EXT-02F User Manual
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version 4.2
page 8
(16)
-IN, +IN connectors
BNC connectors for connecting the INPUT signal if no headstage is used, input
resistance 1 M
Ω
. The inputs can be used in single ended or differential
configuration. In differential configuration the signal which is connected to–IN is
subtracted from the signal that is connected to +IN. Usually the reference
electrode is connected to the –IN connector. If only one INPUT is used (single
ended configuration) the other INPUT must be grounded using switch #14 (see
also #14 and chapter (3)).
Very Important: You must not use inputs at the front panel and a headstage for one channel
simultaneously!! If the BNC connectors are used the headstage must be disconnected.
Also very Important: Setting both switches to OFF means that both inputs are grounded, i.e.
measurement is impossible!! This applies also if a headstage is used since these switches will
also ground the headstage inputs REF and P
EL
if set to OFF!!
2.4.
Description of the Rear Panel
Figure 2: EXT-02F rear panel view
Since the rear panel elements for the two channel EXT-02F are identical for each channel A
and B (with identical functions and labels) these elements are numbered and described only
once (for channel A).
(1)
POWER ON switch
Switch for turning the EXT amplifier ON (upper position) or OFF (lower position).
(2)
POWER SUPPLY connector
Connector for an external power supply (12V to 18V, AC, min. 1A).
Important: If you encounter noise when operating the EXT-02F try to place the amplifier as
far away as possible from the power supply!! This will avoid magnetic coupling of the power
supply to the amplifier!
