[Spm] noise in STM

[yang]

Dear SPMers,

We use a new LT STM of Omicron. When image to HOPG at room  
temperature in UHV,  there is always the noise about 20Hz.  Does  
someone know about that kind of noise?
Thanks a lot
-----------------------------------------------------------
Peng YANG
Doctorant
Laboratoire LM2N
Directeur: Pr M.-P. Pileni
Université Pierre et Marie Curie
4 place Jussieu
75252 Paris Cedex 05
tel: 01 44 27 26 96
fax: 01 44 27 25 15


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