User manual

8X96 ADC and DAC User Manual Page 6 of 54
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8X96 ADC – Quick Start
Input select
ANALOG = A/D converter
switches
Analog inputs. Nominal balanced +4dB
level. Consumer -10dBV level can be
achieved by turning the level trimpots
up and, connecting sleeve to pin 1 and
pin 3 and tip to pin 2.
T
his BNC jack outputs Wordclock- a TTL
level signal = FS and phase locked to
i
ncoming sample clock. If AES/EBU input is
s
elected the clock is stripped from pair #1/2.
A 75 Ohm
terminating resistor can be switched in via
jumper inside.
Wck for 88/96 kHz can be either 88/96 or
44/48 (see “dip switch”).
Wordclock is a TTL
level signal = FS.
Wck for 88/96 kHz
can be either 88/96 or
44/48 (see “dip
switch”)
ADC sync clock can be either internal (preffered for
sound quality) or external wordclock. The 75 Ohm
termination resistor ( default=off) can be switched
on by internal jumpers next to the BNC jack.
For 88.2Khz select 44.1k and Hi-Speed X2 switch.
Similarly 96kHz is 2x48kHz.
External wck for 88/96 kHz can be either 88/96 or
44/48 (see “dip switch”)
High performance SuperShaper HR ™ noise shaping
algorithm provides extremely transparent and
e
ffective wordlenght reduction preserving practically
a
ll 24 bit resolution on 20 bit output and most of it on
16 bit out. See “Noiseshaping”.
Lock leds indicate lock of pairs of digital
inputs. Note that for 8 channel DIO
interfaces there is one common clock, AES
pairs have to be synchronous to be properly
converted to another digital format.
-20dB and -0dB peak
leds display the peak
signal level relative to 0
dBFS. Red means 1 or
more samples=0dBFS
Input level adjustment. Nominal
0VU=+4dB=1.225VRMS=-
18dBFS
Can be adjusted +12/-6dB
2
2
0
1
10
Mode of MRX codec
- turn it off if you are
not using MRX.
Relevant to TDIF
Only.
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”)
U
p 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
Hi-speed AES/EBU
inputs lock to signals
of 25-100kHz FS.
Standard 110 Ohm,
balanced, transformer
isolated
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
Setting up the 8X96 ADC 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 the sleeve to pin 1 and pin 3 tied together and the ring to pin 2.
If an external house clock is used, make sure that the clocks are properly fed and
terminated (75 Ohm) if necessary, especially for long cable runs.