[time-nuts] No 1 PPS output on a Tbolt

Didier Juges didier at cox.net
Sun Feb 7 16:51:15 UTC 2010


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 <salccor at rogers.com>
Date: Sun, 7 Feb 2010 08:42:49 
To: Discussion of precise time and frequency measurement<time-nuts at 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 <lists at cq.nu>
To: Discussion of precise time and frequency measurement <time-nuts at 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" <salccor at rogers.com>
Sent: Sunday, February 07, 2010 11:06 AM
To: "Discussion of precise time and frequency measurement" 
<time-nuts at 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" <stanw1le at verizon.net>
> To: Discussion of precise time and frequency measurement 
> <time-nuts at 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
>
>
>
>
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