Measurement-computing USB-2020 Manuel d'utilisateur télécharger pdf (Page 6)

Chapter 1

Introducing the USB-2020

The USB-2020 is a high-speed data acquisition USB board supported under the Windows

operating system.

The USB-2020 is compatible with both USB 1.1 and USB 2.0 ports. The speed of the device may be limited

when using a USB 1.1 port due to the difference in transfer rates on the USB 1.1 versions of the protocol (low-

speed and full-speed).

The USB-2020 device provides the following features:

 two 20 MS/s analog inputs

o simultaneous sampling

o 1 A/D per channel

o 12-bit resolution

o ±10 V, ±5 V, ±2 V, ±1 V voltage ranges (software-selectable)

o 17 MHz input bandwidth

 64 megasample onboard memory

o 40 MS/s overall rate to onboard memory when acquiring from both channels (20 MS/s per channel)

o 8 MS/s throughput to host computer

 Analog and digital triggering (level and edge )

 Analog and digital gating

 Eight digital I/O lines

 Internal or external pacing of analog scans

 Eight digital I/O lines

 BNC connectors and 40-pin auxiliary connector for signal connections

Functional block diagram

USB-2020 functions are illustrated in the block diagram shown here.

Figure 1. Functional block diagram

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Measurement-computing USB-2020 Manuel d'utilisateur Page 6