Maxiva™ ULX

Liquid-Cooled UHF Multimedia TV Transmitter

The Maxiva™ ULX UHF liquid-cooled, solid-state transmitter provides today’s multimedia broadcaster with one transmitter platform capable of multiple modulation schemes. Featuring the proven Apex M2X™ multimedia exciter at its core, the Maxiva ULX transmitter is an ideal solution for digital applications, as well as any analog broadcaster planning a future transition to DVB-T/H, DVB-T2, ATSC, ATSC-MDTV, ISDB-Tb, CMMB, CTTB, and other digital standards.

Maxiva ULX transmitters incorporate Harris® PowerSmart® technology, enabling best-in-class power-density and efficiency. With digital power levels up to 28.1 kW COFDM and 44.6 kW ATSC and analog power levels up to 75 kW, the Maxiva ULX transmitter offers the best footprint-to-power ratio in the industry — allowing for simplified installation, easier maintenance and reduced total cost of ownership over the life of the transmitter.

Features

PowerSmart technology, for best-in-class power efficiency and lowest operating costs
Apex M2X exciter technology, allowing easy migration from analog to digital or between different standards
Rugged, reliable design and construction
Analog power levels up to 75 kW, digital power levels up to 44.6 kW ATSC, 28.1 kW COFDM
All-digital, real-time adaptive linear and nonlinear precorrection
Fully broadband power amplifier (PA) modules — 470 to 862 MHz with no adjustment
1:1 RF device to power supply ratio for ultimate redundancy
Hot-pluggable liquid-cooled linear RF amplifier modules
Automatic restart after AC mains interruption; returns to previous operational mode
Modular central control system, for straightforward monitoring and in-depth diagnostics
Web-enabled remote graphical user interface (GUI)
Energy-efficient cooling system adapts pump and fan speeds to varying environmental conditions

Product Details

Best-in-Class Efficiency
Featuring Harris PowerSmart technology in its transmitter architecture, the Maxiva ULX line offers unmatched efficiency that makes it ideal for all high-power UHF applications. 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.

Powerful, Straightforward Monitoring and Control
The Maxiva ULX transmitter features a modular central control system within the main transmitter cabinet. It is housed in a rackmounted 3RU chassis featuring convection cooling and integrated, low-voltage control power supply with redundancy. The main controller communicates with the transmitter modules and the exciters, as well as the cabinet level controllers located in additional cabinets. Individual cabinet controllers provide for maximum redundancy and independent operation in times of service or fault, while still providing full protection.

For maximum functionality, all Maxiva ULX 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.

Easy Migration from Analog to Digital
The Apex M2X multimedia exciter supports a broad range of analog, digital, and mobile standards and allows for a smooth conversion from analog to digital operation. This flexibility, coupled with Real-Time Adaptive Correction (RTAC™), provides superior performance.

Simple Serviceability and Maintainability
Distributed control architecture provides for outstanding reliability and soft failure operation. The modular-designed PAs enable simple sub-module replacement, rather than the entire amplifier module. On-air servicing has been simplified, and costly service interruptions are virtually eliminated with the hot-pluggable, redundant power amplifier/power supply modules.

Reduced Service Costs
Lightweight, universal PA pallets and power supply modules facilitate overnight/same-day shipment from a centralized depot for simple and cost-effective spares holding. Lightweight subassemblies eliminate two-person lift requirements for maintenance and troubleshooting, resulting in labor-related cost savings.

Enhanced Redundancy
The Maxiva ULX transmitter supports a range of backup options. In dual-drive systems, the integrated control system monitors exciters and switches control and RF feeds. The control system also supports options for 1+1 and full N+1 installation — monitoring and controlling each transmitter system, input stream and RF switching.

Compact Footprint
As the world’s most compact liquid-cooled UHF transmitter, the Maxiva ULX is ideally suited for crowded, shared transmitter sites.

Images/Diagrams

Configuration

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 2.8% of nominal nameplate power (VSWR = 1.4:1)
RF Output Connector	1-5/8”, 3-1/8” or 4-1/16” EIA (dependent upon power level)
Transmitter Dimensions	Refer to Harris outline drawing 8435601179 (1 rack), 8435601293 (2 racks), or 8435601302 (3 racks)
Transmitter Weight	Refer to Harris outline drawing 8435601179 (1 rack), 8435601293 (2 racks), or 8435601302 (3 racks)

AC Mains
AC Line Voltage	3 phase: 380 to 415 V, or 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	Liquid-cooled, using 50/50 mix of ethylene or propylene glycol and water
Acoustic Noise	<65 dBA (measured 1 m (3.3 ft) in front of cabinet)
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)	1.1 kW to 28.1 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	>33 dB (typical 35 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)	1.7 kW to 44.6 kW models available, measured before mask filter (see chart below)
System	ATSC A-53, 8-VSB DTV standard, ATSC Mobile DTV
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)	3.2 kW to 75 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	12 conductor terminal block (mini Wago)
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.

ULX Power Levels

Number of Cabinets	Number of PA Modules	Power Output (Watts)
		ATSC		COFDM				Analog
		Pre-Filter 470-698 MHz	Pre-Filter >698 MHz	Pre-Filter 470-494 MHz	Pre-Filter 495-630 MHz	Pre-Filter 631-670 MHz	Pre-Filter >670 MHz	Pre-Filter	Post-Filter
1	2	2000	1700	1200	1200	1200	1100	3600	3200
1	3	3000	2600	1800	1900	1800	1700	5200	5000
1	4	4000	3400	2400	2500	2400	2300	7100	6800
1	6	6000	5200	3600	3800	3600	3400	10500	10000
1	8	8000	6900	4800	5000	4800	4400	13800	13000
1	10	9600	8300	5700	6100	5700	5500	17000	16500
1	12	11500	10000	6900	7300	6900	6500	20900	20000
1	16	15400	13300	9200	9700	9200	8700	26200	25000
2	18	16900	14700	10400	11000	10400	9800	31400	30000
2	24	22200	19300	13300	14100	13300	12600	41400	40000
2	32	29800	25700	17800	18700	17800	16800	51800	50000
3	36	33300	29000	20000	21200	20000	18800	62100	60000
3	48	44600	38500	26700	28100	26700	25200	77600	75000