Using The Eclipse Trigger - Interacoustics Eclipse Additional Information

Eclipse Additional Information
3.15.2

Using the Eclipse Trigger

To describe the Eclipse trigger an example of the Eclipse connected to a cochlear implant stimulator is used.
The cochlear implant stimulator is provided by the manufacturer of the cochlear implant.
Left: The trigger socket on the back of the Eclipse. Center and left: The PPS box from Cochlear Nucleus and
it setting.
The trigger signal to synchronize the EP25 and the Cochlear Implant Stimulator may work in one of two
ways:
1. A signal is sent from the EP25 software on the Eclipse to the Cochlear Implant Stimulator
2. A signal is sent from the Cochlear Implant Stimulator to the Eclipse hardware.
Sending the trigger (synchronization) signal from EPx5 software:
Under the EPx5 General Setup you must select the type of trigger signal your Cochlear Implant Stimulator
device needs (Source or Sink):
The trigger signal is a 5 Volt square wave standard trigger signal
which is either positive (Source) or negative (Sink). The duration of
the trigger signal can be set to meet the needs of the Cochlear Im-
plant Stimulator device. You may find such specifications by refer-
ring to the technical specifications supplied by the manufacturer of
the device, or simply by trial and error.
The onset of the trigger signal starts at 0ms on the recording scale, however the duration of the trigger signal
can be changed to work in accordance with manufacturer specifications.
Cochlear Implant Stimulator sending the trigger signal:
Under the EPx5 Auto Protocols tab, the eABR protocol setting for Stimuli per
sec, must be set to Ext. Trigger (move the slider to the far right) in order to ena-
ble the "External Trigger". This allows the EPx5 to record a measurement every
time a 5 Volt Source signal (duration >10ms) is sent from the Cochlear Implant
Stimulator. The stimulus rate from the Cochlear Implant Stimulator or other ex-
ternal device, must not exceed 50 per second in order to allow sufficient record-
ing and processing time.
Ensure that the trigger signal is actually being sent from the Cochlear Implant
Stimulator to the EPx5 software. It may need to be manually enabled in the
software provided by the manufacturer of the CI or ABI.
Page 74