External Triggering - MBT SMARTING 24 User Manual

10. External triggering

External triggers can be sent wirelessly, both to PC and Android platforms.
For precise external triggering, the recommended method is the usage of the
LSL protocol (already described in Chapters 6 and 8), through Neurobs®
Presentation software (or others, but it is highly recommended to check
timing precision beforehand). Another possibility is to use the UDP protocol.
One solution is to utilize the OpenSesame software. However, when using
the OpenSesame, both the Opensesame and SMARTING device should be
connected to the same PC or smartphone. Alternatively, when using LSL
protocol (with Presentation or other software or peripheries) triggers can be
sent over the LAN and still keep the minimal delay and jitter, usually in the
range of sampling rate (e.g. 2 or 4ms).
10.1 Procedure for sending triggers from Neurobs® Presentation
Presentation is renowned stimulus delivery and experiment control program
for neuroscience research (https://www.neurobs.com/presentation).
Presentation supports the LSL protocol, which means that the triggers can be
sent both if running on the same machine as the SMARTING, or a separate
device, as long as they are both connected via LAN/WLAN networks. Please
note that for sending triggers over LAN/WLAN, user needs to use Smarting
Streamer PC utility. If using Android for signal acquisition/experimentation,
the Presentation software must be on the same device as the SMARTING
Android application.
In order to enable the LSL triggering protocol in Presentation software,
navigate to the settings tab and choose the tab general (as depicted in Figure
10.1).
Under the tab general thick the Lab Streaming Layer (Figure 10.1). In order to
define the stream name and string marker contents, click on the properties
tab, next to the Lab Streaming Layer checkbox and the LSL data port window
will pop-up (Figure 10.2).
60 SMARTING User Manual – Release 11/03/2019