I'm using a 100 MHz reference. How do I add the phase noise of the reference to the simulation?
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I'm using a 100 MHz reference. How do I add the phase noise of the reference to the simulation?
While I'm asking, is there a user guide for PLLatinum Sim?
Hello Charles,
You can set the feature level of PLLatinum sim to either intermediate or advanced. Then, from the Phase Noise page, there is a box for "OSC, PLL, and VCO Noise" which gives two options: either you can use metrics to infer the 1/f^3, 1/f^2, and floor regions by selecting "Use Metrics" and toggling "manual override" to enter noise at certain offsets, or you can select "Load Data" to import a trace data text file. The imported file should be a comma-separated list of frequency offsets and phase noise measurements, see the example attached.
100 -104.0602634 101.8009751 -104.4965525 103.6343854 -105.2621392 105.5008148 -105.6995381 107.4008583 -106.2064508 109.335121 -106.5346534 111.3042193 -106.9748847 113.3087806 -107.0001356 115.3494436 -106.820234 117.4268583 -107.1720106 119.5416868 -107.2895957 121.6946029 -106.6747136 123.8862924 -107.0336233 126.1174537 -107.3025718 128.3887977 -107.821734 130.701048 -107.9856623 133.0549413 -107.7175083 135.4512277 -108.1423724 137.8906706 -108.262182 140.3740473 -109.2459988 142.9021489 -109.2353548 145.4757811 -108.8527547 148.0957637 -108.9707547 150.7629316 -108.9439852 153.4781344 -109.1720068 156.2422375 -109.1952033 159.0561213 -109.507482 161.9206824 -109.8642461 164.8368336 -110.0315363 167.805504 -110.2441933 170.8276394 -109.829949 173.9042027 -109.8432663 177.0361741 -110.2807308 180.2245515 -110.5284422 183.4703509 -110.5305914 186.7746062 -110.3192531 190.1383704 -110.6262071 193.5627151 -111.2825134 197.0487315 -111.1002571 200.5975301 -110.3641072 204.2102417 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There isn't a user's guide for PLLatinum Sim per se, but you can click on the question marks next to various section headers for an in-depth explanation of most of the features and boxes:
Regards,