Agilent Technologies U2802A Manuale Utente Scaricare il pdf (Pagina 18)

U2300A

High density multifunction USB DAQ (continued)

General purpose digital counter

Maximum count (2³¹ – 1) bits

Number of channels Two independent up/down counter

Compatibility TTL

Clock source Internal or external

Base clock available 48 MHz

Maximum clock source frequency 12 MHz

Input frequency range

[4]

0.1 Hz to 6 MHz at 50% duty cycle

Pulse width measurement range 0.167 μs to 178.956 s

Analog trigger

Trigger source All analog input channels, External analog trigger (EXTA_TRIG)

Trigger level ±Full scale for internal; ±10 V for external

Trigger conditions Above high, below low, and window (software selectable)

Trigger level resolution 8 bits

Bandwidth 400 kHz

Input impedance for EXTA_TRIG 20 kΩ

Coupling DC

Overvoltage protection Continuous for ±35 V

maximum

Digital trigger

Compatibility TTL/CMOS

Response Rising or falling edge

Pulse width 20 ns minimum

Calibration

[5]

On board reference 5 V

Temperature drift ±2 ppm/°C

Stability ±6 ppm/1000 hrs

General

Remote interface Hi-Speed USB 2.0

Device class USBTMC-USB488

Programmable interface Standard Commands for Programmable Instruments (SCPI) and IVI-COM

[1]

When multiple channels are used in the U2355A or U2356A, the sampling rate of each channel is the maximum sampling rate divided by the number

of channels used. For multiple channels used in the U2331A, the sampling rate of each channel = (1 MSa/s) / number of channels used.

[2]

System Synchronous Interface (SSI) and Star trigger commands are used when modular devices are used in the product chassis.

[3]

Maximum external reference voltage for analog output channels (AO_EXT_REF) is ±10 V.

[4]

Measurement frequency’s resolution:

= 12 MHz/n, n = 2, 3, 4, 5, ..., 120 M

= 6 MHz, 4 MHz, 3 MHz, 2.4 MHz, 2.0 MHz, ..., 0.1 Hz (up to six decimal points)

[5]

20 minutes warm-up time is recommended.

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Agilent Technologies U2802A Manuale Utente Pagina 18

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