EXT-02F User Manual
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version 4.2
page 6
(7)
OFFSET potentiometer
Potentiometer for OFFSET compensation for the measured potential in DC mode.
The RANGE is set by switch #5. The analog BALANCE monitor (#1) displays
the OFFSET in the range of
±
30 mV, and can be used for optimal cancellation of
the OFFSET.
Note: The middle position corresponds to 0 V OFFSET since negative as well as positive
OFFSETS can be cancelled.
Audio Monitor
(8)
THRESHOLD % potentiometer
Potentiometer for setting the THRESHOLD in % of the value set by
INPUT MODE switch #8 (0.5 V, 1 V, 2 V). For example, if the INPUT
MODE switch #8 is set to 2 V and the THRESHOLD potentiometer is
set to 50%, the resulting THRESHOLD for monitoring the OUTPUT
signal will be at 1 V, i.e. only signals greater than 1 V will be converted
into a sound (NOISE). With an amplification of 10000 this correspondents to a signal
of 100 µV at the electrode.
(9)
INPUT MODE switch
Switch for selecting the INPUT MODE.
PITCH:
The voltage of the INPUT signal is converted into a tone with a
frequency equivalent to the amplitude of the INPUT voltage.
OFF:
The audio monitor is switched OFF
NOISE:
The voltage of the INPUT signal is high pass filtered,
amplified and transduced to a sound.
2 V, 1 V, 0.5 V:
The audio monitor works in NOISE MODE with
THRESHOLD function. 100% THRESHOLD is set to the
selected value (2 V, 1 V or 0.5 V) (see also #7).
(10)
PHONES connector
Stereo jack connector for PHONES or an external amplifier (e.g. active
speakers).
(11)
VOLUME potentiometer
Potentiometer for setting the VOLUME of the internal speaker or PHONES
linked to connector #9. Turning clockwise will turn up the sound.
For EXT-02F/2 two channel amplifier only
SOURCE switch
Switch for selecting the channel to be monitored (channel A or channel B)
