Engineer's Corner

BRIDGED T PAD ATTENUATOR DESIGN
This is by far the easiest design for a matching impedance pad (either balanced or unbalanced), because it is only necessary to choose the desired voltage reduction ratio and subtract one to determine the factor to be used to compute the remaining resistance values.

Decibel Conversion Table
This is a table for decimal conversion.

De-Emphasis Response Table (75us, 25us, J-17)
The reason for Pre/De-emphasis in FM modulated transmission systems.

Narrow Band Frequency Assignment Chart
This is a frequency assignment chart for Audio Subcarriers.

CARSON'S RULE Calculating FM Modulation Bandwidth
CARSON'S RULE: A formula is used to determine the RF Bandwidth or occupancy for an FM signal. If you are designing an FM system on microwave or satellite, you will need to take care that your signal does not cross-talk into other signals on the system.

NTSC Video Pre/De-Emphasis Response Chart
The purpose of video pre and de-emphasis in transmission, why is it used?