Studer D19m, Service Instructions Manual, Page: 36 / 100

D19m Technical Description
E2
2
D19m
Date printed: 28.10.02
2.1.3 D19m C4DA/24/96 – Quad 24 bit D/A, 96 kHz Operation
1.940.571
The C4DA/24/96 card can be used for standalone applications as well as in
the D19m rack for TDM application. On one card, four digital channels are
converted to four analog outputs. The converters receive their input signals
either from the AES/EBU inputs (standalone application) or from the
TDM bus.
The C4DA/24/96 card can be used next to the other D19m cards in a
D19m rack. If in standalone applications the synchronization should fail,
the clock will be generated from one of the AES/EBU inputs.
The channel status bits contain the source channel defined by the card
address as well as the sampling frequency information.
96 kHz Operation: The card can be used for sampling frequencies of 32 through 48 kHz. For
standalone operation, also twice these values are allowed. When using the
AES/EBU inputs in standalone mode, only the mode with two channels per
line (transmitted with twice the transmission speed) is supported, but not
the mode with one channel per line (CH1 in AES/EBU format corresponds
to the first, CH2 to the second sample).
Jumper diagram of the earlier version 1.940.570 at the end of this chapter.
AES
REC
AES
REC
D/A CONVERTER
+ DEEMPHASIS
AES IN 1
AES IN 2
AES DARS
SYNC IN
AES
REC
CONTROLLER
SHIFT
REG
CLOCKS
TDM BUS
LOW PASS
FILTER
LINE OUT 1
LINE OUT 3
LINE OUT 4
D
A
D
A LINE OUT 2
SUPPLY
SYNC:
AES1
EXT
AES2
CH 4
CH 3
CH 2
CH 1
0.
..2
6
dB
u
15
d
Bu
21
d
Bu
va
ria
bl
e
fin
e
ad
ju
st
AES TTL
SYNC
COMMON
48 k
SINGLE
96 k