[time-nuts] GPSDO recommendation

J. L. Trantham jltran at att.net
Wed Oct 12 13:41:50 UTC 2011

Don't forget the Z3816A and the Z3805A.  Both are seen with 24 VDC and 110
VAC options.  The Z3816A (8 sats) has a DB9 RS232 port and the Z3805A (12
sats) has a DB25 RS232 port and both require a Null Modem adapter or cable.


-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Hal Murray
Sent: Wednesday, October 12, 2011 12:38 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] GPSDO recommendation

> I have been using Rb oscillators as my standard for a while but would like
> to be  able to have both a frequency as well as time standard which is
> synchronized to  something outside my lab.  I would like to have: 

> Frequency stability at least as good as the Rb osc Time server which can
> accessed on my network 12 or 24 volt DC operation for easy power backup
> ideally $200 or less

A Z3801A runs off 48V.  Some are 24V.  I doubt if you will find one for
 EBay has one for $500 and another for $1000.

A Trimble Thunderbolt needs +12, +5, and +12.  EBay has one for $110 and 2 
more for $250.

In both cases, round up for an antenna.

> I am willing to do some building and gathering to implement this,
> setting up a computer.  The time server need only last as long as the
> computer  is up in a power outage, although I would keep the base
> osc running for  an extended period. 

Neither the Z3801A nor the TBolt are setup to power the oven while the reset

of the setup is powered down.

These are my opinions, not necessarily my employer's.  I hate spam.

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