10-47
SH16 Switchable Headstages
SH16SwitchableHeadstages
SH16‐SwitchableAcuteHeadstage
The SH16/SH16-Z/SH16-IZ is a 16 channel acute headstage containing recording
circuitry that can be bypassed for selected channels and connected to the stimulus
isolator. It features high voltage, low leakage solid-state relays to allow for remote
switching.
Note: The SH16 provides unity gain (1x) for its recording channels.
The minimum switching time for the SH16/SH16-Z is dependent on the length of
time it takes to send the 24-bit serial control bit pattern (see “Creating the Serial
Control Bit Pattern” on page 10-49, for more information) that defines which
channels are switched plus an inherent 2 ms delay associated with the solid state
relay switches.
The minimum switching time can be calculated as follows:
[Number of bits in serial control pattern (24)] ÷ [Serial data transfer Rate (939
Hz Max)] + 2 ms
The diagram below illustrates how the relays are used to switch channels for
recording (to RA16PA) or stimulation (from MS16).
Serial Transfer Rate (Hz) Minimum SH16 Switching Time (ms)
939 28
469 53
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