Hi Guys,
Appreciate if you guys manage to clear my doubts. Anyway, just for your guys information, i am doing power sensor products. Below is my doubts.
1. What is RF ripple?
2. How this RF ripple will affect the measurement?
3. What cause the RF ripple occur?
4. How to eliminate RF ripple?
Below is my understanding of flatness, please correct me if i am wrong. Thank you.
1. What is Flatness?
IF amplitude flatness would act as a frequency discriminator and convert frequency changes into amplitude errors.
2. How this flatness will affect the measurement?
convert frequency changes into amplitude errors.
3. What cause the flatness happened?
[u]due to SWR across any 10 MHz span, the contribution due to the AC coupling capacitor and the effect of the YTF (YIG tuned filter). and linearity??? /u]
Appreciate if you guys manage to clear my doubts. Anyway, just for your guys information, i am doing power sensor products. Below is my doubts.
1. What is RF ripple?
2. How this RF ripple will affect the measurement?
3. What cause the RF ripple occur?
4. How to eliminate RF ripple?
Below is my understanding of flatness, please correct me if i am wrong. Thank you.
1. What is Flatness?
IF amplitude flatness would act as a frequency discriminator and convert frequency changes into amplitude errors.
2. How this flatness will affect the measurement?
convert frequency changes into amplitude errors.
3. What cause the flatness happened?
[u]due to SWR across any 10 MHz span, the contribution due to the AC coupling capacitor and the effect of the YTF (YIG tuned filter). and linearity??? /u]
I think you are talking about ripple in the frequency response. Usually, the ripple is caused by a mismatch between the load and the transmission line. In certain frequencies, the incident and the reflected waves add, in other frequencies, they subtracted themselves, what gives the characteristic ripple in the response.
To eliminate or minimize the response ripple you should:
1) match, as best as possible, the load with the transmission line, and/or
2) reduce the transmission line length to a minimum