[time-nuts] Using Thunderbolt to Discipline FE 5680A?

Azelio Boriani azelio.boriani at screen.it
Thu Dec 22 15:57:31 EST 2011


Yes, why move magnets when it is easier to send commands over the serial
link? Or drive the EFC with a DAC  for those Rbs that have it.

On Thu, Dec 22, 2011 at 9:53 PM, Chuck Forsberg WA7KGX N2469R
<caf at omen.com>wrote:

> Why have the Arduino move a magnet when it can send frequency offset
> commands out a serial port?
>
> On 12/22/2011 12:36 PM, Don Latham wrote:
>
>> Let's see... someone mentioned using a magnet on top of the case to
>> alter the Rb lock frequency. So, put the Rb output and the Tbolt output
>> into a single mixer with lopass filter, or a phase comparator, then use
>> the  output through something like a picaxe or arduino implementing PID
>> software to run a model aircraft servo with a magnet on the servo arm.
>> Hey Presto!  :-) :-)
>> Don
>>
>> Bob Camp
>>
>>> Hi
>>>
>>> To use the current crop of FE-5680A's directly with the TBolt, you would
>>> have to tear it apart and get a wire into the C field circuit. If you
>>> didn't
>>> do that, you would have to stick a PC (or other controller) in between
>>> the
>>> TBolt and the Rb. As they come from the vendors, there is no voltage
>>> control
>>> capability in the units. There are so many flavors of this Rb that
>>> anything
>>> said about them only applies to some of them.
>>>
>>> Bob
>>>
>>> -----Original Message-----
>>> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
>>> Behalf Of Chris Albertson
>>> Sent: Thursday, December 22, 2011 12:20 PM
>>> To: Discussion of precise time and frequency measurement
>>> Subject: Re: [time-nuts] Using Thunderbolt to Discipline FE 5680A?
>>>
>>> On Thu, Dec 22, 2011 at 8:50 AM, Frederick Bray<fwbray at mminternet.com>
>>> wrote:
>>>
>>>> Has anyone successfully used a Thunderbolt to discipline a FE-5680A?
>>>>
>>>> I thought I saw a posting or site where someone disabled the 10 MHz
>>>> oscillator on the Thunderbolt and used the Thunderbolt to discipline
>>>> the
>>>> FE-5680A.  However, I can't find it now.
>>>>
>>> I would not do it that way.  My plan is to leave the t-bolt as is and
>>> then every 24 or so hours adjust the  FE-5680A if required to better
>>> match the t-bolt.  My hope is that after some time the    FE-5680A
>>> will less and less frequent adjustments.  This will be a while as my
>>> FE-5680A is still in the mail.
>>>
>>> I think the FE-5680A has to course of adjustment to be used in the
>>> "fast" control loop inside the t-bolt
>>>
>>>
>>> Chris Albertson
>>> Redondo Beach, California
>>>
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>>
> --
> Chuck Forsberg WA7KGX N2469R     caf at omen.com   www.omen.com
> Developer of Industrial ZMODEM(Tm) for Embedded Applications
>  Omen Technology Inc      "The High Reliability Software"
> 10255 NW Old Cornelius Pass Portland OR 97231   503-614-0430
>
>
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