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D824/D1624 Reference Manual (Maintenance/Specifications)
134
Specifications
RECORDER SECTION
Recording Medium : 3.5 inch, E-IDE type hard disk
External SCSI device (SCSI-2 unbalanced transfer)
Recording Format : FDMS3 version 2
Save/Load Format : SCSI, FDIO-1 version2
Sampling Frequency : 44.1kHz, 48kHz, 96kHz
Quantization : 16bit / 24bit
Data Save/Load : SCSI (normal mode)
A/D Converter : 24bit Delta Sigma 128 times over sampling
D/A Converter : 24bit Delta Sigma 128 times over sampling
No. of Recording Tracks (D824) : 24 (8 real tracks + 16 additional tracks)
No. of Recording Tracks (D1624) : 24 (16 real tracks + 8 additional tracks)
No. of Simultaneous Recording Tracks (D824) : 8 (analog/digital in)
No. of Simultaneous Recording Tracks (D1624) : 8 (analog), 16 (digital in)
No. of Simultaneous Reproduce Tracks (D824) : 8
No. of Simultaneous Reproduce Tracks (D1624) : 16, 8 (at 96kHz/24bit)
No. of Programs : 99
No. of Locate Memories : 100
Pitch Control : +/- 6% (0.1 step)
Crossfade : 10msec, 5msec (at 24bit/96kHz)
R/P Frequency Response : 20Hz to 20kHz +/-1dB
20Hz to 43kHz +/-2dB (at fs:96kHz)
Dynamic Range : More than 108dB (typical)
Channel Separation : More than 80dB (at 1kHz, 0dB, 24bit)
T.H.D. : Less than 0.004% (1kHz, -12dB) (typical)
INPUT/OUTPUT
Analog Input
Connector (1 to 8) : RCA pin jack
Input Impedance : More than 10k ohm
Reference Input Level : -10dBV
Analog Output
Connector (D824: 1 to 8, D1624: 1 to 16) : RCA pin jack
Load Impedance : More than 10k ohm
Reference Output Level : -10dBV
Data In
Connector (D824: 1-8, D1624: 1-8, 9-16) : Optical
Format : IEC 958 Part3 (S/P DIF)
Alesis Proprietary Multichannel Optical Digital Interface
Data Out
Connector (D824: 1-8, D1624: 1-8, 9-16) : Optical
Format : IEC 958 Part3 (S/P DIF)
Alesis Proprietary Multichannel Optical Digital Interface
WORD Input
Connector : BNC
Input Level : TTL level
WORD Output
Connector : BNC
Output Level : TTL level
RS-422
Connector : D-sub 9pin
Protocol : Sony 9pin protocol, ES buss
RS-422 THRU
Connector : D-sub 9pin
Output : Direct output of RS-422
MIDI In/Out/Thru : DIN 5pin
Punch In/Out : 6mm dia phone jack (option model 8051)
SCSI Port : D-sub 50pin (half pitch)
Maintenance
Cleaning the exterior
* For normal cleaning, use a soft dry cloth.
For stubborn dirt, moisten a cloth in diluted detergent, wring it out firmly, and wipe the dirt off.
Then polish with a dry cloth. Never use solvents such as alcohol, thinner or benzene, since these will
damage the printing and finish of the exterior.