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 <[email protected]> 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. _______________________________________________ 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.
