Multichannel Systems STG4004+STG4008 Manual - Manual (Page 66)

Stimulus Generator 4000 Series Manual
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Select “Single Trigger” if you want to start the stimulus protocol once via external trigger.
Set up your stimuli with the MC_Stimulus II program. Download the stimulus protocol from a
MC_Stimulus II file to the STG. Arm the STG either manually by pressing the Start / Stop button
on the front panel, or with software controls. To arm the STG via software, use the start icon
in MC_Stimulus II main menu, or click the combined LED / Start / Stop button
for the “Sweeps”. When armed, the STG accepts one single trigger on its trigger input The trigger
input must be connected to the device which generates the trigger. To start the stimulus protocol
a second time, the STG needs to be armed again manually. As long as the STG is armed, the LED
in MC_Stimulus II appears blue to indicate the armed state.
The stimulation will automatically be started after applying the single trigger from the external
device. The LED in will turn to red while the trigger is running and return to grey after the trigger
has finished the stimulus protocol The STG needs to be armed again to accept the next trigger.
It is possible to stop the stimulation at any time while the STG is armed or is running via Start /
Stop button on the front panel of the STG or via software.
Sweep Count
The number of sweeps are counted and displayed for each of the triggers at the bottom
of the main window.
Please note that not the number of stimuli but the number of sweeps is counted, whereby one
sweep is defined as one complete run of the programmed stimulation pattern, as displayed in the
main window. So, if five stimuli are programmed, and the repeat rate in the Trigger Setting menu
is set to six, 30 stimuli will be delivered but the sweep count will be six.
Sweeps are not counted online, the final number is displayed after the STG has been stopped.
The number of sweeps per channel is not put to zero automatically every time the stimulation
is started. Instead, a reset only happens if a trigger is again used in the new stimulation. So, if
a stimulation file uses trigger one and two with a repeat of three each, the display will show
1:3 2:3 3:0 4:0 at the end of the stimulation. If afterwards for example a stimulation file is
started which uses only trigger four in continuous mode, and this file is stopped after 15 repeats
of the programmed stimulation pattern, the display will show 1:3 2:3 3:0 4:15.