ADInstruments PowerLab/4SP Owner's Manual page 36

Figure A–1
Block diagram of the
PowerLab/4
SP
SCSI Port
Controller
FIFO
Analog Output
28
The PowerLab can use SCSI or USB, whether built-in or via a card, to
communicate with the computer. SCSI (small computer system
interface) provides data transfer rates of up to 4 MB per second on
fast computers. The lower-speed USB (universal serial bus) provides
data transfer rates of up to 500 kB per second.
The PowerLab has four (PowerLab/4
(PowerLab/16
outputs of their input amplifiers are multiplexed to a 16-bit ADC
2
I C Port
2
I C
Controller
SCSI
MC68340
CPU
LATCH
LATCH
SAMPLING
CONTROL
LOGIC
External Trigger
) analog inputs, used to record external signals. The
SP
USB Port
Digital Output
USB
Controller
ROM
RAM
FIFO
16 BIT ADC
Pod
Control
), eight (PowerLab/8
SP
Digital Input
50/60 Hz
Mains Sync
FIFO
LATCH
Multiplexer
Analog Input
PowerLab Owner's Guide
), or 16
SP
POWER
SUPPLY