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ShalikaSingh - 20:06, Thursday 09 January 2025 (3872)Get code to link to this report
RF ckt with EOM

I measured the TF of ckt in Fig 1 with EOM. 

The TF obtained using Moku is in Fig 2 and Fig 3. I will need to use a tunable capacitor to match the resonant frequency to the desirable one. 

In any case, the circuit looks good now. The measurement has been taken with HV probe with attenuation factor of 10. Also the range on moku was 50Vp-p, which implies that there was 5x attenuation inside moku as well. (Attenuation using cable (10x = 20dB) + attenuation using Moku(5x = 13.9dB))

Fig 4 and Fig 5 is how circuit looks now. 

Images attached to this report
3872_20250109120305_screenshot20250109200227.png 3872_20250109120548_mokuopampeomtf20250109.png 3872_20250109120552_mokuopampeomzoomedtf20250109.png 3872_20250109121037_20250109201033.jpg 3872_20250109121048_20250109201029.jpg
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ShalikaSingh - 15:22, Friday 10 January 2025 (3875)

The TF of the 2nd EOM was also measured. It is shown in Fig 1 and zoomed in Fig 2. 

During measurement

Attenuation using cable (10x = 20dB) + attenuation using Moku(5x = 13.9dB)

There is a slight difference of 0.7kHz in the resonant frequency of both eom. This can be tuned using variable capacitor. 

Also the desired resonant frequency was at around 0.3MHz, during design. But now during measurement its at 0.17MHz.