Spectracom SecureSync 1200 User Reference Manual page 411

Optical Power : -15 dBm average into 50/125 fiber
Fiber Optic Compatibility : 50/125 μm, 62.5/125 μm multi-mode cable
Optical Connector : ST
Signal Type : DC Level Shift (unmodulated)
Accuracy : see "IRIG Output Accuracy Specifications" on page 539
Maximum Number of Cards : 6
Ordering Information : 1204-1E Four IRIG Output Module, Fiber Optic
Figure 5-38:
Model 1204-1E option card rear plate
IRIG Out (RS-485): Specifications
Inputs/Outputs : (4) IRIG Outputs
Signal : IRIG A, B, E, G or NASA-36
Signal Type and Connector : RS-485 levels (terminal block)
Output Load Impedance : 120 Ω
Accuracy : see "IRIG Output Accuracy Specifications" on page 539
Maximum Number of Cards : 6
Ordering Information : 1204-22 Four IRIG Output Module, RS-485
Figure 5-39:
Model 1204-22 option card rear plate
Pin Assignments
SecureSync User Reference Guide
APPENDIX
395