[time-nuts] Symmetricom TS2100 Faults and Forgetfulness

[Esa Heikkinen]

Chris Quayle kirjoitti 6.12.2018 klo 2:13:

> 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