Since you were using the boost to sum the two sine waves, you will most likely need to invert the sine wave on out 2 to achieve what you are after.

The output of out 2 is inverted by default by the boost wiring, so inverting the waveform for Out 2 by selecting the sine wave and using the invert tick box (not Follow Out 1) is required to keep both sine waves in phase.

Otherwise, the output of Out 2 will be a sine wave that is 180 degrees out of phase with Out 1. This will yield different results on your spectrum analyzer even if the frequency on Out 2 is different.

The alternative is to use Sine/Inverse+Sync and do your summation using Add F1 to F2. However, this will be limit your choice of Out 2's frequency to a multiple of Out 1.

I'll give you both methods so you can try both.

Method 1: Inverse+Sync + Add F1 to F2

Select Sinewave for Out 1, Select Inverse+Sync for Out 2.

Bottom left corner of the program, check and enable Add F1 to F2

Just above where it says F2 = F1 x 1 Hz 0 Phase, set X = to a value that will derive the frequency you wish to have on Out 2, relative to the frequency being used on Out 1.

Again this method requires that Out 2 be mathematically related to Out 1.

Method 2: Sine / Inverted Sine

Set Out 1 = Sinewave

Set Out 2 = Custom Waveform (4th from bottom). Specify Sine and check the invert waveform checkbox that follows the drop down list.

Set Out 2 = (Out 1 x #) + # - [checkbox] Hz to the value you wish to use.

Examples:

You can set Out 2 = (Out 1 x 11) + 0 - [unchecked] Hz to specify that Out 2 is 11 times the value of Out 1.

You can set Out 2 = (Out 1 x 0) + 17420 - [unchecked] Hz to specify that Out 2 is to be a static 17420 Hz regardless of what Out 1 is.

Hope this is enough information to get you going.

For more details, please check the link:

http://www.spooky2.com/forums/viewtopic.php?f=71&t=4821

# How do I get Spooky to add two sine waves? I tried putting one sine wave on each channel and looked at the result via the boost cable on my scope set to spectrum analyzer.

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