[time-nuts] M100 hookup information
kirbybq at bellsouth.net
Sat Aug 20 10:57:09 EDT 2005
On my FRK-L I have a LAMP monitor , its at 7.5 volts and a XTAL voltage
and its at 7 volts.
The lamp voltage will stay about the same, but it will slowly change
over its life, a big change signals the lamp is open. The FRK-L manual
shows the normal range is 6 to 12 volts, and 3 volts is a inop lamp.
The XTAL voltage is the phase lock voltage, its usually adjusted for the
center of its sweep range. On the FRK-L the range is 0.6 to 17 volts.
>I am looking for some information on my recently acquired M100.
>The pinouts are labelled on the unit so i have managed to power it up and get lock
>I have found out (empirically) that the "lock" signal is an open collector signal, so i now have a lock LED.
>There are 2 analog (lock?) voltages also coming out. What is the maximum voltage from these pins? I want to include a voltmeter to monitor these voltages on the packed module box. What voltage should they be? Midrange?
>Date: Mon, 15 Aug 2005 23:44:09 -0500
>From: Brian Kirby <kirbybq at bellsouth.net>
>Subject: Re: [time-nuts] rubidium standard caveats?
>To: Discussion of precise time and frequency measurement
> <time-nuts at febo.com>
>Message-ID: <43016F19.1070001 at bellsouth.net>
>Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>A FRK-L or M100, or LPro are good units. Make sure the buyer throws in
>the I/O connector and a manual. I beleive the best is the SRS PRS10, it
>cost more, but it has great specs and it has a built in disciplining
>circuit - if it hooked up to a 1 PPS from a timing GPS receiver.
>Certain FE5680s should be avoided - some are custom made for the
>cellular industry and they are programmable via DDS. Nobody has been
>able to supply the RIGHT programing information. The units are also not
>stock - the pinouts are different then advertised.
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