On Sun, 19 Apr 2009 08:22:53 -0700, Corby Dawson wrote: >Arnold,
>Look at the top of page 3 on the link below. Not sure how they arrived at >their conclusion but there is one opinion on the HP mixers! >http://www.unusualresearch.com/AppNotes/TimeNuts/OptDualMixer.pdf >Corby Dawson Corby, a real interesting paper, thank you. They seem to think very positive about this HP type of mixers. That HP/ Agilent is mentioning always their own model in all their ANs is understandable, but I do not see similar setups of other institutions or labs with other brands. Anyway, what they are doing is far more of what I want to. I do not have access to ultra stable and very low noise oscillators, nor I have small bw. Spectrum Analyzers and as well no FF-Test devices etc. I am still setting up my small private lab. Let me clarify the situation a bit. The oscillators I work with are mainly 10811 (models A and others), some reference oscillators of other brands, a PRS10, a LPRO, a FRK-HLN 5MHz, a Trimble Thunderbolt (with a defective temp. measuring device, try o find out the impact) and a 1938A, which I have to refurbish, (is about 4 Hz away from nom. frequency and showing some sudden functional stops, btw. I need a v e r y small 1:4 transformer RFTM-16/SM3, hp 9100-5563, can somebody help me? I could not find any!). A lot of work to find out, which oscillator ist the best to serve as reference and then to classify the others. Not so easy as private and somewhat limited "test lab". My TI-counters I use are a 5345A with TI-probes and a 53132A, also a 5334A and a B model, completed by some other equipment. (Cs Standards are not on in view :( ). So, I try to learn and improve the setup by adding a few mixers for the given task, intending to do things right. Most difficult is to get the needed material here. (Unfortunately shipment and VAT are a very important counting factor :( ) Always open I thank you all for the help and hints, (such dokuments are helpful for a lot of members not yet skilled and well equipped!) Arnold _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
