Changement EPROM

[ruddy]

Bonjour ,

J'ai réceptionné un ensemble Wadia WT-3200 ainsi que le dac dedié X-32.
Dans le colis se trouve une feuille "technical bulletin" une boite avec dedans une EPROM.
Après lecture du document il s’avère qu'il y a deux level d'accuracy (précision) soit :
L'accuracy 1 lock avec un ratio de 2500 à 1, EPROM présentement en place
L'accuracy 2 lock avec un ratio de 10 à 1.

Quel avantage de switcher sur l'EPROM 2 ?

Il faut une clé allen spécifique ?
Ce genre d'opération est elle facilement réalisable ?

De stereophile :

There have, however, been some problems in the field because of this circuit. Many people bought X-32s only to discover that they would not lock to their CD players' digital outputs. According to Wadia, the problem lies in CD players that do not meet the EIAJ specification for clock frequency accuracy and clock jitter. To be classified as "Level 1: High Accuracy," the source clock's jitter must be less than 20 nanoseconds (20ns or 0.00000002s), measured at the half-voltage points. If the CD player or DAT machine's digital output doesn't meet this criterion (with an additional tolerance of ±50%), the X-32 will reject the signal. Wadia has solved this problem by supplying with each X-32 an additional Read-Only Memory (ROM) chip. The socket-mounted ROM that comes in the unit configures the programmable gate-array chips described earlier. If the X-32 will not lock to your CD player, the ROM must be replaced with the extra chip supplied, which fortunately is very simple to do. The X-32 will now accept a wider range of digital inputs, but at the expense of less clock-jitter reduction: The 2500:1 jitter reduction with the stock chip becomes 10:1 with the optional ROM. This ability to adapt the processor easily to new or unexpected conditions exemplifies the flexibility of programmable gate arrays. With digital converter technology changing so rapidly, and in light of the immediate need to adapt to various transports, the decision to use gate arrays rather than fixed chips appears prudent.

Dois je comprendre qu'il faut rester sur  l'EPROM 1 ?

Merci

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