[time-nuts] Z38XX

[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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