EXT-02F User Manual
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version 4.2
page 7
(12)
GAIN switch
10-position switch for selecting the GAIN of the output signal at the OUTPUT
connector (#12). Amplification factors: x10, x20, x50, x100, x200, x500, x1k,
x2k, x5k, x10k.
(13)
OUTPUT connector
BNC connector providing the recorded and conditioned signal.
(14)
ZERO ADJ. trimpot
Trimpot for compensating for amplifier offsets. If the baseline is not zero even
if the input is grounded (INPUT switches #14 set to OFF), this offset can be
compensated for.
Compensation procedure:
❏
Set the input switches (#14) to OFF to ground the inputs, and set the HIGH PASS FILTER
to 400 Hz.
❏
Set the GAIN range switch to 1k and adjust the baseline to zero using the trimpot.
❏
Set the GAIN range switch to 10k and adjust the baseline again if necessary.
(14)
INPUT switches
Switches for grounding the INPUT connectors (#16) or the headstage connector
(#15). One switch for the + IN and one for the –IN
Important: In differential measurements both switches for + IN and – IN have to be
set to ON. In single-ended measurements the switch for the INPUT that is not used
must be set to OFF!! (see also chapter (3)).
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!!
(15)
HEADSTAGE connector
Connector for the optional headstage (see also chapter (3)).
