Toa EXES-6000, Эксплуатация и устранение неисправностей

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Here we show the voice signal flow of Fig. 13
where stations A and B are conversing with each
other. For timing of each switch, refer to Fig. 14.
— Timing "1" —
(1) Switches Tx
1
and Ry
1
close at the timing "1"
1-4
and R x
1 - 4
.
(Marked in red in the Figs. 13 and 14)
(2) The voice signal from the microphone of
station A is transmitted to LINK No. 1 via Tx
1
,
HW-T line and Ty
1
. The signal between Tx
1
and Ty
1
is the PAM signal. Now that Rx
2
is left
open at this timing, the signal delivered to
LINK No. 1 will not go beyond this LINK where
the signal is held with a holding capacitor in
order to be demodulated into the original
voice signal. See section 3-3 "Demodulation
of PAM Signal".
— Timing "2" —
(3) Switches Tx
3
and Ry
3
close at this timing.
(Marked in green in the Figs. 13 and 14)
The signal from station A held at LINK No. 1 is
transmitted to the speaker of station C via
Rx
2
, HW-R and Ry
3
. The signal between Rx
2
and Ry
3
is the PAM signal. The signal from the
microphone of station C is, in the same
manner as described in (1) and (2) above,
delivered to LINK No. 1 and held there.
— Second Timing "1" —
(4) The signal from station C held at LINK No. 1 is
sent out to the speaker of station A in the
same manner as in (3) above.
Since the timings "3" and "4" have no
relations with LINK No. 1, they are omitted
from this example.
— 9 —
among the timings of
Ty