Comark Releases PARALLAX All-In-One Transmitter For Non-Repack And NextGen TV

Hitachi Kokusai Electric Comark (“Comark”), has announced the release of the PARALLAX All-In-One (AIO) DTV transmitter for non-repack and NextGen TV requirements.

Comark originally introduced the PARALLAX liquid-cooled, solid-state DTV transmitter product line at NAB 2015. PARALLAX AIO is a simplified and compact version of the transmitter and is intended for medium power DTV requirements. The benefit of the AIO design is that it incorporates the complete liquid cooling system and RF filtering inside the transmitter cabinet in lieu of external subsystems. The benefit of the PARALLAX AIO is that on-site installation time is drastically simplified; the field engineer only needs to connect the transmitter’s RF output to the transmission line and two cooling hoses to the outdoor heat exchanger.

The AIO can be equipped with 3 to 8 Power Amplifiers (PA’s) in a single transmitter cabinet, delivering from 5.4 to 13kW TPO. PARALLAX AIO continues to ensure top-notch performance since the PA’s utilize the latest asymmetric broadband Doherty LDMOS FET devices. These devices not only provide broadband high efficiency operation but also have the benefit of providing the equivalent output power in ATSC 1.0 (8VSB) and ATSC 3.0 (OFDM).

The DTV transmitter’s RF system, fully contained in the transmitter rack cabinet, accommodates either 6 or 8-pole variations. The RF system also includes a motorized RF output switch and liquid cooled station load, with switch control fully integrated into the transmitter’s control system.

According to Tom Barbeau, Hitachi Kokusai Electric Comark VP of Engineering, “international DTV conversions, non-repack, and NextGen TV requirements demand streamlined transmission solutions and the PARALLAX AIO product delivers. We have engineered the best possible solution using state of the art amplification, efficient cooling, and RF mask filtering in a package that gets a site on-the-air in just a few days.” 

You might also like...

Sinclair’s Broadcast App Explained

A NextGen TV Broadcast App can make an exciting first impression because it immediately stands out when a NextGen TV is tuned to an ATSC 3.0 station broadcasting the app. The Sinclair Broadcast App is the first TV Broadcast App to…

Improving Comms With 5GHz - Part 2

This is the second instalment of our extended article exploring the use of the 5GHz spectrum for Comms.

Improving Comms With 5GHz - Part 1

As broadcasters strive for more and more unique content, live events are growing in popularity. Consequently, productions are increasing in complexity resulting in an ever-expanding number of production staff all needing access to high quality communications. Wireless intercom systems are…

ATSC 3.0: Right Place, Right Time

Many people and cultures celebrate special New Year dates. Organizations designate fiscal years. Broadcasters traditionally mark their new technology year mid-April, at annual NAB Shows. Old habits die hard.

Remote RF System Monitoring Over IP

Digital technology is changing how and where some mission-critical TV RF engineering work can be performed.