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.
fre_eng wrote:
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?
Thanks
Dave Robinson
Message: 3
Date: Mon, 15 Aug 2005 23:44:09 -0500
From: Brian Kirby <[EMAIL PROTECTED]>
Subject: Re: [time-nuts] rubidium standard caveats?
To: Discussion of precise time and frequency measurement
<[email protected]>
Message-ID: <[EMAIL PROTECTED]>
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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