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- The fractional tune is set with respect to the revolution frequency
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Higher order sidebands are supported by values > 1, but best results have been found for baseband, e.g. q < 0.5
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- The signal levels can be set individually, usually Y requires less power
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Use as low as possible levels such that th
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**Output**
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- Signal bursts are started upon positive trigger flank for the specified duration with a [delay of 1 to 3 ms (trigger jitter)](https://git.gsi.de/p.niedermayer/exciter/-/wikis/Lab-test/Delay#exciter-for-beam-energy-ramp-v01)
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| ... | ... | @@ -28,7 +29,3 @@ General notes: |
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Make sure the output for both X and Y is not overloaded (overload ratio shows the percentage in time during which the DAC is overloaded and should stay below 1%).
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## Remarks
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If possible (i.e. more than one bunch in the ring), the excitation and tune measurement should be performed at different sidebands.
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E.g. excite at q=0.2 and measure at q=0.8. This improves the accuracy of the measurement, as the coupling between excited and measured frequencies is solely via the beam. |
