4
MED64 Head Amplifier Components and Functions
The MED64 Head Amplifier (64-CHANNEL HEAD AMPLIFIER, MED-A64HE1) is the head amplifier for the MED64
system. Filed potentials (extracellular signals) are acquired from the acute or cultured biological preparations
placed onto the 64 planar microelectrodes in the MED probe. The acquired raw signals are amplified by x10 with
the MED64 Head Amplifier, then sent to the MED64 Main Amplifier (64-CHANNEL MAIN AMPLIFIER, MED-
A64MD1), where input signals are amplified further and digitized. Stimulus current can be delivered via any of
the 64 electrodes using the built-in stimulator in the MED64 Head Amplifier.
Components and their functions
Front panel
(1) POWER
Turns amplifier ON and OFF.
(2)STIMULUS CURRENT
Selection of x2 doubles the output stimulus current. Selecting NORMAL maintains the output stimulus current
amplitude equal to the value set in the software. (e.g. when 10
A is set in the software with x2 selected, the
output stimulus current amplitude is 20
A. When 10
A is set in the software with NORMAL selected, the
output stimulus current amplitude is 10
A)
Back panel
(1) INPUT
Signal input. Connects to the 68 pin terminal of the MED connector.
MED probe MED connector MED64 Head Amp. MED64 Main Amp. PC and Mobius software
Stimulator
Digitizer
(1)
(2)
(1)
(2)
(3) (4) (5) (6)
(7)
