CJWV Builds From the Ground Up
Behind the scenes
Engineering is home to the bulk of the broadcast equipment, network switches and office servers. It has a dedicated HVAC unit to keep the temperature at a constant 74 degrees year round. All of the workstations used in the studios are here, connected to their respective studios by KVM extenders. A workstation loaded with Wheatstone's Navigator software is used for configuration and backup of the Wheatnet IP system. A Davicom Mac 208 monitors program and off-air feeds, room temperature, power, etc. and reports alarms to technical staff via email and phone. It can also be used to switch studios, or put the play out system directly to air. Switching sources to air can also be triggered from a pushbutton panel by staff on site.
AGC level control of program audio is provided by Junger Levelmagic LT processors. The studios are linked to the transmitter site by a dedicated Ethernet point-to-point T1 circuit. Program audio moves from the AGC stage across the T1 via redundant APT Horizon audio codecs. Once at the transmitter site audio is processed primarily by an Omnia 6EX, backed up by an Omnia 1. The T1 also allows technical staff to take control of equipment at the transmitter site from the studios.
A pair of Nautel VS 2.5 transmitters in a main/standby configuration produce the 1.85kW required to transmit 7kW max ERP. The control system was designed and programmed by independent contractor John McCloy and uses a Davicom Mac 216 to monitor and remotely control all systems at the transmitter site. It will automatically change transmitters or STLs/processors in the event of a failure and report alarms to engineering staff by email and phone.
- continued on page 4
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