natus Nicolet EEGwireless32, User Manual, Page: 85 / 138

April 27, 2015
6-3
Wireless Operation
Wireless operation
The maximum wireless sampling rate is 4096Hz. If you select a sampling rate above
this, the Acquisition software will warn you that you need to turn off wireless in order
to sample at a higher rate. If you accept this change, you must power cycle the
amplifier in order to regain wireless connectivity.
Do not use the photic functionality of the wireless amplifier while transmitting
wirelessly. If you want to perform photic stimulation, connect the ethernet cable to the
Acquisition station or the network.
There is a 10 minute disconnected threshold that determines if a file split needs to be
done in order to retrieve data from the amplifier. If the amplifier becomes
disconnected from the Acquisition station and then is reconnected to the Acquisition
station and if the time the amplifier is disconnected plus the time it takes for
NicoletOne to download the data stored on the amplifier is greater than 10 minutes, a
file split will occur and a file catchup window will appear. Note that this 10 minute
threshold is not user configurable.
If the Acquisition station on which NicoletOne is running has a power outage,
NicoletOne will attempt to restart acquisition when power is restored to the
workstation. If the amplifier that you are using is out of range when NicoletOne
restarts, it will not restart acquisition on that amplifier. To restart acquisition:
1. Bring the amplifier back into range or tether the amplifier to the workstation.
2. Select the amplifier from the Amp Selection screen.
3. Restart acquisition.
If you check impedance while recording and out of range, upon coming back into
range, the study will display an overflow error and the recording may stop. To resume
recording, press the Record button in acquisition. Note that this does not happen
when file catchup is initiated after coming back in range.
If your wireless amplifier becomes disconnected for extended periods of time, you
may end up with a number of exam files in NicVue or Study Room. When this occurs,
you will not end up with a single continuous exam file representing the entire study.
Each exam segment marked as “DOWNLOADED” is a complete segment of the
exam. These “DOWNLOADED” files along with the most recently marked exam file
(which may be a downloaded file if the exam was stopped while the amplifier was
disconnected) comprise the entirety of the exam.