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C H A P T E R T E N
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R T M 3 2 0 5 U s e r M a n u a l
R E A R - P A N E L I / O
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1 PPS Option
The 1 PPS Option is a standard TTL output. The pulse width is normally 1 millisecond wide when
shipped from the factory but can be changed (see below). For details on the 1 PPS signal definition
see
Appendix K - Specifications, 1 PPS Output
.
View the 1 PPS Connector
The
cpuio
command will list any connector on the RTM3205 that has an I/O signal. Connectors are
identified as A, B, C or D.
Command:
cpuio
RTM3205 reply:
CPU I/O B - 1 PPS OUTPUT is Installed
Current Setting = (See systemio command)
Change the 1 PPS Pulse Width
Use the
systemio
command to view the 1PPS pulse width. Use the
systemioconfig
command
to channge the pulse width. You will be able to choose from these pulse widths: 20 microseconds, 1
millisecond, 100 milliseconds and 500 milliseconds.
Command:
systemio
RTM3205 reply:
System I/O Signal 1 PPS OUTPUT is Installed
Current Setting = 1 Milliseconds Pulse Width
Command:
systemioconfig
RTM3205 reply: Interactive script is started so you can change the pulse width.
The 1 PPS is a “system signal”. This means that there is one 1 PPS signal that affects the whole sys-
tem. In other words, if your RTM3205 has multiple 1 PPS outputs and you change the pulse width,
then all 1 PPS outputs will be affected.
Summary of Contents for RTM3205
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