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.
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.
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.
As the world’s most compact liquid-cooled UHF transmitter, the Maxiva ULX is ideally suited for crowded, shared transmitter sites.
Specifications and designs are subject to change without notice.
|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 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)|
|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)|
|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)|
|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|
|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
|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)|
|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|
|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|
|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
|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|
|Parallel Remote||12 conductor terminal block (mini Wago)|
|Ethernet/SNMP||RJ-45, twisted pair|
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
|Power Output (Watts)|
|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|