[time-nuts] Question about Firmware for EIP Counters

[J. Forster]

Try the EIP_Microwave Group on YahooGroups.

-John

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> Is anyone on the list familiar with the firmware for EIP 578 or 548 series
> counters?  I have a favorite 578 counter, with power measuring  option,
> that I have owned for years.  All of this time I have wished it had  the
> Frequency Extension option.  Recently I bought a mechanically-damaged  578
> with
> the desired extended frequency range feature on eBay.  I removed  the
> optional
> RF parts and added them to my old counter.  I also  transferred the
> associated firmware PROM (U20) to my counter's A-105  microprocessor
> board, and
> added the jumper required to activate the feature on a  second board.  But
> the
> option failed to work.  By pressing buttons I  determined the cause was a
> firmware rather than RF problem.
>
> While my old firmware set of 5 PROMS was Version-B, the "parts"  counter
> had Version-D PROMS, even though it was not far removed in  serial number
> and
> bore the same CCN code.  So I transferred the remaining  Version-D PROMS
> to
> my counter and presto! the frequency extension option worked  great!
> However, before I could celebrate by closing the case, I realize  the
> prized power
> measurement feature no longer worked.  I tried  interchanging the first
> then last PROMs in the programming sequence, but this  just caused the
> microprocessor to lock-up.  I am left with the feeling  that the various
> firmware
> versions might correspond to the eight  permutations of the three options
> requiring microprocessor intervention (A to  D Converter, Power Meter, &
> Frequency Extension).  If this is the  case, my augmentation project seems
> doomed
> unless I can obtain a copy of  the appropriate firmware.  Has any list
> member
> had experience adding  options to the EIP counters of this family?   I
> have
> already  asked this question on the Microwave Reflector, but with no
> responses.
>
> Bruce Hunter, KG6OJI
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