Figure 3.2:
Light Source Channel Configuration Window
1. The
Channel Types
(Fig.
) are displayed on the left side of the window. These include
Laser
light sources,
Ce:YAG
light sources and
LED
light sources, as well as the
Scope
to measure signal using the driver.
2. The
Channel Options
box (Fig.
) includes
Light Source Options
and
Trigger Options
for the given channel.
a) The
Channel
(Fig.
) drop-down list identifies which driver channel is currently being edited, assuming a
driver with multiple channels.
b) The
Mode
(Fig.
) drop-down list includes each possible driver mode. These are used to control the pulse
sequences emitted by the light source. The options related to this mode are detailed with the
Sequence
Options
.
c) The
Current Options
(Fig.
) includes the slider used to control the current sent to the light source.
• When using a
LED Driver
module, the
Overdrive
checkbox will appear. When selected, this allows the
system to exceed the normal safe current limit of the light source.
THIS SHOULD ONLY BE USED WITH
PULSED SIGNALS, AS IT CAN OTHERWISE DAMAGE THE LIGHT SOURCE.
• When using a
LEDD
, the
Low-Power
checkbox will appear. When selected, this allows reduced-power
signaling for the same voltage. This mode is only available for
CLED
modules. This allows low-power
signals to be more stable in time. The maximal current is reduced to one tenth of light source’s normal
maximal current. If the
BNC Output
is used, the voltage of the signal is proportional to the current pass-
ing through the light source, and not the voltage sent to it. For example, a driver with a normal maximum
current of 2000 mA for a 5 V signal (400 mA/V) will have a maximum current of 200 mA for a 5 V signal
(40 mA/V). The
BNC output
of the driver will still relate LED current with a 400 mA/V conversion factor.
d) The
Trigger Options
(Fig.
) allow the selection of a number of trigger modes to activate a pulse sequence.
• The
Manual
trigger mode is standard, and allows direction activation by the user.
• The
Triggered
trigger mode is active when an input greater than 4 V is detected on the BNC input. Fol-
lowing input pulses will be ignored while the sequence is running. The sequence will restart with the
arrival of the first input pulse after the sequence has finished.
Chapter 3. Doric Neuroscience Studio
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