Descriptions of the settings shown in the Status window can be found "IRIG Output: Edit Win
dow" on page396. For IRIG frequency and output specifications, see "IRIG Standards and Spe
cifications" on page523.
5.2.5.2 IRIG In/Out [1204-05, -27]
The IRIG Input/Output option card provides SecureSync with one IRIG input and two IRIG out
puts. The IRIG input can be used as the primary SecureSync time and 1PPS reference input for
synchronization. Or, it can also be used in conjunction with other primary references (such as
GNSS and NTP) to synchronize SecureSync. Available with BNC or Fiber Optic ST connectors.
IRIG In/Out, BNC [1204-05]: Input Specifications
Input Signal: IRIG A, B, G or NASA-36;
amplitude modulated sine wave (AM) OR pulse-width-coded (DCLS); user-selectable, with
automatic switching of load on input
AM Carrier: IRIGB 1000Hz, IRIGA 10kHz and G100kHz
AM Signal Level: 500mV to 10V
p-p
(modulated 2:1 to 6:1); 50 Ω load
DCLS Signal Level: TTL; 0.8V max., 2.3V min fail.; >10kΩ load
Connector: AM and DCLS: BNC female
Accuracy: n/a
Number of Cards: Up to 6
Ordering Information: 1204-05, IRIG module, BNC Connector
400 SecureSync User Reference Guide
APPENDIX
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