Digidata 1550 Low-Noise Data Acquisition System User Guide
30
5023399 A
Digital Inputs
Digital Outputs
A DB 25-pin female connector is provided with pin assignments as listed
in
.
Output short circuit to signal ground
±25 mA
Table A-2:
Analog Outputs (cont’d)
Output Name
Description
Table A-3:
Digital Inputs
Input Name
Description
Input type
5V nominal, >4V high threshold
START trigger
rising-edge sensitive
TAG trigger
rising-edge sensitive
Table A-4:
Digital Outputs
Output Name
Description
Number of bits
16 (8 supported in software)
Output driver
advanced CMOS
(AC) compatible output current
±4 mA
SCOPE trigger
shared bit
Table A-5:
Pin Assignments
Pin number
Digital Output
1
0
2
2
3
4
4
6
5
N/C
6
Analog ground
