Try hooking the output to an LED. It's very difficult for me to see the pulse on my analog scopes but there is no arguing with the blinking light.
-Bob On Mon, Feb 8, 2010 at 8:05 AM, SAL CORNACCHIA <[email protected]> wrote: > Thank You John, I have tried with different sweep speeds both above and > below 100 us/div, the problem appears to be no output at all. > > Best regards, > > Sal C. Cornacchia > Electronic RF Microwave Engineer (Ret.) > > > > > > > > ________________________________ > From: John Ackermann N8UR <[email protected]> > To: Discussion of precise time and frequency measurement < > [email protected]> > Sent: Sun, February 7, 2010 8:45:06 PM > Subject: Re: [time-nuts] No 1 PPS output on a Tbolt > > Sal, what sweep time are you using on the scope? I believe the TBolt > PPS is only microseconds wide, so you may need to speed up the sweep > time to around 100us/div or faster to see it accurately. And you may > need to mess with delaying the sweep to get the pulse on the screen. > > John > ---- > > SAL CORNACCHIA said the following on 02/07/2010 08:32 PM: > > 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 <[email protected]> > > To: Discussion of precise time and frequency measurement < > [email protected]> > > 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<[email protected]> > >> To: Time-Nuts<[email protected]> > >> 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<[email protected]> > >> Date: Sun, 7 Feb 2010 08:42:49 > >> To: Discussion of precise time and frequency measurement< > [email protected]> > >> 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<[email protected]> > >> 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"<[email protected]> > >> Sent: Sunday, February 07, 2010 11:06 AM > >> To: "Discussion of precise time and frequency measurement" > >> <[email protected]> > >> 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"<[email protected]> > >>> To: Discussion of precise time and frequency measurement > >>> <[email protected]> > >>> 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 -- [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.
