You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
The Feb 2025 Radioddity Giveaway Results are In! Click Here to see who won!

Reply to thread

Message

Erp or EiRP: It's all math and something you can't really measure in the field. However, to get true ERP or EiRP you need to factor in all the devices between the transmitter and the antenna too. This can be as simple as the main transmission line plus connectors, to additional items like Jumper Cables, Lightning Arrestor, Duplexer, Isolator, and other miscellaneous protective devices. You can further skew the facts by using dBw rather than dBm for the transmitter.

By the way, dBi is used by the microwave community to calculate EiRP for Point-To-Point systems, or for persons that like to make their Two-Way systems look way too good.

[QUOTE="KC9Q, post: 360493, member: 23691"] Erp or EiRP: It's all math and something you can't really measure in the field. However, to get true ERP or EiRP you need to factor in all the devices between the transmitter and the antenna too. This can be as simple as the main transmission line plus connectors, to additional items like Jumper Cables, Lightning Arrestor, Duplexer, Isolator, and other miscellaneous protective devices. You can further skew the facts by using dBw rather than dBm for the transmitter. By the way, dBi is used by the microwave community to calculate EiRP for Point-To-Point systems, or for persons that like to make their Two-Way systems look way too good. [/QUOTE]

Top Bottom