Crystal Vision
Introduction
TANDEM-200 User Manual R1.7
6
13/02/2008
The option card position for side 1 is at the top of the modules and the slot for side 2 is at
the bottom of the module. An 18 volt regulator option card is also required for analogue
input or output cards.
TANDEM-200 - sub-pcb or option card positions #1 and #2
The available option cards are:
•
DIP2 – 2 x AES/EBU inputs for synchronous 48kHz audio, 75 Ohm, 110 Ohm,
HiZ
•
DIP2RS – 2 x AES/EBU inputs with re-sampler for asynchronous audio (30 to
108kHz), 75 Ohm, 110 Ohm, HiZ
•
DOP2-110 – 2 x AES/EBU outputs, 110 Ohm balanced, AES reference input
•
DOP2-75 – 2 x AES/EBU outputs, 75 Ohm unbalanced, AES reference input
•
AIP2 – Analogue dual stereo audio input
•
AOP2 – Analogue dual stereo audio output
•
RS4 – Re-sampler for asynchronous input and output signals (mode 3 only)
The card edge control interface uses a condensed code to refer to source and destination
functions when routing audio through the module. The codes refer in practice to installed
option cards and basic functions such as embedder or de-embedder. These codes are
introduced here to make understanding board edge control easier.
Code
Function in mode 1 and other modes
A
de-embedder SDI 1
B
de-embedder SDI 2 (SDI 1 in modes 2 &3)
C
embedder SDI 1 (SDI 2 in mode 3)
D
embedder SDI 2 (SDI 1 in mode 2)
G
input option SDI 1 (SDI 1 in mode 2, not used in mode 3, SDI 1&2 in mode 4)
H
input option SDI 2 (SDI 1 in mode 2, not used in modes 3&4)
I
output option SDI 1 (SDI 1 in mode 2 not used in modes 3&4)
J
output option SDI 2 (SDI 1 in mode 2, not used in mode 3, SDI 1&2 in mode 4)
The allocation of a particular option card or circuit function to a side is not true of every
mode, since some modes may share functions or place them in series. Functional circuit
diagrams accompany discussion of each mode to make the meaning clear in each case.
Codes ‘E’ and ‘F’ are not used on a TANDEM-200.