Revertive Selector Card [1204-2E] - Spectracom SecureSync User Reference Manual

5.6 Miscellaneous Option Cards
The Status window displays the following settings:
Alarm Type :
5.6.2

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 ref-
erence at input "A" to stabilize before being used.
5.6.2.1 Model 1204-2E Specifications
Inputs/Outputs :
Connectors : 3 BNC
Signal Type : User selected (jumper switch):
420
None—Will not output for an alarm.
Minor—Will output on a minor alarm.
Major—Will output on a major alarm.
(2) Inputs – Unselected input terminated with 50 Ω
(1) Output
<1MHz
1MHz to 100 Hz
1PPS
CHAPTER •
5 SecureSync User Reference Guide Rev. 18