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[time-freq] time-freq Digest, Vol 38, Issue 2

Merv Thomas vk6bmt at iinet.net.au
Mon Mar 5 13:41:07 UTC 2012


Hi Luis - thanks for the reply.

Right now it is a bit of a quandary as to what firmware version was 
installed as the person who did this(some 3 to 4 years ago)has no record!

My expert friend and I want to configure the CPLD to use a 10MHz reference 
to discipline a 10 MHz OCXO oscillator so possibly the VHLD's for the 
r2_flex_01 and the r2_bigflex-01.

Later on I would also like to use a 10KHz reference from a Jupiter GPS to 
discipline the 10MHz OXCO if that is possible so you may have a better idea 
as to what you need to send us.

My friend has not at this stage looked at anything yet as he was awaiting 
the source code files.

I suppose they are too large to send all versions??

Your generous help appreciated.

Currently I have experimented with a development board from Atmel for their 
AD8302 and have a very successful lock from an HPZ3801A GPS as reference 
controlling an Isotemp 10MHz OXCO and checking the OXCO freq with an HP 
5335A(which has a GPS 10MHz external timebase) counter which shows an exact 
10MHz output right down to 00 after the last Hz register.

Will the Reflock 2 also achieve this or better(don't have any way to check 
for greater accuracy!)

Regards,

Merv  VK6BMT
----- Original Message ----- 
From: <time-freq-request at tapr.org>
To: <time-freq at tapr.org>
Sent: Monday, March 05, 2012 8:00 PM
Subject: time-freq Digest, Vol 38, Issue 2


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> Today's Topics:
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>   1. VHLD Files - Reflock 2 (Merv Thomas)
>   2. Re: VHLD Files - Reflock 2 (Luis Cupido)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sun, 4 Mar 2012 20:05:30 +0800
> From: "Merv Thomas" <vk6bmt at iinet.net.au>
> Subject: [time-freq] VHLD Files - Reflock 2
> To: <time-freq at tapr.org>
> Message-ID: <1879DD09F8584C96ACA1FB0BBDE9E06D at merv>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
> Hi Luis - I wonder if you have had time to find the files.  My expert 
> friend
> was thinking of reallocating the function of pin 89 REF input to another
> unused clock input so I could cut the trace to pin 89 and then run a 
> jumper
> from the collector of the BFT92 to that other pin on the CPLD.
>
> Does this sound feasible please?
>
> Having delays getting a replacement CPLD as Farnell(Element14) sources out
> of Singapore who want and End User Statement before shipping and one of 
> the
> requirements is a copy of my identity card and as we do not have such a 
> card
> in Australia I have had to cancel the order.   Now awaiting shipment
> possibly from the UK.
>
> So the pin swapping may be a way of avoiding desoldering the CPLD.
>
> Regards,
>
> Merv  VK6BMT
>
>
>
>
> ------------------------------
>
> Message: 2
> Date: Sun, 04 Mar 2012 23:38:15 +0000
> From: Luis Cupido <cupido at mail.ua.pt>
> Subject: Re: [time-freq] VHLD Files - Reflock 2
> To: TAPR time and frequency projects <time-freq at tapr.org>
> Message-ID: <4F53FCE7.1020906 at mail.ua.pt>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> Merv,
>
> Ok. I found them.
>
> What is the design that you're using ?
> I have several designs for the reflock II board want to send the one
> that works for you.
>
> Tell me the original name of the pof file, or go to my pages and
> identify the design in the list.txt file and other .txt files
>
> http://www.qsl.net/ct1dmk/r2_conf_set10_01.zip
>
>
> and let me know.
>
> ---
>
> if a bad clock input pin is the problem
> changing the design to another pin may work yes.
>
>
> lc.
> ct1dmk.
>
> p.s.
>
> > requirements is a copy of my identity card and as we do not have
> > such a card in Australia
>
> Passport nr usually works out too.
>
>
>
>
> On 3/4/2012 12:05 PM, Merv Thomas wrote:
>> Hi Luis - I wonder if you have had time to find the files. My expert
>> friend was thinking of reallocating the function of pin 89 REF input to
>> another unused clock input so I could cut the trace to pin 89 and then
>> run a jumper from the collector of the BFT92 to that other pin on the 
>> CPLD.
>>
>> Does this sound feasible please?
>>
>> Having delays getting a replacement CPLD as Farnell(Element14) sources
>> out of Singapore who want and End User Statement before shipping and one
>> of the requirements is a copy of my identity card and as we do not have
>> such a card in Australia I have had to cancel the order. Now awaiting
>> shipment possibly from the UK.
>>
>> So the pin swapping may be a way of avoiding desoldering the CPLD.
>>
>> Regards,
>>
>> Merv VK6BMT
>>
>> _______________________________________________
>> time-freq mailing list
>> time-freq at tapr.org
>> https://www.tapr.org/cgi-bin/mailman/listinfo/time-freq
>>
>
>
>
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> End of time-freq Digest, Vol 38, Issue 2
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