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RIP #01
23 ноября 1997 |
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Iron - Revision C-DOS modem which allows to get faksirovannoe input impedance of the telephone line.
We offer you a refinement of C-DOS modem, allowing us to obtain
a fixed input impedance for soglasoaniya the telephone line.
> To the relay
(1 C '+
(10.0
(
(R '560
> To "-" diode assembling
T1 2
Thus, the input impedance of the DC now
is not determined by the primary winding of the transformer T1,
and the resistance R '= 510 .. 680 ohms. Capacitor C 'may have
a capacity 10 .. 20 uF. Input and output signal modem with
virtually no experience distortion. This revision will be very
useful especially for suburban exchanges, coupled lines and
other cases, when the telephone line has a low load- ability,
so that the connection of multiple concurrent phone calls
strong "slack" in the line voltage. Remains add that this idea
was borrowed from the scheme of the Moscow C-DOS modem.
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