Description of the Hardware
EPC9 Manual
15
EPC 9 Double and Triple
The EPC9 Double and Triple contain two and three independent EPC9-amplifiers in
one case, respectively. All amplifiers share a single ITC-16 AD/DA-board.
The ITC-16 board provides 4 DA-channels which are sufficient to allow
simultaneous stimulation of every individual amplifier. The 8 available AD-channels
can independently read all voltage- and current-outputs of the individual amplifiers.
One amplifier is always selected as the "active" amplifier. The "active" amplifier is the
one which is enabled to receive configuration commands. One can visually identify
the "active" amplifier by checking the DIGITAL BUS light. The green LED-light of
the "active" amplifier flickers when the digital lines are alive during command
transmission. The notion "active amplifier" does not imply that the other amplifiers
are not active. They remain fully functional, but not enabled to receive programming
commands.
Note 1: Mux-AD, Test-DA, and Clipping-lines are connected to the selected "active" EPC9
board only. Stim-DA, Vmon-AD, and Imon2-AD are always accessible for all
individual EPC9 boards.
Note 2: The Test-DA can be connected to the stimulus input of all 3 amplifiers. This allows
to simultaneously stimulate all 3 amplifiers. Separate scaling factors are available for
each individual amplifier.
The internal, hardwired DA- and AD-channel assignments for the EPC9 Double and
Triple are as follows:
EPC9 amplifier board
1
2
3
Stim-DA
0
1
2
Vmon-AD
0
2
4
Imon2-AD
1
3
5
Test-DA
1,2
3
3
3
Mux-AD
1
7
7
7
