| Products > Test Equipment |
| Ultra Low Noise Preamp, 40dB ,20Hz to 10Mhz |
| (1/1) |
| DennisR:
I'm looking for a pre-build AC coupled 40db amplifier with very low noise. I would need a range between 20Hz to 10Mhz I'd like to measure noise in the range of 100-500µV, but my oscilloscope noise floor is around 2mV. The Picotest J2180A-20 looks promising, but in only has a 20dB gain. https://www.picotest.com/products_J2180A.html |
| David Hess:
100 to 500 microvolts RMS over 10 MHz is 32 to 158 nV/SqrtHz which is not particularly demanding, and *worse* than some old 200 MHz oscilloscopes. A Preamble DA1855 or LeCroy DA1855A does more than you need and might be suitable if you can find one. Differential operation raises input noise by 40%, but also adds common mode rejection which removes noise. https://w140.com/tekwiki/wiki/Preamble_DA1855 |
| sonpul:
If you described your tasks in more detail, perhaps someone will share their methods, experience and equipment used. --- Quote ---I'd like to measure noise in the range of 100-500µV, but my oscilloscope noise floor is around 2mV. --- End quote --- But the J2180A costs as much as a few new oscilloscopes to suit you. Maybe it makes sense for you to buy one and there is no problem? |
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