare Sub Sleep Lib "kernel32" (ByVal dwMilliseconds As Long)

Private Sub Command1_Click()
    Dim i As Single
    Dim Frequency As Single
    Dim Period As Single
    Picture1.AutoRedraw = True
    For Frequency = 8 To 12 Step 0.1 ' GHz
        Picture1.Scale (-0.01, 1.5)-(5, -1.5)
        Picture1.Line (0, 0)-(10, 0)
        Picture1.Line (0, -1.5)-(0, 1.5)
        Picture1.CurrentX = 0
        Picture1.CurrentY = 0
        Period = 1# / Frequency
        For i = 0 To 5 Step 0.001
            Picture1.Line -(i, Sin(i / Period))
        Next i
        Sleep 200
    Next Frequency
End Sub

you should be able to figure out the rest.  Hope this is useful.

Good Luck!

Author Comment

ID: 8160419
This is very helpful. Thanks. However what modifications would I have to make in order to have the frequency no changing automatically but be dependant on the value corresponding to that of a scroll bar?

Author Comment

ID: 8205080
Thanks for your help.

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