nierveze wrote:
hello,thanks for your answer,I also have a nm67 and a nm57,all working
well,no documentation of course!!!

I have an NM-12AT! I never did succeed in getting manuals for mine.

they are very useful to measure gain or nf of preamplifiers,or simply as
receivers.I have been using the nm57 on 137 mhz during lots of years to get
pictures from wheather sats.

That is pretty sensitive. The NM-12AT is not sensitive enough to get
the local airport beacon, although it will detect a signal from my
signal generator. I do not understand the calibration and meaurement
procedure and my suspicion is that the front end is damaged because the
sensitivity is so poor.

Is the anyone that has some information:sensitivity,nf,frequency and
bandwith if the if,and some other things.???

No, I wish I did!
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."