VTI Instruments EX1000A, User Manual

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EX10xxA Triggering 65
channel is linked as a DIO Limit Event, this is noted in the direct control mechanism as a pseudo-
warning to guard against accidental use.
The default selections for each DIO channel are:

output enable is off

output level is 0
The default selections for DIO Limit Events are:

all channels are disabled

invert is off

latch is off
The electrical specifications for the digital I/O port are provided in Table 3-8. Particular note should
be given to the
V
INPUT
specification of -0.5 V to 5.5 V. Exceeding that value with an external voltage
source, even though a resistance, could permanently damage the EX10xxA.
Characteristic Value
V
INPUT
-0.5 V to 5.5 V
V
IH
2 V min
V
IL
0.8 V max
V
OH
( I
OH
= -32 mA) 2 V min
V
OL
( I
OL
= 64 mA) 0.55 V max
T
ABLE
3-8: D
IGITAL
I/O P
ORT
E
LECTRICAL
S
PECIFICATIONS
LXI T
RIGGER
B
US
The EX10xxA series provides an LXI compatible trigger bus connector set on the rear panel of the
instrument. Both connectors have the same pin assignments and are wired in parallel. For more
information on the LXI Trigger Bus and creating an appropriate cable, please visit
www.lxistandard.org and refer to LXI Standard Revision 1.2 and LXI Trigger Bus Cable and
Terminator Specifications Rev 1.1 .
Pin Function Pin Function
1 +3.3 V 14 RP_TRIG_P0
2
GND
15
RP_TRIG_N0
3 RP_TRIG_P1 16 RESERVED
4 RP_TRIG_N1 17 RP_TRIG_P2
5 GND 18 RP_TRIG_N2
6
RP_TRIG_P3
19
GND
7 RP_TRIG_N3 20 RP_TRIG_P4
8 GND 21 RP_TRIG_N4
9
RP_TRIG_P5
22
GND
10 RP_TRIG_N5 23 RP_TRIG_P6
11 RESERVED 24 RP_TRIG_N6
12 RP_TRIG_P7 25 RESERVED
13
RP_TRIG_N7
1 2 3 4 5 6 7 8 9 10 11 12 13
14 15 16 17 18 19 20 21 22 23 24 25
T
ABLE
3-9: T
RIGGER
B
US
C
ONNECTOR
P
IN
A
SSIGNMENT