Operator`s manual

18 • Interface Description
Digidata 1322A Operator’s Manual, Copyright 2000-2001, Axon Instruments, Inc.
Trigger Output
This will support specific trigger output functions in pCLAMP 9.
Line Frequency Output
Line voltage frequency output is available from this BNC. This CMOS logic-level
output provides a 50-60 Hz digital signal (square pulse) that represents the
frequency from the AC mains power. This signal can be used to trigger external
devices at the line frequency. If you wish to trigger the Digidata synchronously
with the line frequency, it is preferable to use the internal line frequency trigger
which can be selected as one of the trigger sources in the Clampex or AxoScope
software.
Digital Outputs (0-15)
This is a 25-pin female-type connector with the following pin assignments:
pin
Digital Output
1 15
2 13
3 11
4 9
5 Line trigger
6 Analog ground
7 Analog ground
8 7
9 5
10 3
11 1
12 Analog ground
pin
Digital Output
13 Analog ground
14 14
15 12
16 10
17 8
18 Analog ground
19 Analog ground
20 Analog ground
21 6
22 4
23 2
24 0
25 Analog ground