National Instruments 6023E 用户手册
Appendix A
Specifications for PCMCIA Bus
© National Instruments Corporation
A-17
Base clocks available
Counter/timers ................................ 20 MHz, 100 kHz
Frequency scalers............................ 10 MHz, 100 kHz
Base clock accuracy ............................... ±0.01%
Max source frequency ............................ 20 MHz
Min source pulse duration...................... 10 ns in edge-detect mode
Min gate pulse duration.......................... 10 ns in edge-detect mode
Data transfers ......................................... Interrupts, programmed I/O
Triggers
Digital Trigger
Compatibility ......................................... TTL
Response ................................................ Rising or falling edge
Pulse width ............................................. 10 ns min
Calibration
Recommended warm-up time ................ 30 min
Interval ................................................... 1 year
External calibration reference ................ > 6 and < 10 V
Onboard calibration reference
Level ............................................... 5.000 V (±3.5 mV) (actual
value stored in EEPROM)
Temperature coefficient .................. ±5 ppm/°C max
Long-term stability ......................... ±15 ppm/
Power Requirement
+5 VDC (±5%)....................................... 270 mA
Note
Excludes power consumed through V
cc
available at the I/O connector.
Power available at I/O connector ........... +4.65 to +5.25 VDC at 0.75 A
1 000 h
,