Paul, I am currently in a terrible hurry with my job. Must return to the FS700 later. Currently it runs completely ok on the W3DZZ with 102 dB receiver gain and 31 dB noise margin. I have connected the output of my Z3805 to the FS700's comparator input and the display says that ther is a delta-f of 1.9E-13 measured over a period of 117 hours.
Best regards Ulrich > -----Ursprungliche Nachricht----- > Von: [email protected] > [mailto:[email protected]] Im Auftrag von paul swed > Gesendet: Freitag, 26. November 2010 17:27 > An: Discussion of precise time and frequency measurement > Betreff: Re: [time-nuts] FS700 schematic > > > did you have any luck? > > On Tue, Nov 23, 2010 at 8:05 PM, paul swed > <[email protected]> wrote: > > > Not a problem on spelling especially if tired. > > The problem you are running into is really curious indeed. Since we > > have no LORAN C in N A anymore. I can only use the loran > simulator to > > drive the FS700 and that works very well. I have the > antenuator in the > > simulator at -55 db as I recall to simulate the signal I > used to get > > from the 9960 chain. Literally have no problem at all as > you have run > > into. I did put the eproms on the K04bb site for safe > keeping. Maybe > > software vintage? Regards > > > > > > On Tue, Nov 23, 2010 at 12:52 PM, Ulrich Bangert > > <[email protected]>wrote: > > > >> This: sours should of course read: source > >> > >> > -----Ursprungliche Nachricht----- > >> > Von: [email protected] > [mailto:[email protected]] > >> > Im Auftrag von Ulrich Bangert > >> > Gesendet: Dienstag, 23. November 2010 18:32 > >> > An: 'Discussion of precise time and frequency measurement' > >> > Betreff: Re: [time-nuts] FS700 schematic > >> > > >> > > >> > Hi Paul, > >> > > >> > > If you are using something different then an active > antennathat > >> > > draws current. You need a 470 ohm resistor to ground at the > >> > > antenna bnc.The system sense current being drawn both high and > >> > > low. > >> > > >> > Yes, this is understood. My "antenna coupler" for the W3 > includes a > >> > 560 Ohm resistor and Frank has found out that even a 1 K > resistor > >> > is "accepted" as a functioning active antenna. My active > loop draws > >> > some 8 mA from the center conductor and is therefore > accepted as a > >> > functioning active antenna too. > >> > > >> > If the mysterious action has taken place it seems indeed > as if the > >> > the receiver gain is set to a very low if not zero > value. This is > >> > well understood because SRS says: If the <1 dB condition > is met the > >> > receiver stops action, so setting the gain to zero or so > may be a > >> > natural result of this. The big question is: What has happened > >> > before that makes the receiver THINK that this condition is met? > >> > Franks and mine receiver doing literally the same seems > to indicate > >> > that the sours is the same for both of them. > >> > > >> > Best regards > >> > Ulrich Bangert > >> > > >> > > -----Ursprungliche Nachricht----- > >> > > Von: [email protected] > >> > > [mailto:[email protected]] Im Auftrag von paul swed > >> > > Gesendet: Montag, 22. November 2010 23:34 > >> > > An: Discussion of precise time and frequency measurement > >> > > Betreff: Re: [time-nuts] FS700 schematic > >> > > > >> > > > >> > > Looked at the schematics front end is simple. > Essentially op amps > >> > > notch filters and most important electronic selectable > >> > > attenuators. Any of it could cause issues. But the > good news is a > >> > > amplified loran signal is on the back of the unit so you could > >> > > look to see whats happening to the signal. Oh other > big point. If > >> > > you are using something different then an active antennathat > >> > > draws current. You need a 470 ohm resistor to ground at the > >> > > antenna bnc.The system sense current being drawn both high and > >> > > low. Regards Paul. > >> > > > >> > > On Mon, Nov 22, 2010 at 1:46 PM, paul swed > <[email protected]> > >> > > wrote: > >> > > > >> > > > My thats a reasonable answer indeed. > >> > > > > >> > > > > >> > > > On Mon, Nov 22, 2010 at 12:24 PM, Stan, W1LE > >> > <[email protected]> > >> > > > wrote: > >> > > > > >> > > >> It is not just one page. What are you specifically > >> > looking for ? > >> > > >> Most sheets are B size ( double A size). > >> > > >> > >> > > >> I got the complete manual from SRS for ~35$ > >> > > >> > >> > > >> Stan, W1LE > >> > > >> > >> > > >> > >> > > >> > >> > > >> On 11/22/2010 10:00 AM, Ulrich Bangert wrote: > >> > > >> > >> > > >>> Gentlemen, > >> > > >>> > >> > > >>> I know this one has been asked a few years before > but I give > >> > > >>> it another > >> > > >>> try: > >> > > >>> > >> > > >>> Has anyone of you a Stanford Research FS700 schematic > >> > > available that > >> > > >>> he can share with me? > >> > > >>> > >> > > >>> Best regards > >> > > >>> > >> > > >>> Ulrich Bangert > >> > > >>> www.ulrich-bangert.de > >> > > >>> Ortholzer Weg 1 > >> > > >>> 27243 Gross Ippener > >> > > >>> > >> > > >>> > >> > > >>> _______________________________________________ > >> > > >>> 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. > >> > > >>> > >> > > >>> > >> > > >> > >> > > >> _______________________________________________ > >> > > >> 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. > >> > > >> > >> > > > > >> > > > > >> > > _______________________________________________ > >> > > 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. > >> > > >> > > >> > _______________________________________________ > >> > 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. > >> > >> > >> _______________________________________________ > >> 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. > >> > > > > > _______________________________________________ > 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. _______________________________________________ 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.
