System 3
3-43
RX7 Stimulator Base Station
Note:
Specifications for the stimulus isolator D/As and the preamplifiers A/D are found
under the technical specifications for those devices.
* Note:
When used with the microstimulator, the sampling rate is limited to 24.414
kHz by the Stimulator Fiber Optic Port.
DSP
100 MHz Sharc ADSP 21161, 600 MFLOPS Peak
Two or Five
Memory
128 MB SDRAM (Shared)
D/A
4 channels, 16-bit PCM
Sample Rate
Up to 97.65625 kHz (8X upsampled to 200 kHz default
operation)*
Frequency Response
DC-Nyquist(~1/2 sample rate)
Voltage Out
+/- 10.0 Volts
Voltage Out Accuracy
+/- 10%
S/N (typical)
84 dB (20 Hz to 25 KHz)
82 dB with upsampling disabled
THD (typical)
-77 dB for 1 kHz output at 5 Vrms
-74 dB with upsampling disabled
Output Impedance
10 Ohm
Fiber Optic Ports
One or Two Inputs, Output for Stimulator *
Digital I/O
40 bits programmable (8 bits bit-addressable and a 32 bit
word, addressable as 4 bytes)
