I cannot measure anything, with the scope set at max sensitivity, there is only a tiny dot indication every second. Best regards,
Sal C. Cornacchia Electronic RF Microwave Engineer (Ret.) ________________________________ From: Bruce Griffiths <bruce.griffi...@xtra.co.nz> To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Sent: Sun, February 7, 2010 7:45:26 PM Subject: Re: [time-nuts] No 1 PPS output on a Tbolt Any idea what the pulse shapes you see is with a 1M load and with a 50 ohm load? Bruce SAL CORNACCHIA wrote: > Hi Didier, > > When the 50 ohms termination is switch on the oscilloscope there is a tiny > positive dot deflecting every second, it appears to have a very low output. > Best regards, > Sal C. Cornacchia > Electronic RF Microwave Engineer (Ret.) > > > > > > > > ________________________________ > From: Didier Juges<did...@cox..net> > To: Time-Nuts<time-nuts@febo.com> > Sent: Sun, February 7, 2010 11:51:15 AM > Subject: Re: [time-nuts] No 1 PPS output on a Tbolt > > The pulse is narrow, but it should be a full 5V amplitude. The driver is > pretty beefy, the amplitude does dot drop appreciably when loaded with 50 > ohms on mine. > > Didier KO4BB > > ------------------------ Sent from my BlackBerry Wireless thingy while I do > other things... > > -----Original Message----- > From: SAL CORNACCHIA<salc...@rogers.com> > Date: Sun, 7 Feb 2010 08:42:49 > To: Discussion of precise time and frequency measurement<time-nuts@febo.com> > Subject: Re: [time-nuts] No 1 PPS output on a Tbolt > > Hi Bob, > The pulse is barely visible on the Tektronix 485 it appears to be a very low > output. > Best regards, > Sal C. Cornacchia > Electronic RF Microwave Engineer (Ret.) > > > > > > > > ________________________________ > From: Bob Camp<li...@cq.nu> > To: Discussion of precise time and frequency measurement<time-n...@febo..com> > Sent: Sun, February 7, 2010 11:26:16 AM > Subject: Re: [time-nuts] No 1 PPS output on a Tbolt > > Hi > > The 5345 should see it if it's set to 50 ohm termination and DC coupling.. A > sweep of the trigger from about 1.5 to 3.5 volts should show it there over > most of the sweep. > > Bob > > -------------------------------------------------- > From: "SAL CORNACCHIA"<salc...@rogers.com> > Sent: Sunday, February 07, 2010 11:06 AM > To: "Discussion of precise time and frequency measurement" > <time-n...@febo..com> > Subject: Re: [time-nuts] No 1 PPS output on a Tbolt > > >> Oscilloscope and 5345A Counter, the Tbolt software shows all green. >> Best regards, >> Sal C. Cornacchia >> Electronic RF Microwave Engineer (Ret.) >> >> >> >> >> >> >> >> ________________________________ >> From: "Stan, W1LE"<stanw...@verizon.net> >> To: Discussion of precise time and frequency measurement >> <time-nuts@febo.com> >> Sent: Sun, February 7, 2010 10:47:42 AM >> Subject: Re: [time-nuts] No 1 PPS output on a Tbolt >> >> Hello Sal, >> >> What are you monitoring the PPS output with ?? >> >> It is a short duration pulse. >> >> What does the TboltMON software (available at the trimble website) show ? >> >> What does Lady Heather indicate ? >> (She is just waiting to massage your numbers.) >> >> Stan, W1LE >> >> >> >> > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.