TDT RZ2, Manual, Page: 324 / 736

7-10 System 3
IZ2/IZ2H Stimulator
male banana to alligator clip cable. These cables also include ferrite beads to
remove any potential RF noise that might travel through the cable. For best results
position the ferrite bead close to the source of the RF noise.
An IZ2 Battery Interconnect cable with a ferrite bead is also included for use when
using the external ground. For best results position the ferrite bead close to the LZ.
Software Control
Synapse
Operation of the stimulator system is controlled by an IZ2 object in the Synapse Rig
and Processing Tree. Consult the Synapse Manual for more detailed information on
general Synapse use.
Ensure that hardware your rig is properly set up in the Rig Editor (Menu > Edit
Rig) and you have the required elements: RZ processor, DSPI (or DSPQ with
optics) and IZ2 stimulator. Make sure the IZ2 object has the correct model selected
(IZ2, IZ2H, IZ2M, IZ2MH) and channel count.
A typical electrical stimulation experiment includes an Electrical Stimulation gizmo to
generate monophasic or biphasic pulses, then a Signal Injector gizmo which routes
this single channel signal to one or more channels in a multi-channel stream and
determines what the non-stim channels are doing (typically set to “IZ2 Open”
mode), and then this multi-channel stream connects to the IZ2 object to control all
channels on the IZ2 at once.
Important Experiment Design Considerations
Sampling Rate
The IZ2 can control 128 channels at up to 50 kHz, 64 channels at up to 100 kHz,
and 32 channels at a maximum 200 kHz. The IZ2/IZ2H sampling rate is the same
as the sampling rate of the RZ device, so the maximum sampling rate of the IZ2/
IZ2H is also limited to the maximum sampling rate of the type of RZ device
controlling it.
Note: When sampling at 200 kHz, the channel stim lights and output monitoring are not
available, and stimulation is limited to the first five channels of each bank of
channels.