AC2496
24-bit analog to digital converter
The model AC2496 is the 24-bit analog to digital converter to convert 8 analog inputs to
ADAT or S/P DIF. It can add 8 more analog inputs to D1624 or 16 more to D2424 (with
optional model 8355 8ch A/D card) via ADAT that enables 16 tr or 24 tr simultaneous
recording respectively, most effective for live recording with Fostex D-series. Via S/P DIF, 2
analog inputs can be converted and sent on 24-bit/96kHz format. It is one of the most cost
effective units amo ng the analog to digital converters in the market.
It is also useful for the customers who have PC based digital recorder to record analog
sources converted into ADAT by AC2496. Besides the standard ADAT output, 8 analog can
be converted into 24 bit/96kHz format and output via AES/EBU with model 5045 8ch
AES/EBU card.
Currently not so many soundcard support 8 tr simultaneous recording on 24 bit/96kHz format
but it should be the future professional standard. AC2496 is ready for it with 5045. Both
optional cards can be installed by end user.
Other features are as follows.
Ø The high quality A/D converters AK5393 (24-bit, 128 times oversampling, delta-sigma
Ø modulation complying to up to 108kHz sampling frequency) by AKM which are also
used for
Ø D2424 are applied.
Ø Unbalanced/balance inputs are selectable (-10dBV/+4dBu). Input reference levels are
Ø also selectable (-12dB, -18dB, -20dB).
Ø 4 digital formats: 24bit/44.1kHz, 24bit/48kHz, 24bit/88.2kHz (S/P DIF),
24bit/96kHz (S/PDIF).
Ø Word In/Out to secure sync on ADAT.
Specifications AC2496
Analog Input (1-8) : TRS phone jack x 8 (balanced/unbalanced selectable)
Reference Level : -12dB / -18dB / -20dB selectable
Input Level : +4dBu (balanced) / -10dBV (unbalanced)
Impedance : > 10k ohm
Digital Out (1-8) : optical x 1
Format : IEC 60958 S/P DIF
Alesis Proprietary Multi Channel Digital Interface (ADAT)
Word Input : BNC connector, TTL level, 75 ohm (terminate on/off)
Output : BNC connector, TTL level, 75 ohm
Sampling Frequency : 44.1kHz / 48kHz / 88.2kHz (S/P DIF) / 96kHz (S/P DIF) selectable
Quantization : 24bit
Frequency Response : 20 – 20kHz +/-1dB (fs=44.1kHz) 20 – 43kHz +/-2dB (fs=96kHz)
S/N Ratio : > 110dB (typical) at Balanced, Reference Input -12dB
Dynamic Range : > 110dB (typical) at Balanced, Reference Input -12dB
T.H.D. : < 0.004% at Balanced, Reference Input –12dB, 1kHz
Power Requirements : 120VAC, 230VAC / 18W
Dimensions : 482(w) x 44 (h) x 230 (d) mm
Weight : 2.5 kg
5045
Input/Output
Analog Input (9-16) : TRS phone jack x 8 (balanced/unbalanced selectable)
Reference Level : -12dB / -18dB / -20dB selectable
Input Level : +4dBu (balanced) / -10dBV (unbalanced)
Impedance : > 10k ohm
Digital Out (9-16) : optical x 1
Format : IEC 60958 S/P DIF/Alesis Proprietary Multi Ch annel Digital Interface
8355
Digital Out (1-8) : XLR-3-32 type x 4 (pin 2:hot)
Format : AES/EBU
APPLICATION EXAMPLES
1) 16 track simultaneous recording on D1624
8 analog
Word clock
adat optical
INPUT OUTPUT THRU
REMOTE
INPUT
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
RISQUE DE CHOC ELECTRIQUE NE PAS OUVRIR
SCSI
ON OFF
ANALOG INPUT
WORD
75Ω
234
51678
678
OUTPUTINPUT
OFFON
234
135141516
DIGITAL/DATA AC INANALOG OUTPUT
OPTICAL
91101112
AVIS:
OUTPUTINPUT
8 - 116 - 9 8 - 1 16 - 9
MIDI
THRU
100Ω
WARNING:
TO REDUCE THE RISK OF FIRE OR ELECTRIC
SHOCK, DO NOT EXPOSE THIS EQUIPMENT
TO RAIN OR MOISTURE.
8 analog
2) 24 track simultaneous recording on D2424 with 5045
8 analog 8 analog
adat optical
9101112
21222324
WORD
OUTPUTINPUT
MIDI
INPUT
THRUOUTPUT
ON OFF
75Ω
Word clock
5678
17181920
SCSI
CAUTION
RISK OF ELECTRIC SHOCK
DO NOTOPEN
RISQUE DE CHOC ELECTRIQUE
AVIS:
NE PAS OUVRIR
WARNING:
TO REDUCE THE RISK OF FIRE OR ELECTRIC
SHOCK, DO NOT EXPOSE THIS EQUIPMENT
TO RAIN OR MOISTURE.
1234
13141516
REMOTE
RS422
ON OFF
100Ω
THRU
AC-IN
8 analog
adat optical
ANALOG INPUT BAL [ +4dBu ] / UNBAL [ -10dBV ] ANALOG OUTPUT BAL [ +4dBu ] / UNBAL [ -10dBV ]
DIGITAL/DATA
INPUT
16 - 924 - 17 8 - 1
1234
5678
OUTPUT
16 - 924 - 17 8 - 1
3) 24bit/96kHz recording on S/P DIF
S/P DIF optical
PC with
Soundcard
Word clock
2 analog
4) 8ch simultaneous recording on 24bit/96kHz
8 analog
Word clock
AES/EBU
x4
PC with
Soundcard
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