[time-nuts] new GPSDO available

[SAIDJACK at aol.com]

Hello Joe,
 
thanks for the feedback and questions! Some other members asked for more  
details, I will send out more technical details in the next day or two.
 
You can make an SNTP time server with the FireFly or Fury GPSDO in two  ways:
 
1) The simple way of doing it:
 
Connect a PC running GPSCon to either one of the two units via the serial  
port. GPSCon is quite inexpensive and works pretty well. It has a built-in SNTP  
server function among other features. I believe you can get it for less than 
$50  at realhamradio dot com. All you need is a Null Modem Cable, and  PC with 
 the software installed.
 
2) This way provides tighter timing accuracy, but requires soldering a  
single wire:
 
For better accuracy, you can run SNTP or NTP server software on a  Linux PC, 
and connect a 1PPS RS-232 level compatible signal to pin 4 of the Fury  or 
FireFly DB-9 connector. The PC will trigger on this signal (usually connected  to 
DCD on the PC side) and provide a high accuracy time server. You can search  
the Time Nuts archives on how to set up Linux to do this.
 
The Fury and FireFly both support this 1PPS RS-232 level signal on the PCB,  
but it's not connected to the RS-232 connector by default. The user has to 
wire  it up to the DB-9 connector.
 
Let me know if anyone wants details on how to wire up their RS-232  connector 
for this.
 
Hope that helps,
 
bye,
Said
 
 
In a message dated 3/25/2008 14:53:28 Pacific Daylight Time,  
wa9msd at ggnet.net writes:

Looks  very cool!  So how do I make, or have my Network Administrator make,  a
NTP time server from one of these or one of your other products?  I  am
technically inept and am in the market for a time server, Meinberg's  are
nice but out of my budget.  Any help is  appreciated.

Joe

-----Original Message-----
From:  time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of  SAIDJACK at aol.com
Sent: Tuesday, March 25, 2008 1:15 PM
To:  time-nuts at febo.com
Subject: [time-nuts] new GPSDO available

Hi  guys,

sorry for the more or less commercial nature of this  email.

Wanted to share with you that we have shrunk our Fury GPSDO into  a 1 inch x

2.5 inch x 0.5 inch tiny little package, called the FireFly.  It's the most  
inexpensive new GPSDO that we know of at this  time.

It's less than 1/2 the size of a credit card.

The unit has  a subset of the Fury SCPI commands, generally it has the same   
features as the Fury. The performance is pretty good too, and  power
consumption 
was reduced to < 1.4W at 12V using a  high-stability small OCXO.

We are using a highly sensitive mobile GPS  receiver now, so it can be used  
in a moving car etc. The GPS  receiver is sensitive down to -151dBm
tracking. 
Some preliminary specs  are available at _www.jackson-labs.com_ 
(http://www.jackson-labs.com)  

We are sampling the units now. Let me know if anyone is interested in  more  
details, we are presently fully qualifying the  unit.

Bye,
Said



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