VA-10X User Manual
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version 7.0
page 7
(1)
HEADSTAGE connector
The HEADSTAGE is connected via a flexible cable and an 8-pole connector to the
mainframe.
Important
: Always turn power off when connecting or disconnecting the headstage.
(2)
GAIN switch
The GAIN of the output signals is controlled by a 7-position rotary switch that
selects gains of 0.5, 1, 2.5, 5, 10, 25 and 50 mV/pA.
OUTPUT unit
The OUTPUT unit consists of
(3)
-
OVER + OVER LED, (
14
) OUTPUT
FILTERED connector and (
15
) OUTPUT UNFILTERED connector
(3)
-
OVER + OVER LED
The VA-10X has an over voltage indicator with two LEDs, which light up if the
amplifier is near it’s positive or negative limit (±10 V).
(14)
OUTPUT FILTERED connector
The OUTPUT FILTERED BNC connector provides a voltage that is proportional to the
current passed through the electrode (mV/pA with GAIN 1). This voltage is FILTERED
by a Bessel filter (see #
4
) and scaled by the GAIN factor (see #
2
).
(15)
OUTPUT UNFILTERED connector
The OUTPUT UNFILTERED BNC connector provides a voltage that is proportional to
the current passed through the electrode (mV/pA with GAIN 1, see also #
3
). This
voltage is scaled by the GAIN factor (see #
3
) and not filtered.
(4)
LP FILTER switch
16-position switch to select corner frequencies of the Bessel low pass filter.
Corner frequencies: 20, 50, 100, 200, 300, 500, 700, 1k, 1.3k, 2k, 3k, 5k, 8k,
10k, 13k, 20k Hz.
