Hi, I recently acquired an hp 8970A Noise Figure Meter but w/o noise source. I have a homebuild noise source as described in DUBUS magazine for the PANFI some years ago and a hp 346C which was said to be defective (however it still seems to produce some noise).
Is there any way to 'calibrate' such a noise source to at least some tenths of a dB?
Does it work to measure noise figure of a (pre-)amp with a calibrated noise source and then use the other noise source and adjust the ENR setting in the 8970A until you get same reading compared to the calibrated noise source?
Any comments are welcome
Regards EW