[time-nuts] Re: Symmetricom XLi question

[Warren Kumari]

On Tue, Sep 27, 2022 at 8:18 PM, Todd Smith <time-nuts at lists.febo.com>
wrote:

> My S300 Furino GT-8031H rollover on September 18 at 00:00 UTC. There is a
> Microsemi article that said that those GPS receivers survived the 2019
> Number of Week rollover but the internal representation would rollover now.
>
> I ordered Jackson Labs units to replace them and I really like them. Very
> solid design with superior features.
>


Excellent! Can I ask where you ordered them from and roughly how much they
were?
I've tried  contacting Jackson Labs a few times, both through the form on
their website and via email to purchase, but haven't heard back yet.
They look like really nice units, and I need one to replace a "Pentar
SA101" (a Furuno on an adaptor) in my Symmetricom S250.

It looks like Synergy GPS also still sells a M12M compatible board, but
their lead time is 20 - 30 weeks.

W


> Todd
>
> On Tue, Sep 27, 2022, 17:20 Mark G Thomas via time-nuts < time-nuts at lists.
> febo.com> wrote:
>
> Hi,
>
> I now have two 87-8028-2 boards, both with Furino GT-8031H on them, both
> which get stuck for days UNLOCKED, in state "TRAIM ACTIVE". I have ordered
> Jackson Labs M12Ms to upgrade them.
>
> F119 b1 s
>
>
> F119 B1:
> GPS PART NUMBER 87-8028-02
> SOFTWARE 230-01510-04v1.20
> FPGA 184-8024v1
> GPS STATUS UNLOCKED
> GPS ANTENNA OK
> GPS ACQUISITION STATE: TRAIM ACTIVE
>
>
> This might mean more XLi units showing up, and cheaper, on e-bay, if these
> GPS units have hit some other rollover and no longer work at all.
>
> Info in this article was helpful, as it includes instructions for
> displaying the web usernames and passwords if a prior owner changes them:
> https://www.eevblog.com/forum/testgear/symmetricom-xli-license-hack/
>
> Mark
>
> On Wed, Sep 21, 2022 at 04:48:52PM -0500, Steve Krull via time-nuts wrote:
>
> Mark,
>
> My XL took a good 24 hours to lock after it had been unpowered for who
>
> knows how long and moved half way across the country. It also has the
> 87-8028-2 gps receiver and was not affected by the week 1024 rollover.
>
> It’s a shame if the rb is dead; as many have said there’s no information
>
> on them.
>
> If anyone has one to let go of, I am looking for an 87-8028-2 gps
>
> receiver for an XLi SAASM that I got without the receiver. A list member
> offered me one pre-pandemic but he then seems to have gone silent.
>
> Steve K.
>
> On Sep 21, 2022, at 1:34 PM, Mark G Thomas via time-nuts <
>
> time-nuts at lists.febo.com> wrote:
>
> Hi,
>
> I just received an XLi from e-bay. It unexpectedly has the Rubidium
>
> standard, in addition to the GPS receiver 87-8028-2.
>
> I have not yet determined if my 87-8028-2 is affected by the week 1024
>
> rollover bug. After 12 hours it has finally transitioned from "SITE
> SURVEY" to "TRAIM ACTIVE", but still not GPS locked.
>
> Claude -- which exact Jackson Labs part did you use?
>
> Unfortunately the X72 RUBIDIUM OSC is in FAULT state.
>
> I am interested in any recommendations about what to do about the
>
> failed rubidium. My next steps will be to check supply voltages and pull
> out the 87-8028-2 to see which GPS module it has, but I was hoping it would
> get GPS lock before I shut it down again.
>
> F18
>
>
> F18 BOOTLOADER 192-8000
> SOFTWARE 192-8001
> FILE SYSTEM 192-8002V2-4
> PROJ REV # 2-4
> FPGA # 184-8000V65
>
>
> F72
>
>
> F72 CLOCK PLL LOCKED
> CLOCK STATUS UNLOCKED GPS PRI
> PRIMARY POWER SUPPLY OK
> SECONDARY POWER SUPPLY OK
> RUBIDIUM OSC FAULT
>
>
> F108
>
> F108 OSCILLATOR CONFIG RUBIDIUM
>
> f60 b1 tracked
>
>
> F60 B1 prn2 good tracked -153dBW
> F60 B1 prn5 good tracked -154dBW
> F60 B1 prn6 good tracked -155dBW
> F60 B1 prn9 good tracked -157dBW
> F60 B1 prn11 good tracked -154dBW
> F60 B1 prn12 good tracked -154dBW
> F60 B1 prn13 good tracked -196dBW
> F60 B1 prn19 good tracked -162dBW
> F60 B1 prn20 good tracked -154dBW
> F60 B1 prn25 good tracked -156dBW
> F60 B1 prn29 good tracked -156dBW
>
>
> f60 b1 current
>
>
> F60 B1 prn2 good current -154dBW
> F60 B1 prn5 good current -154dBW
> F60 B1 prn6 good current -155dBW
> F60 B1 prn9 good current -158dBW
> F60 B1 prn11 good current -153dBW
> F60 B1 prn12 good current -155dBW
> F60 B1 prn20 good current -154dBW
> F60 B1 prn25 good current -157dBW
> F60 B1 prn29 good current -156dBW
>
>
> Mark
>
> On 11/25/21 5:45 PM, va2hdd at ebox.net wrote:
>
> Hi Martin.
>
> In my XLi the GPS is in option bay 1.
>
> As far as I know you can put it in any free option bay, you will configure
> it in software at start up.
>
> In my case I had to replace the GPS receiver that was on the 87-8028-2
> option card, there was a week 1024 rollover bug issue on it.
>
> Personally I would take the time to test it with an antenna, as the
>
> late
>
> production units have a more recent GPS receiver card that has no rollover
> bug.
>
> In my case I used the Jackson Labs replacement board, and I warmly
> recommend it, it works flawlessly.
>
> Have fun with your XLi !
>
> Claude VA2 HDD
>
>
> On 2021-11-25 16:41, Martin Flynn wrote:
> Picked up a Symmetricom XLi with two A/C supplies and two empty
>
>
> slots.
>
>
> Question #1
> Is there a preference which of the two empty slots the GPS C/A Receiver
> (87-8028-2) is placed in?
>
>
> Question #2
>
> Anyone have slot covers sitting around?
>
> Martin
>
>
> --
> Mark G Thomas <Mark at Misty.com>, KC3DRE
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> --
> Mark G. Thomas <Mark at Misty.com>, KC3DRE
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