[time-nuts] Re: looking for MITREX modem manual/documentation

[ghf at hoffmann-hochfrequenz.de]

Hi, JeanMichel,

you might ask Wolfgang Schäfer at timetech.de
phone number from web site.

cheers,
Gerhard



Am 2022-03-25 13:55, schrieb jeanmichel.friedt at femto-st.fr:
> Dear community,
> I am trying to find historical documents describing the pseudo random
> sequences used
> in the SATRE Two-Way Satellite Time and Frequency Transfer (TWSTFT) 
> modem.
> K. Imamura & F. Takahashi (Two Way Time Transfer Via a Geostationnary
> Satellite,
> J. of the Comm. Research Lab., 39(1), March 1992) describe the code 
> structure
> (14-bit long pseudo random sequence truncated to 10000 bit length) but 
> the
> generator polynomial coefficients are not given. I have not been able
> to find this
> information in Timetech's SATRE manual nor in the publicly available 
> literature.
> This paper cites "P. Hartl, A modem for microwave time and ranging 
> experiments
> via telecommunication satellites, MITREX2500 Manual, Jan 1989" which I 
> am unable
> to locate.
> Would anyone have such a document, or at least could tell me whether
> the generator
> polynomials are described there? Alternatively, does anyone have a
> description of these
> 14-bit polynomial generators?
> 
> Thanks, Jean-Michel
> 
> --
> JM Friedt, FEMTO-ST Time & Frequency, 26 rue de l'Epitaphe, 25000
> Besancon, France
> _______________________________________________
> time-nuts mailing list -- time-nuts at lists.febo.com -- To unsubscribe
> send an email to time-nuts-leave at lists.febo.com
> To unsubscribe, go to and follow the instructions there.