BA-01X User Manual
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version 1.9
page 13
gated stimulus unit
The gated stimulus unit consists of (7) STEP SIZE digital
potentiometer, (27) + / 0 / - switch (STEP SIZE switch) and (28) GATE
(TTL) connector.
(7) STEP SIZE digital potentiometer
Digital potentiometer to set the amplitude of the gated stimulus.
Range: dependent on the setting of the CURRENT RANGE switch (9).
x1:
±
9.99 nA, resolution 10 pA; x10:
±
99.9 nA, resolution 100 pA.
(27) + / 0 / - switch (STEP SIZE switch)
+ / 0 / - toggle switch to disable the gated stimulus set by STEP SIZE (7) and gated by
GATE (TTL) STEP SIZE (28) or to select the polarity of the gated stimulus (+: gated
stimulus positive, 0: gated stimulus disabled, -: gated stimulus negative).
(28) GATE (TTL) STEP SIZE connector
With this input a current step (gated stimulus) can be generated set by the digital
potentiometer STEP SIZE (7) and the polarity switch (27). This current step is gated by a
positive digital pulse (3-5 V) applied to the BNC connector. Two examples are given in
Figure 4. The duration of the current step is determined by the duration of the gating
signal. The amplitude of the current step is set by STEP SIZE (7).
input voltage signal (>3 V)
output current signal
Figure 4: input-output relation using GATE (TTL) STEP SIZE
(29) CURRENT OUTPUT connector
BNC connector monitoring the stimulating current passed through the electrode.
(sensitivity: 0.1 V / nA, resistance: 50
Ω
).
