AEB4-I / AEB8-I: Analog Expansion Board for the DIGI96® series

4 / 8 analog inputs with 24 bit AD-converters!
AEB4-1ANALOG EXPANSION BOARD The AEB4-I (Analog Expansion Board) adds 4 analog inputs in professional quality to all ADAT capable cards of the DIGI96 series. Level adjustment +4 dBu/-10 dBV, 107 dBA SNR and a servo balanced input circuit deliver perfect sound and sonic clarity.

The AEB4-I is designed for maximum flexibility. Both stereo inputs 1/2 3/4 are automatically copied to channels 5/6 and 7/8. Installation is done in a convinient manner using the supplied bracket, or - as no contact to any slot on the motherboard is needed - at any place inside the computer. Nuts for all TRS jacks and a drilling template are included.
The AEB8-I offers 8 inputs with 4 stereo TRS jacks. Usual insert cable can be used to split the connectors from stereo jack to mono jacks. Level adjustment +4 dBu/-10 dBV, 107 dBA SNR and highest suppression of PC-noise guarantee perfect sound quality.
Technical Specifications and Features
  Input AEB4-I 4 x 1/4" TRS jack, servo balanced
  Input AEB8-I 4 x 1/4" TRS jack, unbalanced
  Dynamic ratio 104 dB (RMS unweighted), 107 dBA
  THD+N -95 dB (0.0017 %)
  Frequency response -0.1 dB: 10 Hz - 21 kHz
  Input level for 0 dBFS @ +4 dBu: +12 dBu
  Input level for 0 dBFS @ -10 dBV: +2 dBV
  Crosstalk > 110 dB
  Supported sample rates 32 kHz - 48 kHz
  Input impedance 10 kOhm
  Power supply uses 3.5" floppy connector, 12 V/5 V DC, 190 mA
  AEB needs no slot on the motherboard
  Standard bracket, board dimensions AEB4: 85 x 95 mm, AEB8: 120 x 95 mm
  1 internal cable 2-pin, 1 internal cable 3-pin, 1 power adapter cable 5 1/4" to 2 x 3.5" included
Operating the AEBs
Using the Analog Expansion Board is very easy to do, thanks to the clearly structured and informative Settings dialog of the DIGI96 series. The AEB operates like any other converter with ADAT output, but is connected internally. Therefore the input selector has to be set to 'Internal'.

The AEB gets its clock from the DIGI (thus works as slave). To avoid a clock loop the card has to be switched into 'Master' mode (field 'Clock Mode').

The Input Status display now shows the selected input (Internal), the current sample rate (44.1/48) and format (Adat).

Notes on Compatibility
DIGI96 Series

AEBs use the internal ADAT interface of the DIGI cards. Therefore they do not work with the DIGI96 (which did not support ADAT). To operate the AEB4-I and AEB8-I the used DIGIs must have the connectors ST6/7 on board (for the Word Clock Module). These were not present on the very first cards of the DIGI96 series (1998 to beginning of 1999).

One AEBx-I and one AEBx-O can be connected and operated simultaneously, in all possible combinations.

Hammerfall Series

An operation with the Hammerfall or Hammerfall Light requires board revision 1.5 or higher, because the internal connectors ADAT1Out, ADAT2Out and ST7 were not implemented in earlier versions.

One AEBx-I and two AEBx-O can be connected and operated simultaneously, in all possible combinations.