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Hi All,
In deal with DTMF measurement, it is closely related to the line impedance.
In EU, it is a complex impedance, and in US it is 900ohm. But in which occasion, we use 600 ohms, please advise?
dsl amplifier
I also deal with this kind of technical problem, how the DSL filter is quite interesting for me.
(1) Impedance matching ?
(2) Insertion loss ?
Re: Watch Dog Timer
It is a concept (maybe implemented as software and/or hardware).
Whenever there have a dead loop or other issue, the system will reset itself to exit from the dead loop. There should be many different types of implementation.
Re: Why Sine waves are only choosen for the generation of DT
There have a limited bandwidth allocated for the voice band by telephone company. So, if we use square wave, it will cause some misdetection.
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