Timeline for Even harmonics from oscillator
Current License: CC BY-SA 4.0
13 events
| when toggle format | what | by | license | comment | |
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| Sep 17 at 20:36 | history | edited | toolic | CC BY-SA 4.0 |
deleted 53 characters in body
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| Sep 17 at 8:23 | review | Close votes | |||
| Sep 18 at 20:31 | |||||
| Sep 17 at 4:24 | answer | added | Tim Williams | timeline score: 1 | |
| Sep 17 at 4:24 | answer | added | Neil_UK | timeline score: 1 | |
| Sep 17 at 4:13 | answer | added | td127 | timeline score: 1 | |
| Sep 17 at 4:09 | comment | added | tobalt | don't focus on filtering your clock signal. Fix the 720 MHz layout resonance. There should be a loop or stub of the correct size near your oscillator | |
| Sep 17 at 1:54 | comment | added | Kevin White | Your odd harmonics are much higher in amplitude than the even ones. In the spectrum you show the 3rd harmonic is nearly 40 dB stronger than the 2nd harmonic. For a fully symmetric waveform the even harmonics should cancel out but any departure from symmetry will cause the even harmonics to become present. Ultimately the spectrum for a repeated impulse is a descending set of both odd and even harmonics with amplitude inversely proportional to harmonic number. | |
| Sep 17 at 1:26 | answer | added | Jasen Слава Україні | timeline score: 1 | |
| Sep 17 at 0:59 | comment | added | a360pilot | Your datasheet suggests that the LO output is not sinusoidal. Thus, even harmonics are expected even with a slight duty cycle error, which apparently this IC provides no correction for. | |
| Sep 17 at 0:07 | comment | added | qrk | What is the duty cycle of the waveform? | |
| Sep 17 at 0:03 | comment | added | rohmeooo | it would be helpful to see the radiated emissions plot -- so we may see if it is a narrow peak or maybe more broadband, as well as seeing other harmonics and how they play out. also, a schematic would help. | |
| Sep 16 at 23:59 | answer | added | rohmeooo | timeline score: 2 | |
| Sep 16 at 23:37 | history | asked | Peter | CC BY-SA 4.0 |