ELC-01MX User Manual
version 2.6
page 13
(8) MODE SELECT (TTL) connector
BNC connector for remote control of the MODE of operation. The TTL signal connected here
selects the mode of operation remotely (HI = VC, LO = CC); functional in EXT mode only.
(9) GATE connector / ON switch
BNC connector for generating a stimulus with a TTL signal in CC, VC or VCx10 mode. A
current or a voltage stimulus respectively is applied to the electrode as long as the TTL signal
connected here is HI, and the ON switch is set to the upper position (ON). The amplitude of
the stimulus is set by the HOLD. CUR. (nA) potentiometer (#4) in CC mode or the HOLD.
POT. (mV) potentiometer (#18) in VC mode. The polarity of the stimulus is set by the HOLD.
CUR. (nA) polarity switch (#5).
Setting the ON switch to the lower position disables the GATED stimulus, and enables the
setting of a holding current in CC or BRIDGE mode or a holding potential in VC or VCx10
mode.
(10) CURRENT OUTPUT connector / LP FILTER ON switch
BNC connector providing the current flowing through the electrode in nA / V. The scaling is
dependent on the setting of the CUR. OUTP. SENSITIVITY switch (#3).
Setting the LP FILTER ON switch to the upper position (ON) enables the built-in low-pass
filter (corner frequency: 3 kHz, attenuation: -18 dB/octave), i.e. the CURRENT OUTPUT
connector provides the filtered current with the scaling set by switch #3. In the lower position,
the built-in low-pass filter is disabled, i.e. the CURRENT OUTPUT connector provides the
unfiltered current with the scaling set by switch #3.
(11) POTENTIAL OUTPUT connector / LP FILTER ON switch
BNC connector providing the potential at the electrode in mV. The scaling is dependent on
the setting of the POT. OUTP. SENSITIVITY switch (#21).
Setting the LP FILTER ON switch to the upper position (ON) enables the built-in low-pass
filter (corner frequency: 3 kHz, attenuation: -18 dB/octave), i.e. the POTENTIAL OUTPUT
connector provides the filtered potential with the scaling set by switch #21. In the lower
position, the built-in low-pass filter is disabled, i.e. the POTENTIAL OUTPUT connector
provides the unfiltered current with the scaling set by switch #21.
(12) BUZZ push button
Push button to activate the BUZZ circuit. In order to facilitate the penetration of the cell
membrane or to clean the tip of the electrode a BUZZ circuit is provided which is based on
oscillations caused by overcompensating the capacitance compensation system. The
overcompensation of capacitance compensation yields very powerful high-frequency
oscillations. The BUZZ circuit is active as long as the button is pressed.
(13) POTENTIAL OUTPUT x1 connector
BNC connector providing the potential at the electrode in V. The scaling is fixed to x1 and
therefore independent on the setting of the POT. OUTP. SENSITIVITY switch (#20). This
connector is normally used to monitor voltage pulses in the VCx10 mode (see also #23), or
else to provide a DC signal if the high-pass filter (#19, Figure 5) is used.
