[time-nuts] looking for low-power system for gps ntptimekeeping NANOSG20

[Mark C. Stephens]

I have the same model and the trigger settings are great for capturing those tiny width PPS pulses.
I setup the trigger so I see the pulse in the middle of the screen and its updated when the pulse occurs.

In a nutshell, as Chris mentioned, The trigger modes are excellent for time nuts.

The USB works flawlessly but the network basically only works with a crossover cable to a laptop.
The network won't work across routers etc.
I recently got them to fix the firmware to auto negotiate the correct speed but alas, it still won't work across routers.
The control software is.. mmm.. work in progress..

You can plug a VGA monitor in, but honestly the Scope has a huge screen anyway.
Its light, portable and there is a battery pack available if you want to guard ground when working on live switch mode PSU.

At the time mine cost less than $300 AUD, but I believe they have gone up in price now.

I can honestly admit, this scope has become my main scope on the bench, except for a 400MHz Tek Analogue I use infrequently.


-marki

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf Of David J Taylor
Sent: Thursday, 4 July 2013 3:27 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] looking for low-power system for gps ntptimekeeping NANOSG20

From: Chris Albertson

The computer itself and the NTP installation are OK because we can see it syncing to other NTP servers.  Likely you have a problem in the way the GPS using is connected.
Some common errors is an inverted PPS, just flip it ad see if you gets better, it is really hard to see a 1Hz signal on a scope.
=================================

Any 'scope should be able to see a pule which is high for 100 ms and low for
900 ms!  Modern digital scopes even make it easy to see a 100 ns pulse repeated at 1 second intervals.

Best investment I made recently was a Rigol DS1052E 'scope - so useful for time-nuts type work.  It was /just/ affordable, and it may be even a lower cost now as a newer model is out.

Cheers,
David
--
SatSignal Software - Quality software written to your requirements
Web: http://www.satsignal.eu
Email: david-taylor at blueyonder.co.uk 

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