[time-nuts] Re: Symmetricom XLi question

[Todd Smith]

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.

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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