[time-nuts] Z38XX

Volker Esper ailer2 at t-online.de
Wed Apr 24 14:31:03 UTC 2013


thanks

Am 24.04.2013 13:22, schrieb Bob Camp:
> Hi
>
> At least on the 53131, the first sign of wear out was an error message. I believe it was a self test message (checksum error). I could easily be wrong about that. We blew them out within 9 months of when they were first introduced. That was a long time ago.
>
> Bob
>
> On Apr 24, 2013, at 3:43 AM, Volker Esper<ailer2 at t-online.de>  wrote:
>
>    
>> How do I recognize a wear out? Does the receiver send an error message every time I try to change the NVRAM or do I have to ask it?
>> Volker
>>
>> Am 24.04.2013 00:08, schrieb Mark C. Stephens:
>>      
>>> Thanks Ulrich, Much Appreciated, prefer to use your software.
>>>
>>> Thanks Again,
>>> mark
>>>
>>> -----Original Message-----
>>> From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On Behalf Of Ulrich Bangert
>>> Sent: Tuesday, 23 April 2013 5:36 PM
>>> To: Time nuts
>>> Subject: [time-nuts] Z38XX
>>>
>>> Gentlemen,
>>>
>>> due to the discussion that evolved concerning Z38XX i looked up the sources and found that indeed every time the current time is read using a
>>>
>>> :PTIM:TCOD?
>>>
>>> a
>>>
>>> :PTIM:TCOD:FORM F2
>>>
>>> is sent in advance to make the receiver answer in the format that Z38XX needs. I have not been aware that this could lead to NVRAM wear out but have been thinking this simply sets the format of the next output. I have changed the software so that the FORM F2 command is now only written once after program start. The software can be downloaded from the usual place but I have currently no time to test it.
>>>
>>> My own experiences with NV memory that can only be written for a limited number of times  (EEPROM on ATMEL processors) indicates that a clever made NV writing routine would first compare the NV contents to what shall be written on a byte by byte base and write only changed bytes.
>>>
>>> Best regards
>>>
>>> Ulrich Bangert
>>> www.ulrich-bangert.de
>>> Ortholzer Weg 1
>>> 27243 Gross Ippener
>>>
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>>
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