[Preston JackeyMember]

Dear Ahmad,

Can you explain the difference in bandwidth between low pass Bessel and Butterworth filters when cut-off frequency is set at 0.75*bit rate? How to calculate the optimum bandwidth and 3dB frequency response in Optisystem? Can you also provide the components required and the step-by-step procedure for this calculation?

[Preston JackeyMember]

Dear Ahmad,

Can you explain the difference in bandwidth between low pass Bessel and Butterworth filters when cut-off frequency is set at 0.75*bit rate? How to calculate the optimum bandwidth and 3dB frequency response in Optisystem? Can you also provide the components required and the step-by-step procedure for this calculation?

[Preston JackeyMember]

Dear Ahmad,

Thank you for your prompt reply and the helpful information. I appreciate your explanation on the typical selection of bandwidth as 0.75 of the bit rate or baud rate.
I just wanted to clarify that the 0.75 factor for bandwidth selection applies to all filters, such as Bessel and Butterworth, and will have the same value for bandwidth, correct?

Additionally, I was wondering if you could provide some guidance on how to use a spectrum analyzer to find the 3dB response and then calculate the optimal bandwidth.

Thank you again for your time and assistance.

Best regards,
Muhammad

[Preston JackeyMember]

Dear Ahmad,

Thank you for your prompt reply and the helpful information. I appreciate your explanation on the typical selection of bandwidth as 0.75 of the bit rate or baud rate.
I just wanted to clarify that the 0.75 factor for bandwidth selection applies to all filters, such as Bessel and Butterworth, and will have the same value for bandwidth, correct?

Additionally, I was wondering if you could provide some guidance on how to use a spectrum analyzer to find the 3dB response and then calculate the optimal bandwidth.

Thank you again for your time and assistance.

Best regards,
Muhammad