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# Simulating a microwave signal with variable frequency.

Posted on 2003-03-17
Medium Priority
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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
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Question by:nickclaridge
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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

Do
For Frequency = 8 To 12 Step 0.1 ' GHz

Picture1.Cls
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
DoEvents
Sleep 200
Next Frequency
DoEvents
Loop
End Sub

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

Good Luck!
0

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?
0

Author Comment

ID: 8205080
Thanks for your help.
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