MiniDigi 2-Channel Digitizer Setup Guide
MiniDigi Digitizer
The optional accessory MiniDigi 2-Channel Digitizer is a low-noise, two-channel digitizer, designed to function
with AxoScope Software as a simple digital chart recorder. It has two independent, 16-bit analog inputs, each
of which provides digitization at up to 1 kHz. The MiniDigi digitizer communicates with the host computer
through a USB interface that also provides power to the digitizer.
Filtering
The MiniDigi digitizer uses your choice of minmax or analog-like filtering. If you select minmax, both the
minimum and maximum values in each sample period are sent to the computer.
The analog-style filter is a low-pass, anti-aliasing filter with a cutoff frequency one fifth of the sampling rate.
Interface Description
The front panel of the MiniDigi digitizer has two BNC connectors for analog input channels 0 and 1. The back
panel contains a USB connector and an LED to indicate power-on status. The LED slowly blinks to indicate
communication with the software driver.
Specifications
Item
Specification
Number of input channels
2 single-ended
Resolution
16-bit (1 in 65536)
Acquisition rate (per channel)
1 kHz
Input range
–10.000 V to +10.000 V
Maximum allowable input range
–50 V to +50 V
Input resistance
1 M
Gain value
1
Anti-alias filter (per channel)
Three-pole, 1.5 kHz Bessel
Table 1-1: MiniDigi Specifications (analog input)
USB Interface
The MiniDigi digitizer has a low-power (< 100 mA), Universal Serial Bus (USB) 1 device to interface with the
computer. The software driver is compatible with Windows XP Pro and Windows 7 operating systems.
5046262 A
January 2016
