National Instruments NI PXI-5621 specifications - page 7

© 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