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Message ID: 22
Entry time: Sun Dec 6 13:20:52 2009
In reply to: 21
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| Author: |
Frank |
| Type: |
Electronics |
| Category: |
VCO |
| Subject: |
VCO tuning |
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measured frequency tuning vs wideband input of VCO for calibration of measured spectra. graph coming soon...
Rana: measured spectra? Has there actually been a beat frequency measured after all these years???
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no, i mean i re-measured the slope of the frequency modulation input of the VCO with a lot more points. The coefficient (MHz/V) changes a lot over the input range from -5V to 5V (internal gain of 2). We need this to calibrate the spectrum of the feedback-signal (into the VCO) for the 2nd cavity.
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