[time-nuts] Re: Firmware WNRO fix for S300/S350 and XLi

[Alex Forencich]

I suspect it might be possible to modify the firmware update packages 
for the S200/S250/S300/S350 to install the patched HCS12 firmware as 
part of the update process, without the need for a USBDM cable.  I can 
take a crack at this if anyone has the latest firmware update packages 
for these units, or knows where to find them (I updated my unit via CF 
card images that were posted by someone on the EEV blog.  So it seems to 
work to update the main system firmware, but it doesn't kick off reflash 
of the HCS12).

Alex Forencich

On 6/1/24 20:23, Tom Verbeure via time-nuts wrote:
> Using the same trick as Alex’s solution (giving a time hint), I also got my SyncServer S200 with Furuno GT-8031 working again with interposer hardware and firmware.
>
> The total cost is around $30 as well, but requires some experience with soldering 0603 resistors and connectors with a 1.27mm pitch.
>
> But it works great and it’s much cheaper than those $200 ublox replacements.
>
> Tom
>
>> On Jun 1, 2024, at 5:47 PM, Gregory Beat via time-nuts <time-nuts at lists.febo.com> wrote:
>>
>>    
>>
>>    Microsemi released their notice on the SyncServers in 2022.
>>
>>    Useful as background.
>>
>>    One Florida eBay seller is upgrading units with a uBlox receiver.
>>
>>    This audiophile / broadcast reseller was unaware of WNRO, a decade ago.
>>
>>    —
>>
>>    Customer Advisory Notice, August 1, 2022
>>    [1]https://my.microsemi.com/AWelcome/SyncServer S2xx S3xx September 18
>>    2022 internal week number rollover FSB v2.pdf
>>    ==
>>    Date: Thu, 30 May 2024 07:52:51 +0000
>>    From: Alex Forencich <alex at alexforencich.com>
>>    Subject: [time-nuts] Firmware WNRO fix for S300/S350 and XLi
>>    To: time-nuts
>>    As many folks on this list are probably aware, the GPS week number
>>    rollover (WNRO) periodically causes older GPS receivers to misbehave.
>>    One solution is to replace the problematic GPS module with a newer
>>    one.
>>    But many of these older modules will still work, they just need a bit
>>    of
>>    help, in the form of providing a hint about the current year.
>>
>> References
>>
>>    1. https://my.microsemi.com/AWelcome/SyncServer S2xx S3xx September 18 2022 internal week number rollover FSB v2.pdf
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