Measurement-computing USB-1616FS Manuale Utente Scaricare il pdf (Pagina 24)

USB-1616FS User's Guide Specifications

Throughput benchmarks

Table 3. Throughput specifications

Throughput

(kS/s)

System

240

2.4 GHz P4 running Win XP, Service Pack 2, using an integrated USB Enhanced Host Controller

(EHC) port

240

2.4 GHz P4, Phoenix BIOS, Win XP, Service Pack 2, integrated USB EHC port

130

2 GHz, Xeon, Win XP, Service Pack 2, hyperthreading turned OFF, using an integrated USB EHC port

220

2 GHz, Xeon, Win XP, Service Pack 2, hyperthreading turned ON, using an integrated USB EHC port

260

2.4 GHz, P4 running Win XP, Service Pack 1, using Belkin PCI-bus USB 2.0 card

250

2.4 GHz, P4 running Win XP, Service Pack 1, using StarTec PCI-bus USB 2.0 card

Usage note

The typical limiting factor on throughput is CPU usage. At maximum system throughput, virtually all available

CPU power will be consumed by the USB data transfer. This is an important note since running your system

close to its maximum throughput will certainly limit the amount of CPU power available for running other

concurrent processes (for example, plotting or real-time analysis).

Table 4. Calibrated absolute accuracy specifications

Range

Accuracy (mV)

±10 V

±5.66

±5 V

±2.98

±2 V

±1.31

±1 V

±0.68

Table 5. Accuracy components specifications – all values are (±)

Range

% of Reading

Gain Error at FS (mV)

Offset (mV)

±10 V

0.04

4.00

1.66

±5 V

0.04

2.00

0.98

±2 V

0.04

0.80

0.51

±1 V

0.04

0.40

0.28

Table 6. Noise performance specifications

Range

Typical Counts

LSBrms

±10 V

1.52

±5 V

1.52

±2 V

1.67

±1 V

2.12

Noise distribution is determined by gathering 50 k samples with analog inputs tied to ground (AGND) at the

user connector. Samples are gathered at the maximum specified sampling rate of 50 kS/s.

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