Kenwood DP-1100 B, Руководство по обслуживанию

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DP-1100B II
2. IC OPERATION OF EACH CIRCUIT AND PIN DESCRIPTION
T a b l e 2 - 3 - 4 A
9 3
Pin No. Symbol I/O Waveform Description Remarks
29 ALGC I
-
Process selection input of C2 correction section. Selects the process
algorithm for the frame in which detection of error symbol is not
possible in C2 correction section. It is " L " in normal operation.
Connect to system
GND.
(Normal position)
3 0 - 3 3
AT=0~
AT-3
I/O
-
Digital attenuator I/O controlled by signal WDCK
W D C K = " L " , outputs internal digital attenuator level
W D C K = " H " , reads external control data for digital attenuator.
(AT-3 is not connected.)
34 MUT-1 I
-
Muting control input of the automatic control section of the internal
digital attenuator.
At " L " , attenuation amount increases (finally, it becomes digital
" 0 " ) . At " H " , attenuation amount decreases (it shifts to 0 dB side).
35
MUT-01 0
-
Muting 1 output. Outputs an " L " signal when burst error over 64
frames or buffer-over of jitter absorption memory is detected.
36 MUT-02 0
-
Muting 2 output. Outputs an " L " signal when deinterleave error is
detected over 3 continuous frames.
37 I
-
C )utput data parallel/serial selection input.
37
P/S SE
I
-
C
L" = parallel o u t p u t , | " H " = serial output.]
38 DA-0 0
-
Not connected 38 DA-0 0
-
P/S SE = " L "
P/S SE = " H "
Not connected 38 DA-0 0
-
Outputs LSB of 8-bit data. Outputs serial data from LSB.
Not connected 38 DA-0 0
-
Not connected
39
DA-1
0
-
Not connected 39
DA-1
0
-
P/S SE = " L " P/S SE = " H "
Not connected 39
DA-1
0
-
Outputs the second bit from
LSB of 8-bit data.
Outputs correction flag of 8
bits of MSB side.
Not connected 39
DA-1
0
-
Not connected
40 DA-2 0
-
Not connected 40 DA-2 0
-
P/S SE = " L " P/S SE = " H "
Not connected 40 DA-2 0
-
Outputs the third bit from LSB
of 8-bit data. Outputs correction flag of 8
bits of LSB side.
Not connected 40 DA-2 0
-
Not connected