National Instruments NI 5620 用户手册
Appendix A
Specifications
A-4
ni.com
Triggering
Modes .....................................................Immediate, software, digital
Sources....................................................PFI 1, RTSI<0..7>, PXI star
Export .....................................................RTSI<0..7>, PFI 1
Slope .......................................................Rising, falling
Pretrigger depth ......................................Up to 16 MS
Posttrigger depth.....................................Up to 16 MS
Minimum pulse width.............................100 ns
PFI 1 Input/Output
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
Input amplitude.......................................–5 to +15 dBm
Max nonoperating input level.................+16 dBm
Max DC input voltage ............................±10 VDC
Frequency ...............................................10 MHz
Required frequency accuracy .................±40 ppm