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7.10 Set IRIG-B Main
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7.10
Set IRIG-B Main
There are two separately-controlled IRIG-B outputs in the Model 1094B: “Set IRIG-B Main” and
“Aux IRIG-B Mode.” Configure the main IRIG-B settings from this section, and auxiliary (AUX)
IRIG-B mode from Section 7.9.13. In this way, you can set up two different time zones for IRIG-B,
or you can independently turn the IEEE 1344 extension ON or OFF in either mode.
In the Model 1094B, IRIG-B is an electronic time code, synchronized to the GPS, that is
transmitted each second. The four choices are (1) setting the time zone to UTC or Local, and
(2) having the IEEE-1344 extension turned ON or OFF. To transmit the IRIG-B time code in the
UTC time zone, the time will be offset from your local time determined by your locale. IEEE-1344
extension increases the amount of information contained in the time code, including the two-digit
date and time quality. To use the IEEE-1344, your receiving equipment (e.g. relays, RTU’s, etc.)
must be designed to receive the IEEE-1344 time code. See Figure 7.20.
NOTE
: Make sure to set your main board jumpers correctly for each of the IRIG-B outputs.
For information on setting the IRIG-B jumpers, see Section 5.2.
Figure 7.20: IRIG-B Configurations
For additional detail and definition on the different forms of IRIG-B, see Chapter 8, Timing,
IRIG-B and Pulses.