ROSTEC ADIS8 User manual
Christianehøj 43, 2860 Søborg, Denmark
Development and Manufacturing of Digital Video and Audio Equipment for Broadcast and Recording Industry
ROSTEC ADIS8
AES Distribution Amplifier for
GPU frame
General description
The ADIS8 is an AES Distribution amplifier with
eight individually buffered outputs.
It is intended as an extension to the various
Reference Generators installed in the GPU
frame, but it is also able to distribute the digital
audio outputs from A/D and SR converters.
Further, it has an external AES input enabling
the ADIS8 to distribute an incoming signal, not
generated in the GPU frame environment. The
signal can be a digital audio AES or a blank
AES for synchronization purposes.
The ADIS8 is compatible with sampling
frequencies up to 108 kHz.
Outputs
There are eight AES outputs available on the
sub-d connector on the back panel of the GPU
frame. All outputs are individually buffered and
transformer balanced, having the transformer
center-grounded at the IC side and floating at
the line output side.
The output impedance is 110 Ohms as called
for in the AES/EBU specifications
GPU bus input
GPU input is the normal mode. A jumper on the
PCB selects GPU input or external input.
External input
The external input is transformer balanced,
having the transformer grounded at the IC side
and floating at the line input side.
Pulse shaping is performed by means of an
input Schmitt Trigger with 0,3V hysteresis.
The input impedance is 110 Ohms as called for
in the AES/EBU specifications
Note that when the external input mode is
selected, output CH 8 on the back panel
connector is changed to input.
Thus only seven outputs are available when
this mode is selected.
Christianehøj 43, 2860 Søborg, Denmark
Development and Manufacturing of Digital Video and Audio Equipment for Broadcast and Recording Industry
Block schematic
Input output connections
Christianehøj 43, 2860 Søborg, Denmark
Development and Manufacturing of Digital Video and Audio Equipment for Broadcast and Recording Industry
Electrical specifications:
Inputs : GPU Bus signals
: AES balanced 110 ohms RS422
Outputs : 8 x AES11 transformer balanced 110 ohms RS422 (GPU mode)
: 7 x AES11 transformer balanced 110 ohms RS422 (ext. input mode)
Fs range : 25 kHz to 108 kHz
Frequency range : 1 MHz to 15 MHz
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