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© National Instruments Corporation 7 NI PXI-5621 Specifications
Triggering
Modes.....................................................Immediate, software, digital
Sources................................................... PFI 1, PXI<0..7>, PXI STAR
Export.....................................................PFI 1, PXI<0..7>
Slope.......................................................Rising, falling
Pretrigger depth......................................Up to 32 MS
Posttrigger depth .................................... Up to 32 MS
Minimum pulse width ............................100 ns
External Trigger (PFI 1)
PFI 1 connector...................................... SMB male
Trigger level...........................................TTL
Max input voltage .................................. 5.5 V
External Frequency Reference Input
Connector (REF CLK IN)...................... SMA female
Impedance..............................................50 Ω nominal
Input amplitude ......................................–5 to +15 dBm
Max non-operating input level............... +20 dBm
Max DC input voltage............................ ±3.5 VDC
Frequency range..................................... 10 MHz ±40 ppm
Crosstalk from reference input............... <–85 dB
Calibration
Calibration interval ................................ 1 year