VTI Instruments Corp.
78
EX2500A Trigger Mechanisms
LXI
T
RIGGER
B
US
The EX2500A provides an LXI trigger bus connector. For more information on the LXI Trigger
Bus, please visit
www.lxistandard.org
and refer to
LXI Standard Revision 1.1
and
LXI Trigger Bus
Cable and Terminator Specifications Rev 1.1
.
Pin 1
Pin 13
Pin 14
Pin 25
F
IGURE
6-3:
T
RIGGER
B
US
DB-25
C
ONNECTOR
Pin
Signal
Pin
Signal
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
T
ABLE
6-1:
LXI
T
RIGGER
B
US
C
ONNECTOR
P
IN
A
SSIGNMENTS
IEEE
1588
The IEEE 1588 standard was introduced to provide a vehicle for test and measurement equipment
to be synchronized, with submicrosecond accuracy, over Ethernet. Rather than using a coaxial
cable to synchronize instruments in a test station, a low-cost Cat 5e cable can be used. Should an
IEEE 1588 error occur, the 1588 LED on the EX2500A front panel will glow red (see LEDs in
Section 3
for more information).
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