Motorola MRF454 Output Power vs Input Power graph questions.

snippits75 · Nov 30, 2019

Is the input power on the graph average watts?

Say I am driving an amp with adjustable RF power radio. How does the PEP watts effect, or factor into the graph? Or in other words, how do I know how many PEP watts is OK?

blasphemy000 · Dec 5, 2019

Watts are watts. It's irrelevant how you measure it. Those graphs apply to the test circuit used in the datasheet, so when used in a different circuit (Such as a push-pull amplifier), the graph will be different. It still doesn't matter though. According to the graph, for their test circuit, if you apply 1 watt of input power, you get 45 watts output. This doesn't matter if it's a 1 watt carrier or 1 watt PEP from an AM or SSB envelope. Power is power.

73s

kopcicle · Dec 5, 2019

https://www.communication-concepts.com/content/AN762/AN762_Application_Note.pdf

There is more to the MRF454 than just input/output.

Do you want to know more?

Captain Kilowatt · Dec 5, 2019

Gain specs are always given in average power unless otherwise stated. When looking at power I/O charts like above use the same reference on both sides ie: if 4 watts average in equals 45 watts out then 4 watts pep will make 45 watts pep out.

kopcicle · Dec 5, 2019

kopcicle said:
Do you want to know more?

I wasn't asking you

We've both been down this road too many times.

Captain Kilowatt · Dec 5, 2019

kopcicle said:
I wasn't asking you
We've both been down this road too many times.

Ooookaaaayy........... Here is a link you may be interested in.

https://www.psychologytoday.com/ca/...entity-disorder-multiple-personality-disorder

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Motorola MRF454 Output Power vs Input Power graph questions.

snippits75

Sr. Member

blasphemy000

Well-Known Member

kopcicle

Sr. Member

Captain Kilowatt

Professional Amateur

kopcicle

Sr. Member

Captain Kilowatt

Professional Amateur

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