Molecular Devices MiniDigi Manuel utilisateur

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

MiniDigi 2-Channel Digitizer Setup Guide

2 5046262 A

MiniDigi Digitizer Installation

The optional accessory MiniDigi digitizer works with AxoScope Software only. Clampex Software does not

support the MiniDigi digitizer.

To configure the MiniDigi digitizer in AxoScope Software:

1. Run the pCLAMP 10.6 installer before you connect the MiniDigi digitizer to the computer.

2. After pCLAMP has been installed, connect the USB cable to the USB port on the computer and to the

MiniDigi digitizer.

3. In the Windows Found New Hardware Wizard, follow the instructions until Windows has installed the

digitizer.

4. Start AxoScope Software by clicking Start > All Programs > Molecular Devices > pCLAMP 10.6 >

AxoScope 10.6.

5. Open the Configure > Digitizer dialog and click Change.

6. In the Change Digitizer dialog, select MiniDigi from the Digitizer Type field.

7. Click Scan to detect the digitizer. Available is displayed, and OK is enabled.

8. Click OK to exit this dialog.

9. Click Configure to open the Configure MiniDigi dialog.

10. Select the style of filtering to use.

Analog filtering applies a low-pass, anti-aliasing filter with a cutoff frequency one fifth of the

sampling rate.

MinMax filtering takes the minimum and maximum samples in every n samples, where n is

determined by the sampling rate.

11. To calibrate the MiniDigi digitizer, attach a grounding plug to the Channel 0 BNC, and then click Start.

12. Repeat for Channel 1.

13. Click OK to exit this dialog.

The MiniDigi digitizer is now ready to do experiments.

For research use only. Not for use in diagnostic procedures.

The trademarks mentioned herein are the property of Molecular Devices, LLC or their respective owners. These trademarks may not

be used in any type of promotion or advertising without the prior written permission of Molecular Devices, LLC.

Patents: http://www.moleculardevices.com/productpatents

Product manufactured by Molecular Devices, LLC.

1311 Orleans Drive, Sunnyvale, California, United States of America 94089.

Molecular Devices, LLC is ISO 9001 registered.

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