NRK chooses Leader equipment for its new OB24 expanding trailer

External view of the OB24, the latest NRK's OB Truck

Norwegian public broadcaster NRK has chosen Leader waveform monitors and rasterising test equipment as the core reference instruments for its latest-generation mobile production trailer, OB24. Newly completed by Lithuanian system integration specialist TVC, the vehicle includes seven Leader test instruments and an LT4448 error-detecting automatic channel switcher. 

“At 13.6 metres long and weighing 26 tonnes, OB24 is one of the largest vehicles in our fleet,” comments Aras Kriaučiūnas, Head of TVC’s Projects Management Group. “Equipped with 24 dedicated workplaces, it comprises a camera control suite, a slow-motion video effects facility, two production galleries, an audio control suite, plus an apparatus and server room. OB24 is a no-compromise vehicle designed to handle simultaneous feeds from 28 cameras. Colour matching that number of sources during a large-scale OB requires very careful signal monitoring. Four Leader ZEN-series LV5350 portable 12G/3G/HD/SD-SDI waveform monitors were chosen for the camera control suite plus a ZEN-series LV7300 rasterizer for the main production gallery.”

“We have also integrated two LT4610 3G/HD/SD multi-format video sync generators into the apparatus room where they will be used to generate reference sync, test patterns, logos, safe-action and safe-title markers as well as audio test tones. A Leader LT4448 auto changeover unit constantly monitors critical channels during the production process and either generates an alert if it detects any error or, if desired, switches automatically to a backup source. Other key infrastructure provided includes EVS slow motion effects, Genelec loudspeakers, Grass Valley (video router and multiviewer), Lawo and Yamaha audio mixing, Riedel fibre networking, Sony (cameras, video mixer and picture monitors), Vislink wireless camera links and Vizrt graphics” adds Kriaučiūnas.

Leader’s LV5350 waveform monitor and LV7300 rasterizer incorporate a wide range of SDI signal testing features. These include engineering-related reference tools such as test pattern generation, closed-caption monitoring, CIE colour chart, high dynamic range measurement, focus assist, customisable screen layout, tally interface, 4K/UHD operation and 12G-SDI interfaces. The LV5350 and LV7300 also incorporate Leader’s CINEZONE and CINELITE.

The LT4610 is a 1U x 400 mm front-to-back 3G/HD/SD multi-format video sync generator. Test patterns available from the LT4610 include 100% and 75% color bars, multi-format colour bars and SDI check fields with user-selectable scrolling in eight combinations of up/down/left/right. Scrolling speed is user adjustable from 1 to 256 pixels or lines. Y/G, Cb/B, Cr/R components can be turned on or off independently for each output channel. The LT4610 has a genlock input and can be synchronized with NTSC/PAL black burst or HD tri-level sync signals. Standard support for SNMP via Ethernet makes it easy to integrate the LT4610 into a network environment. Alarms are generated with SNMP and displayed on the front panel when errors do occur.

Designed for use standalone or in combination with the LT4610, the LT4448 is a changeover unit that automatically switches from the primary signal to the backup signal when problems are detected in the primary signal. A single LT4448 provides 11 channels which can receive LTC, SDI, NTSC/PAL black burst, HD tri-level sync, AES/EBU digital audio, and word-clock signals. SDI signals are switched with relays. All other signals are switched with electronic switches. Redundant power supplies are included.

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