Safran SecureSync 2400 - Page 560

Operating Principle
The output follows the selected input. Signals can be 1PPS, 10MHz, 5MHz or
1MHz.
Input “A” is selected if present and valid. If input “A” disappears, or if power to
host SecureSync is interrupted, input “B” is presented at output “OUT”.
As soon as input “A” becomes valid again, the output switches back to use “A” as
source.
At power-up or module reset, there is a timed delay before input “A” is presen-
ted. This allows reference at input “A” to stabilize before being used.
Model 1204-2E Specifications
Inputs/Outputs:
(2) Inputs – Unselected input terminated with 50Ω
(1) Output
Connectors: 3 BNC
Signal Type: User selected (jumper switch):
>1MHz
1MHz to 100Hz
1PPS
Signal Level:
Sine Wave, 0.5V to 30V
p-p
TTL (50 Ω )
Default Power-on Switch State:
Initially, input “B”; until a valid signal on input "A" is detected, causing the
switch state to change to "A".
Maximum Number of Cards: 6
Ordering Information: 1204-2E: Revertive Selector Option Module
544 SecureSync 2400 User Manual
APPENDIX