User`s guide

10 • Introduction

• Synchronous Digital Inputs (SDI): For DAQ/PXI-2204 only

• Number of channels: 4 digital inputs sampled simultaneously with the

analog signal input.

• Compatibility: TTL/CMOS

• Input voltage:

P Logic Low: VIL=0.8 V max.; IIL=0.2mA max.

P High: VIH=2.0V max.; IIH=0.02mA max

♦ General Purpose Timer/Counter (GPTC)

• Number of channels: 2 independent Up/Down Timer/Counters

• Resolution: 16 bits

• Compatibility: TTL

• Clock source: Internal or external

• Max source frequency: 10MHz

♦ Analog Trigger (A.Trig)

• Source: All analog input channels; external analog trigger

(EXTATRIG)

• Level: ±Full-scale, internal; ±10V external

• Resolution: 8 bits

• Slope: Positive or negative (software selectable)

• Hysteresis: Programmable

• Bandwidth: 400khz

• External Analog Trigger Input (EXTATRIG):

P Input impedance: 40KO for DAQ/PXI-2204

20KO for DAQ/PXI-2205/2206

• Coupling: DC

• Protection: Continuous ± 35V maximum