Efratom FRS Manual

Frank Gentges fgentges at mindspring.com
Sat Jan 3 15:49:52 CST 2004


Too bad but I hope the manual helped you avoid waisting coultless hours 
trying to fix the unfixable.

I had good luck several years ago using the 1 PPS from a GPS receiver to 
compare with the 1 PPS from a divider from a frequency standard to track 
the frequency standard's drift.  I used a frequency couter in the period 
measurement mode and logged it daily.  After observing the log I would 
adjust the frequency standard.  Earlier adjustments let me calibrate the 
adjusment, which was on a 10 turn pot with a nice dial.  Once I had the 
dial calibrated in frequency shift, I could pretty much put the standard 
on frequency.  Once I got good at that, I could predict the daily drift 
of the standard and could make the adjustment based on that.

I found it very educational doing all this.  Its nice to share my hard 
earned knowledge.  I hope you enjoy doing it too.

Best new year and 73
Frank K0BRA

PY3CRX PY2PLL wrote:

>Thanks Frank ...
>I guess I´ll build the GPS locked VCXO as CT1DRP projext instead ... hi hi
>Marcus, PY3CRX/PY2PLL
>Active from "DC" to 24GHz
>----- Original Message ----- 
>From: "Frank Gentges" <fgentges at mindspring.com>
>To: <py2pll at py.qsl.br>
>Cc: <k3kq at comcast.net>; <IK1ODO at spin-it.com>
>Sent: 27 December, 2003 18:57
>Subject: Efratom FRS Manual
>>The Ball Efratom FRS manual is attached.  Hope this helps.
>>Frank K0BRA

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