[time-nuts] HP10514B Mixer Terminations

[Magnus Danielson]

On 09/10/2012 12:21 AM, Bruce Griffiths wrote:
> NIST have indicated that mixer PN noise measurements with a non
> dissipative terminations (even RF) are intended to be made.
>
> Using a discrete mixer using diode connected transistors may also be
> useful at least for 5MHz and 10MHz input frequencies in that their
> flicker noise can be significantly lower than for mixers using diodes.

That actually relates back to Craig Nelson hacking audio gear. He was 
really friendly and we had a nice chat about it. Read more here:

http://tf.boulder.nist.gov/general/pdf/2556.pdf
http://tf.boulder.nist.gov/general/pdf/2625.pdf
http://www.nist.gov/customcf/get_pdf.cfm?pub_id=908622

Cheers,
Magnus