UBBVX exposed to high power signal

Aaronia Low Noise Preamplifier series up to 35GHz

UBBVX exposed to high power signal

Postby mauryv » Thursday 10. August 2017, 23:32

Hi Guys,

I just had a problem with my UBBVX preamplifier, according to support it was exposed to high power signal so it got broken, i was using it to measure the downlink spurious interference of a 3g and 2G carrier in band 850MHz that drops in the uplink channel of band 900MHz, according to the MAX power input, it just supports up to 15dBm, so it is probably the reason of the problem.

But my question is, that i need to measure this kind of signals, is there any variable attenuator that you can suggest me to use to protect the preamplifier or how what suggestions can you give me.

Thanks and B.R.

Maury
mauryv
 
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Joined: Tuesday 8. August 2017, 16:41

Re: UBBVX exposed to high power signal

Postby Moderator » Friday 18. August 2017, 07:40

Simply add a fixed 10dB or 20dB attenuator or use our BPA preamplifier (http://www.aaronia-shop.com/products/br ... -amplifier) series which can hold a much higher power level (21dBm) and offers a bypass mode.
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Re: UBBVX exposed to high power signal

Postby mauryv » Monday 21. August 2017, 19:58

Hi Moderator,

Thanks for your answer, but i wolud like to ask you if you know:

1. if there is a variable attenuator in the market maybe from AARONIA or other vendor?
2. According to your suggestion, my problem is that "BPA" preamplifier has just around half of the gain than UBBX, right?

Thanks and B.R.

Maury
mauryv
 
Posts: 2
Joined: Tuesday 8. August 2017, 16:41

Re: UBBVX exposed to high power signal

Postby Moderator » Friday 25. August 2017, 21:20

1. if there is a variable attenuator in the market maybe from AARONIA or other vendor?

Not from us but have a look at the typical market platforms.
2. According to your suggestion, my problem is that "BPA" preamplifier has just around half of the gain than UBBX, right?

Yes but i dont see a problem since you want to measure very high signals.
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