Maxiva™ UAX

Air-Cooled UHF Multimedia TV Transmitter

The Maxiva™ UAX air-cooled UHF solid-state transmitter incorporates Harris® PowerSmart® and Apex M2X™ multimedia exciter technologies to provide today’s broadcaster unmatched performance, reliability and quality. Designed with future broadcasting needs in mind, the Maxiva UAX transmitter is a single transmitter platform capable of DVB-T/H, DVB-T2, ATSC, ATSC Mobile DTV, ISDB-Tb, CMMB, CTTB or other digital standards.

For pre-filter power output requirements up to 2.5 kW COFDM, 2.5kW 8VSB, and 3.75 kW analog, the Maxiva UAX transmitter is capable of serving broadcasters needs for efficient, easy to maintain transmitter systems. The UAX utilizes the Harris platform technologies such as the Apex M2X multimedia exciter, PowerSmart technology and 50v LDMOS amplifier devices. This powerful blend provides best-in-class performance with respect to transmitter RF performance, efficiency, size, and upgradeability.

Features

PowerSmart technology, for best-in-class power efficiency and lowest operating costs
Rugged, reliable design and construction
Digital and analog power levels up to 2.5 kW and 3.75 kW, respectively (before filter)
Apex M2X exciter technology, allowing easy migration from analog to digital or between different standards
Real-Time Adaptive Correction (RTAC™) technology is included with every system
Fully broadband power amplifier (PA) modules — 470 to 862 MHz
1:1 PA module to power supply (PS) redundancy
Hot-pluggable air-cooled linear RF amplifier modules and power supplies for simplified maintenance
Modular central control system for straightforward monitoring and in-depth diagnostics
Web-enabled remote graphical user interface (GUI)

Product Details

Increased Density and Efficiency via Harris PowerSmart Technology
Featuring Harris PowerSmart technology in its transmitter architecture, the Maxiva UAX line offers superior power and efficiency. New 50-volt LDMOS device technology delivers a dramatic increase in power density, lower operating costs and reduced cost of ownership over the life of the transmitter.

Improved Uptime and Reduced Service Costs
Redundant PA and universal power supply (PS) modules simplify on-air servicing and eliminate costly interruptions. Lightweight pallets and modules facilitate overnight/same-day shipping for simple, cost-effective spares holding. The Maxiva UAX transmitter also supports replacement of pre-tuned amplifier pallets in the field, eliminating the need for complex tuning after FET replacement.

Maximized Coverage with the Apex M2X Exciter
Utilizing the Harris Apex M2X multimedia exciter, the Maxiva UAX transmitter takes digital and mobile TV to the next level. Harris digital exciters have logged more hours in real-time broadcast than all others combined. The Apex M2X exciter provides a flawless signal with complete technical and regulatory compliance for tube- and solid-state digital transmitters.

Apex M2X supports a wide range of global digital standards including ATSC, ATSC Mobile DTV, DVB-T/H, ISDB-TB, FLO, CTTB, CMMB and a range of analog TV standards, including NTSC and PAL. It allows for a smooth conversion to digital transmission, and this flexibility, coupled with the exclusive Real-Time Adaptive Correction (RTAC) technology incorporated in the exciter, provides superior performance.

Compact Footprint
Suited for crowded, shared transmitter sites, the Maxiva UAX transmitter reduces facility space requirements and simplifies installation.

Powerful, Straightforward Monitoring and Control
The main system control is located in the low-power unit and communicates with each amplifier bay that has independent protection and control capabilities. Each power amplifier (PA) module has dedicated control and monitoring to support on/off functionality and alarms for reflected power, temperature and current overloads.

For maximum functionality, all dual drive Maxiva UAX systems include a Transmitter Control Unit (TCU). The TCU includes two parallel levels of operational support: a main microprocessor based controller and a back-up, or “life-support” controller. The main controller provides a front-panel, color touch-screen display, SNMP communications support and IP connectivity via the built-in Web GUI. Ideal for network operations, the control system can be accessed from anywhere in the world via TCP/IP over a telecom or network connection. The back-up controller provides minimal control and monitoring of the transmitter platform, using a small number of parallel signals, simple interface controls and front-panel controls and indicators.

Images/Diagrams

UAX-15AN

UAX-100 Digital/UAX-75/150AN

UAX-250 Digital/UAX-375AN

UAX-500 Digital/UAX-750AN

UAX-1000 Digital/UAX-1500AN

UAX-2000 Digital/UAX-3000AN

Specifications

Specifications and designs are subject to change without notice.

General
Frequency Range	470 to 862 MHz, in 1 Hz steps
Transmission Standards	ATSC, DVB-T, DVB-T2, ISDB-Tb, Analog, CTTB
Channel Bandwidth	6, 7 or 8 MHz (system dependent)
Rated Power Output	See chart below
Output Power Reduction Range	0 to -10 dB
RF Load Impedance	50 ohms
VSWR	Protected against open or short circuit, all phase angles. Capable of operation into infinite VSWR with user-adjustable fold back threshold. Factory pre-set to 4% of nominal nameplate power (VSWR = 1.5:1)
RF Output Connector	N-female, DIN 7-16, or 1-5/8” EIA (dependent upon power level)
Transmitter Dimensions	Refer to Harris outline drawing 8435602148
Transmitter Weight	Refer to Harris outline drawing 8435602148

AC Mains
AC Line Voltage	3 phase: 380 to 415 V, or 208 to 240 V, 50/60 Hz, or single phase 208 to 240 V, 50/60 Hz - specify when ordering
AC Line Variation	±15%, between 208 to 230 V or 380 to 400 V
Power Factor	>0.97 (0.98 typical)

Environmental
Altitude	Up to 13,123 ft (4,000 m) elevation above mean sea level
Ambient Temperature	32° to 113° F (0° to 45° C) at sea level (upper limit derated 3.6° F (2° C) per 984 ft (300 m) elevation AMSL)
Humidity	95%, non-condensing
Cooling Method	Air-cooled with internal fans, air flow front to rear (external air using optional front air plenum)
Acoustic Noise	<65 dBA (measured 1 m in front of cabinet), with external input air plenum/door
Frequency Stability	Without precision frequency control/GPS: ±150 Hz/month (2.3 x 10^-7ppm)

External Inputs
GPS Input	SMA female, 50 ohms, (+5 V DC @ 100 mA max output for active antenna)
1 PPS Input	BNC female, user selectable 50 ohms or high impedance termination
10 MHz Reference Frequency Input	BNC female, 50 ohms

Monitoring Outputs
RF monitor (exciter)	SMA female
1 PPS	BNC female
10 MHz	BNC female

DVB-T/DVB-T2 / ISDB-Tb / CTTB Specification
Power Output (average)	125 W to 2.5 kW models available, measured before mask filter (see chart below)
Systems	DVB-T/H, standard EN 300744 DVB-T2, standard EN 302 755 ISDB-Tb, Brazil ANATEL standard CTTB (China)
ASI/T2MI Inputs	2 inputs BNC female; 75 ohms according to EN 50083-9 (for DVB-H 2 main/2 hierarchical)
Crest Factor	13 dB maximum
Shoulder Level	<-37 dB (before mask filter)
END	<0.5 dB
MER	>34 dB (typical 36 dB)
Harmonics (before filter)	<-40 dB
Central Carrier Suppression	>75 dB
DVB-T2 Modes	Supports multiple PLP’s, MISO, extended bandwidth mode, PAPR reduction

ATSC Specification
Power Output (average)	125 W to 2.5 kW models available, measured before mask filter (see chart below)
System	ATSC A-53, 8-VSB DTV standard
Data Input	19.39 Mb/s, configurable as SMPTE-310M or ASI (user selectable)
Impedance	75 ohms, unbalanced
Input Connector	2 inputs, BNC female
Signal to Noise (EVM)	>27 dB (EVM <4%), Typical >32 dB (EVM <2.5 %)
Phase Noise	<104 dBc/Hz @ 20 kHz offset (ATSC A/64)
Harmonic Radiation and Spurious	Meets mask requirements specified in FCC 5th and 6th report and order
Sideband Performance	Compliant with FCC radiation mask, when measured at the output of Harris-supplied output filter

Analog
Power Output (vision peak of Sync)	15 W to 3.0 kW models available, measured after Harris supplied IMD filter (see chart below). 10% sound
Analog Television Systems	CCIR G, I, K, K1, M, N
Color Systems	PAL, NTSC, SECAM
Sound Systems	Monaural, BTSC, IRT, NICAM G

Analog Video Performance
Video Input	0.7 to 1.4 V, 75 ohms, 32 dB return loss
Regulation of Output Power¹	±3%
Variation of Output Power²	±2%
Vision Sideband Response³	PAL system G shown (other systems available) -1.25 MHz and below -20 dB or less -4.43 MHz -30 dB or less -0.75 to -1.25 MHz 0.5 dB or less -0.5 to 4.5 MHz 0.5 to -0.5 dB 5.0 MHz 0.5 to -2.5 dB 5.75 MHz and above -35 dB or less
Differential Gain⁵	3%
Differential Phase⁵	3°
Low Frequency Linearity⁶	10%
Incidental Carrier Phase Modulation⁵	±2°
Signal to Noise Ratio	>60 dB (weighted)
K Factor	2% or less with 2T sin² pulse
20T Equivalent Gain and Delay	3% total baseline distortion
Spurious and Harmonic Radiation	-60 dB, or better
In-Channel Intermodulation Distortion	-58 dB (-60 dB typical)

Analog Sound Performance
Modulation Capability	±120 kHz peak deviation
Monaural Input	Adjustable 0 to 12 dBm, 600 ohms, balanced, >30 dB return loss
Pre-emphasis	Selectable 75 or 50 µS
Frequency Response	±0.5 dB, 40 Hz to 15 kHz
Harmonic Distortion	0.5%, 30 Hz to 15 kHz
FM Noise	60 dB RMS with de-emphasis
AM Noise	50 dB RMS from 30 Hz to 15 kHz
Synchronous AM Noise	40 dB RMS at 400 Hz with ±25 kHz deviation
IRT Sound	Available
NICAM Sound	Available

Remote Control
Parallel Remote	25 conductor D-sub for single drive basic rack, 12 conductor terminal block (mini Wago) on deluxe rack
Ethernet/SNMP	RJ-45, twisted pair

Compliance	RoHS 2002/95/EC R&TTE 1999/5/EC Safety: EN 60215 EMC: EN 301-489-1 FCC Part 73 Manufacturing: ISO 9001: 2008

¹ Variation of peak output power with a change in average picture level from black to white (0% to 100%).

² Peak-to-peak variation of peak sync voltage during one field using field test signal per EIA-508.

³ Response specified for transmitter operating into a resistive load of 1.05:1 VSWR.

⁴ Measured using 20% peak-to-peak amplitude swept video modulation with pedestal set at 10%, 50% and 90% APL. All percentages relative to a blanking to white transition.

⁵ Measured using a 5-step staircase signal. Test signal #3, CCIR REC. #421-3.

UAX Power Levels

Digital Models (xx = modulation)	Power Before Filter (Watts)	Power After Filter (Watts)	RF Output Connector	Total Rack Space (*with dual exciters)
UAX-100xx	125	100	“N” Female	4RU
UAX-250xx	313	250	7-16 DIN	7RU
UAX-500xx	625	500	7-16 DIN	7RU
UAX-1000xx	1,250	1,000	7-16 DIN	12RU/ *17RU
UAX-2000xx	2,500	2,000	1-5/8” EIA	24RU/ *31RU
Analog Models	Power Before Filter (Watts)	Power After Filter (Watts)	RF Output Connector	Total Rack Space (*with dual exciters)
UAX-15AN	19	15	“N” Female	4RU
UAX-75AN	94	75	“N” Female	4RU
UAX-150AN	188	150	“N” Female	4RU
UAX-375AN	470	375	7-16 DIN	7RU
UAX-750AN	938	750	7-16 DIN	7RU
UAX-1500AN	1,875	1,500	7-16 DIN	12RU/ *17RU
UAX-3000AN	3,750	3,000	1-5/8” EIA	24RU/ *31RU