M e r i d i a n I I U s e r M a n u a l
100
C H A P T E R T E N
101
M e r i d i a n I I U s e r M a n u a l
R E A R - P A N E L I / O
Time Code Output
The Time Code output shown in the drawing above as “A-AMCODE” is a standard output on Meridian
II. There are two different kinds of Time Code outputs. Either amplitude-modulated (AM) or DC-
Shift. DC Time Code is an option and, for example, would be labeled as “C-DCCODE”.
Time Code is a “system signal”. This means that there is one Time Code signal that affects the whole
system. In other words, if your Meridian II has multiple Time Code outputs (AM and/or DC) and you
change the Time Code format, then all Time Code outputs will be affected.
The Time Code output is normally IRIG-B122 (AM) or B002 (DC) when shipped from the factory
but can be changed (see below). For details on signal definition see
Appendix K - Specifications, AM
Code Output
or
Appendix K - Specifications, Optional DC Code Output on CPU Module
.
View the Time Code Connector
On the front-panel display traverse to the Main Menu and then to CPU_I/O. This display lists any
connector on the CPU Module that has an optional I/O signal. Connectors are identified as A, B or C.
Select the particular connector (I/O-A, I/O-B or I/O-C) to see which signal is installed.
Or, you can use this console port command:
Command:
cpuio
MeridianII reply:
CPU I/O A - AM TIME CODE OUTPUT is Installed
Current Setting = (See systemio command)
Change the Time Code Format
On the front-panel display traverse to the Main Menu and then to Sys_I/O. If a Time Code output is
installed in your unit, then there will be a selection for TCodeOut. Select this and you will be able to
choose from among several different Time Code formats.
Or, you can use these console port commands to change the format:
Command:
systemio
MeridianII reply:
System I/O Signal TIME CODE OUTPUT is Installed
Current Setting = IRIG-B122/B002 Format
Command:
systemioconfig
MeridianII reply: Interactive script is started so you can change the Time Code format.
CPU Module Options
In addition to the standard I/O described above, the CPU Module can be configured with one (1U) or
four (2U) optional outputs. Some of these optional outputs are a Programmable Pulse Output, Digital
Code Output, DDS Output, Alarm Output, various pulse rates at RS-422 levels, and a second RS-232
serial port with a Serial Time Output. See the two sample CPU Module configurations below.
Summary of Contents for Meridian II
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