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KPNC is a mirror image of KLOR.

KPNC is a mirror image of KLOR.


The operation centers around Logitek IP-based Jetstream-Mini audio engines and Remora 10-fader consoles. The Jetstream chassis is 2RU and is convection-cooled, thus quiet in the room. Logitek's intention was for them to be mounted in each studio and then networked. However, in this installation there are very few audio components actually in the studios so it was more cost effective to have three Jetstreams rack mounted in the TOC and all audio home-run to there. Only the microphones and their processors, CD player, monitor amps and speakers and headphone amps are actually in the studio. All of the computers, monitor receivers, the Comrex STAC phone systems, EAS and other critical equipment are all in the TOC.

Each Jetstream audio engine has slots for eight input or output cards, either analog or digital. A gigabit network connects the Jetstreams together so that any input can be used in any studio or routed to any output in the system.

The entire studio installation is wired using Studio Hub+. This uses shielded CAT5 cables with RJ-45 connectors. RJ-45 patch panels from Studio Hub are used between the TOC and each studio. Since the Jetstream inputs and outputs are Studio Hub compliant, the wiring went quickly.

The production room on the second floor is adjacent to the TOC.

The production room on the second floor is adjacent to the TOC.

Three Broadcast Tools switchers are used for the transmitter feeds, one for each station. Included on these switchers are all three studios and automation systems. This allows total flexibility in using studios for production or doing maintenance as needed. These switchers interface with the Logitek system and operators have control buttons in each studio.

The TOC is also a small room so everything had to fit into three racks. The front side of the first rack is for transmitter-feed switching and engineering functions. A 22" monitor is rack-mounted along with a pull-out keyboard drawer and rack-mounted KVM switches. Other devices and 22 PCs can be monitored and administrated.

Graham Studio's cabinetry, racks and the electronics were shipped to Sierra Multimedia in Arkansas for assembly, wiring and testing.

Graham Studio's cabinetry, racks and the electronics were shipped to Sierra Multimedia in Arkansas for assembly, wiring and testing.

With the engineering KVMs and many of the computers available in several studios for redundancy and convenience, almost all of the computer's keyboard, mice and monitors are split. The use of wide-screen format monitors throughout the station brought out one problem. Computer monitors report to the computer their make, model and resolution through a protocol called EDID. Computers then set the video card settings accordingly. On many systems, if the computer thinks the monitor is a 4:3 aspect ratio monitor, it will not even offer wide-screen formats to choose. With VGA splitters and KVM switches that do not pass the EDID to the computer, 4:3 formats cannot be chosen. The reason this is a problem is that the monitor will stretch the image -- circles become ovals.

The solution to this was to trick the computer into thinking a monitor of the desired format and resolution was connected directly to the computer. This was accomplished using a device from Gefen called a DVI Detective. Once set it always reports to the computer that the monitor is what you want it to be.

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