Discussion:
Symmetricom TS2100 Faults and Forgetfulness
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Chris Quayle
2018-12-06 00:13:51 UTC
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Hi,

Thanks for all the replies. Looked into the Heol replacement gps
module, bit bullet and ordered one. Arrived today and on re
power up, the system was tracking 8 satellites 3D in 3 or 4
minutes. Quite impressive really and a great improvement on the
original module, even without the firmware issues.

Still have the power down / losing setup fault. If it's powered
down, the next power up shows cleared network info, ip, mask
and route etc, together with rubbish on the display.May be other
parameters as well, but my guess is that it's reverting to
defaults, perhaps because of a checksum fault in the firmware
or eeprom. Will try re installing the firmware, which I updated
to the final version sometime ago, but apart from that, no idea
what the fault might be.

Eeprom dump included. If another member has one of these, do
these values look sane ?. No idea of function though...

Regards,

Chris

35 ? root eng eeprom
36 ? read
fe 55 73 7c 00 00 00 46
33 30 30 30 30 30 32 31
00 00 00 00 00 00 00 00
00 a0 6e 04 14 4a 56 43
58 4f 00 00 00 00 00 00
00 00 00 00 00 00 ff ff
ff ed 00 00 00 14 3f 7f
df 03 00 04 00 00 00 00
00 24 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00

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Esa Heikkinen
2018-12-06 08:42:54 UTC
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Post by Chris Quayle
Eeprom dump included. If another member has one of these, do
these values look sane ?. No idea of function though...
I think IP address or display settings cannot be stored to that EEPROM,
it contains oscillator steering parameters etc. That is because this
EEPROM is write protected by jumper JP4, so any user settings cannot be
there. You only need to edit the EEPROM content if you change to
different oscillator. To do any changes there JP4 must be shorted to
enable writing.

From my TS2100 I have stored two EEPROM dumps:

With original TXCO:
0e 5b 45 4b 00 00 00 46
31 30 34 30 38 30 37 39
00 00 00 00 00 00 00 00
00 a0 6e 04 1f d3 56 43
58 4f 00 00 00 00 00 00
00 00 00 00 00 00 ff ff
ff eb 00 00 00 02 3f 73
33 33 00 04 00 00 00 00
00 24 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00

After upgrading MTI OCXO:
a5 73 9b 52 00 00 00 46
31 30 34 30 38 30 37 39
00 00 00 00 00 00 00 00
00 a0 6e 04 1f d3 56 43
58 4f 00 00 00 00 00 00
00 00 00 00 00 00 ff ff
ff eb ff ff ff ec 3f 7f
df 3b 00 04 00 00 00 00
00 24 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00

So there must be some other place to store the user data. I would look
if there's more EEPROMs on the board and does they have write protect
jumpers also. Erratic jumper setting there could prevent storing any
changes. It may also be faulty eeprom.
--
73s!
Esa
OH4KJU

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Chris Quayle
2018-12-07 00:42:55 UTC
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Esa Heikkinen
I think IP address or display settings cannot be stored to that EEPROM,
it contains oscillator steering parameters etc. That is because this
EEPROM is write protected by jumper JP4, so any user settings cannot be
there. You only need to edit the EEPROM content if you change to
different oscillator. To do any changes there JP4 must be shorted to
enable writing.
0e 5b 45 4b 00 00 00 46
31 30 34 30 38 30 37 39
00 00 00 00 00 00 00 00
00 a0 6e 04 1f d3 56 43
58 4f 00 00 00 00 00 00
00 00 00 00 00 00 ff ff
ff eb 00 00 00 02 3f 73
33 33 00 04 00 00 00 00
00 24 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
a5 73 9b 52 00 00 00 46
31 30 34 30 38 30 37 39
00 00 00 00 00 00 00 00
00 a0 6e 04 1f d3 56 43
58 4f 00 00 00 00 00 00
00 00 00 00 00 00 ff ff
ff eb ff ff ff ec 3f 7f
df 3b 00 04 00 00 00 00
00 24 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
So there must be some other place to store the user data. I would look
if there's more EEPROMs on the board and does they have write protect
jumpers also. Erratic jumper setting there could prevent storing any
changes. It may also be faulty eeprom.
-- 73s! Esa OH4KJU
Here's mine again:

fe 55 73 7c 00 00 00 46
33 30 30 30 30 30 32 31
00 00 00 00 00 00 00 00
00 a0 6e 04 14 4a 56 43
58 4f 00 00 00 00 00 00
00 00 00 00 00 00 ff ff
ff ed 00 00 00 14 3f 7f
df 03 00 04 00 00 00 00
00 24 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00
00 00 00 00 00 00 00 00


Already replaced the oscillator a while back. Comparing the
output to a gps 10Mhz, the original was jittering all over the
place and not very nice on an sa either. Didn't have the exact fit, but
did have a small ovenised vcxo which had the right vcc and control
range. Epoxied that the the board, but had to add a squarer (a
single transistor) as it had a sine wave op. So, it's been hacked
around a bit already.

One thing I did notice in the eeprom, 4th line down, first six bytes, is
the ether mac address, but haven't edited any parameters as yet. Right
now, it's running on a ups, along with a couple of other what I call,
"essential loads" :-).

As for user setups, from memory, there are two eeproms on the board,
so may swap the other item to see if it fixes the fault...

Regards,

Chris

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