The 818-OP/SC is engineered to provide backup reliability in a compact, easy to use, and economical package. When inserted in the PCO-818 frame, it's advanced modular design provides a level of flexibility never before available in an Automatic Changeover unit. When combined with it's sync generator companion, the SPG-812, the PCO-818 frame can offer the best performance and reliability available today.
The basic function of the 818-OP/SC is to monitor an installation's analog subcarrier signal and automatically switch to a backup analog subcarrier signal in the event of a failure. It's modular design offers several advantages over traditional automatic changeover units.
Monitor only the signals used by the system: no need to pay for monitoring capability that is not required by the system. Install only the modules you need now-add more later.
Since the PCO-818 frame and the SPG-812 frame share a common chassis, modules may be interchanged between units. It also allows us to mix analog and digital signal monitoring in the same chassis. For example, a television station may use a SPG-812 primary module, backup module, and changeover module,all installed in either chassis.
In addition, the 818-OP/SC is designed such that AC mains failure will not erase the memory of it's last generator selection. A dual-coil latching relay provides areliable signal path even if power is lost to the 818-OP/SC. Meanwhile, its power supply features a "universal" voltage input range of 85VAC to 260VAC. In extreme conditions, the 818-OP/SC would be the last unit to shut down in the event of an AC mains failure.
Bi-color LEDs provide instant status indication for each signal in your system. If a particular signal is not in use, the LED can be easily de-selected (dark) rather than produce a false failure (red) indication. A "Manual/Automatic" switch allows the user to over-ride the automatic changeover function and select either generator in the system.
As your system grows and new technology arrives, the PCO-818 series of modules stand ready to grow with you. Backed by our standard 10-year warranty, the 818-OP/SC will offer years of reliable service.
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