Date Code 20181001 SEL-3031 Instruction Manual
Installation
Front-Panel Indicators
2.15
IRIG-B Time-Code Input
The SEL-3031 accepts a demodulated IRIG-B time signal to synchronize the internal
clock with an external time source. IRIG-B is available on Port 2 utilizing Pins 4 and 6
for time communications. The SEL-3031 supports the IRIG-B002 standardized time
format.
Front-Panel Indicators
The SEL-3031 has ten front-panel LED indicators. Table 2.9 further describes these
indicators that display the current status of the radio. The LINK LED indicates when the
SEL-3031 has properly connected to another SEL-3031. The SEC LED deals with the
SEL-3044 Encryption Card. See Appendix B: Firmware Upgrade Instructions for more
information on using this card.
Table 2.7 Password Jumper Position
Password Enable/Disable Jumper Position
Jumper Installed (Password Disabled)
The jumper installed disables the passwords.
Jumper Removed (Default)
The SEL-3031 ships by default with passwords enabled.
Table 2.8 Communications Cables for Time and Communications Connections
EIA-232 Serial Port Connect to Device SEL Cable No.
Port 2 IRIG-B BNC with time only C256
SEL communications processors and com-
puting platform data with IRIG-B
a
a
If connecting to an SEL communications processor you must turn the 5V_EN Global setting in
the SEL-3031 to OFF.
C387
IRIG-B only from DB-9 on SEL-2407
®
C388
JMP2JMP2
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