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CTP 5.2 Hardware Guide
CTP2000-IM-8P-IRIG Module
Installing and Removing Interface Modules
LEDs
24
Installing and Removing Interface Modules
The CTP2000-IM-8P-IRIG interface module enables an inter-range instrumentation
group time code (IRIG-B) signal to be transported through an IP network. IRIG-B is a
special time code transmission format that uses a hybrid analog/digital physical
interface.
The IRIG-B standard consists of a family of rate scaled serial time codes with
formats containing up to three coded expressions or words. The IRIG-B pulse code
contains one frame of 100 elements per second for the time of the year and GPS
receiver status. IRIG-B encodes day of year, hour, minute, and second data on a
1-KHz carrier frequency, with an update rate of once per second.
The CTP2000-IM-8P-IRIG module has eight ports and is available on CTP2000-series
models only. You can configure direction, output high and low levels, and data
range for this module. See the CTP Software Conguration Guide for configuration
information.
The system should be powered off when you insert or remove the module. You can
install an interface module by inserting it into the chassis with the extractors
unlocked and pushed outward. When you insert the module into the backplane
connector, the extractors are pushed inward; that motion inserts the module into
the connectors. Each module has two Phillips head screws which you use to lock the
module into the chassis. Loosen the screws to remove the module and push the
extractors outward while depressing the red latch.
Each interface module has two LEDs. The bottom LED is blue when the module is
functioning and the top LED states are as follows:
Yellow—Interface module is offline and not recognized by the system. This
state typically occurs when the system is first turned on and booting.
Green—Interface module is online and recognized by the system. The interface
module clocking is as configured.
The top interface module is used for input clock references, which are
distributed to the other modules across the backplane. The LED is green on the
top module if no clock reference is defined. The other interface modules should
always display the green LED.
Red—Interface module is online and recognized by the system. It either is not
using the clock distributed by the top interface module or the configured
references are not available to the top module.
Orange—Interface module is online and recognized by the system. The
configured clock is not available, and the system is in a holdover clocking
mode.
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