Safran SecureSync 2400 User Manual page 560

APPENDIX
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
544
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
TTL (50 Ω)
Default Power-on Switch
Initially, input "B"; until a valid signal on input "A" is detected, causing the
switch state to change to "A".
Maximum Number of
Ordering Information: 1204-2E: Revertive Selector Option Module
p-p
State:
Cards: 6
SecureSync 2400 User Manual