Spectracom SecureSync - Revertive Selector Card [1204-2 E]

Alarm Type:
None: Will not output for an alarm.
Minor: Will output on a minor alarm.
Major: Will output on a major alarm.
5.2.7.4 Revertive Selector Card [1204-2E]
The Revertive Selector Option Card provides automatic failover capability, using one option
card slot for a single output signal.
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 presented. 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".
500 SecureSync User Reference Guide
APPENDIX