User manual

8X96 ADC and DAC User Manual Page 21 of 54
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8X96 DAC – Quick Start
Input selector switch
Analog outputs. Nominal balanced +4dB level.
Consumer -10dBV level can be achived by turning
the level trimpots down and, connecting sleeve to
pin 1 and ring to pin 2. Leave pin 3 unconnected.
Do not ever short any pins to ground.
This BNC jack can output AES11 Sync signal or
W
ordclock. Switchable inside via jumpers. Wordclock is
d
efault. Wordclock is a TTL level signal = FS and phase
locked to incoming sample clock. If AES/EBU input is
s
elected the clock is stripped from pair #1/2. A 75 Ohm
t
erminating resistor can be switched in via jumper inside.
Up to Digital Input-Output Interfaces can
be installed (apart of standard AES/EBU).
These interfaces are daughter cards
manufactured by Mytek and can be:
-ADAT with S/MUX 96/24 recording
-TDIF with S/MUX 24/96 and Prism MRX Bitsplit
-Sonic HDSP/USP
-Protools ® compatible
-Sadie / dual AES
two
Mode of MRX codec
- turn it off if you are
not using MRX.
Relevant to TDIF
Only.
DAC sync source. Normally “DIG IN” .
See “DAC - internal sync” if you need a
completely jitter immune D/A
conversion
Some DIO interface cards such as ADAT
and TDIF have 2 sets of 8 chan DIO - A
and B. In regular speed mode, this switch
selects either port A or B. In high speed
mode and w/MRX
and S/MUX modes (see “dip switch”)
Dual function leds.
If MRX is selected led display
detected mode of MRX encoding and its compatibility
with MRX switch setting. (see “Bitsplitting”)
Normally leds display the
wordlenght of the signal.
Hi-speed AES/EBU
inputs lock to signals
of 25-100kHz FS.
Standard 110 Ohm,
balanced, transformer
isolated
Lock leds indicate lock of pairs of digital inputs. Note
that for 8 channel DIO interfaces there is one
common clock, while AES/EBU pairs can be
converted to analog independently (asynchronously).
However, AES pairs have to be synchronous to be
properly converted to another digital format.
Hi-speed AES/EBU outputs for signals of 25-
100kHz FS. Standard 110 Ohm, balanced,
transformer isolated implementation. As all
outputs they repeat selected input. If “AES IN” is
selected, the signal is a reclocked (jitter
reduced) clone i.e. all bits and flags are exactly
repeated. If other DIO is selected, certain flags
may not be repeated.
(See “Digital format conversion”)
Sampling frequency range:
Reg= 25kHz - 50kHz
Hi= 50kHz - 100kHz
Switch automatically engages S/MUX on
ADAT and TDIF
-20dB and -3dB peak
leds display the peak
signal level relative to 0
dBFS.
Output level adjustment. Nominal
0VU=+4dB=1.225VRMS=-
18dBFS
2
2
0
1
10
Setting up the 8X96 DAC is fairly straightforward- install the unit in the rack, and make
all necessary connections. If you rack frame is grounded, you may consider evaluating
inter-equipment ground connections and power cord grounding. If unbalanced audio is
involved, connect sleeve to pin 1 and ring to pin 2. Leave pin 3 floating. If an external