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Amplifier testing

Question asked by JrV on Oct 8, 2009
Latest reply on Oct 9, 2009 by JrV

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Hello,

Can anybody guideline me, or have experience in building a high power test set using the N5230C PNA-L.
Way to setup a system and calibration.

Regards,
J

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JrV Oct 8, 2009 6:19 AM
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Hello,

Extra information about what I like to do.

I like to add an external test using some external couplers that can handle higher powers then the internal coupler in the PNA-L N5230C (with option 146 and 080)
+ a booster amplifier using to drive my DUT (= amplifier).

One way to do this is by connecting the coupled port of each external coupler to the measurement receiver of the PNA-L
(with some attenuation between the coupled port and the receiver to protect the measurement receiver, and not to go in compression)
But if I do this, I assume, that a need to write my own calibration routines. Correct?
Anybody experience?

Regards,
J.
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am95405 Oct 8, 2009 12:46 PM
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App note on high power testing written for the PNA, but concepts apply to PNA-L.
http://cp.literature.agilent.com/litweb ... 1349EN.pdf

A few questions that if you answer can help us provide more guidance:
- What is the input and output power range you expect?
- What S-parameters do you wish to measure? all four? two?
- Are you going to be measuring output power at compression or some parameter where the absolute power level (versus relative) is critical?

Regards,
Afsi Moaveni
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JrV Oct 9, 2009 12:17 AM
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Afsi,

Thanks for the reply.

I have read this application note. Based on this I have worked out a potential measurement setup.

One of the problems that I have is that I can not perform a full 2-port calibration. Only if I connect the coupled port of each external coupler to the measurement receiver of the PNA-L+ attenuation between the coupled port and the receiver to protect the measurement receiver, and not to go in compression. But in this case I think I need to write a SOLT.

The answers of your questions
- What is the input and output power range you expect?
input 4 Watt - output 10 Watt (future higher)

- What S-parameters do you wish to measure? all four? two?
Ideal all the 4

- Are you going to be measuring output power at compression or some parameter where the absolute power level (versus relative) is critical?
I like to measure: PAE, AM to AM (compression), AM to PM, two tone test, hot S22.

Regards,
J.
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Amplifier testing

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