Section 3 - E-Compact Medium Power Series Uhf Digital Tv Transmitters; Overview - Hitachi E-Compact Medium Power Series Operation Manual

Section 3 – E-Compact Medium Power
Series UHF Digital TV Transmitters

1. Overview.

The E-Compact Medium Power family of air cooled Doherty solid-state transmitters from Hitachi
Kokusai Linear was designed specifically for the repack market place. Its design is simple, rugged,
reliable, and ultra-efficient. Advanced standard features are included to ensure:
• ensure maximum transmitter efficiency using Doherty amplifiers
• ensure maximum flexibility with broadband amplifier technology (470-806MHz)
• ensure optimum signal performance in all operating modes
• ensure maximum reliability for 100% power output
• ensure ease of initial setup and operation
• ensure ease of monitoring and diagnostics
• ensure flexible solutions for all installations
The E-Compact Medium Power Family of solid-state DTV transmitters includes two models that
provide transmitter power outputs (TPO) from 150 to 300 watts ATSC 3.0. Each power amplifier
module has an excellent power density, with 2RU and 19". Featuring high gain Broadband Doherty
LDMOS configured for transmitting provides high efficiency and consumption cost reduction of up
to 60% when compared to conventional transmitters. The final power amplifier configuration in
parallel depending on output power level required. The transmitters are compliant with all FCC
and ATSC requirements.
We recommend the use of the EXACT-V2 DTV driver with linearization circuits to compensate for
linear and non-linear distortions for the E-Compact Medium Power line transmitters. EXACT-V2 is
software upgradeable for compatibility with ATSC 3.0.
The E-Compact family of solid-state TV transmitters includes a human-machine interface via an
LCD display on the front panel and menus activated by programmable keys. Alarm indicators and
normal controls, as well as power readouts, are available on the LCD.
There are two basic E-Compact Medium Power transmitter equipment configurations available:
1) Single Drive = One exciter driving the amplifier chain (SD)
2) Dual Drive = Two exciters {main/standby selectable} driving the amplifier chain (DD)
E-Compact Medium Power
20 | 106