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 The Maxiva™ VLX VHF liquid-cooled transmitter (formerly Platinum™ VLX) delivers the newest and most advanced VHF transmission platform with exceptional power efficiency, superior RF performance, and a modular user-friendly design. These capabilities along with the Maxiva VLX’s flexible configurations and superior power density provide the critical features upon which broadcasters can build their network.

 
The Maxiva VLX incorporates the PowerSmart® solid-state architecture with 50 Volt LDMOS amplifier devices and the Maxiva M2X™ exciter technology with RTAC™ to provide today’s broadcaster with leading power efficiency and unmatched signal performance. The VLX power amplifiers have a record of proven performance and reliability with Harris Broadcast transmitters and are in use around the world. This powerful blend of technologies provides best-in-class performance with respect to power efficiency, transmitter size and user features. The modular design allows for simpler installation, easier maintenance and reduced total cost of ownership over the life of the transmitters. The VLX is available over a wide range of output power configurations that are suitable for broadcast applications where liquid cooling and space considerations are a premium.
 
The Maxiva VLX transmitter is capable of multiple modulation schemes for band III VHF analog or digital TV and digital radio operation — including ATSC, ATSC MDTV, DVB-T/H, DVB-T2, ISDB-Tb, DAB/DMB and future digital standards. Upgrading from analog to digital or to newer digital standards is readily accomplished to further extend the capability and life of the transmitter.

FEATURES
  • PowerSmart technology, for best-in-class power efficiency and lowest operating costs
  • Rugged, reliable design and construction
  • Digital power levels up to 33.6 kW ATSC, 28.8 kW DAB and 19.2 kW 
  • DVB-T/DVB-T2/ISDB-Tb
  • Analog power levels up to 48 kW
  • Incorporates field-proven Maxiva M2X exciter technology, allowing easy migration from analog to digital or between different standards
  • All-digital linear and nonlinear pre-correction, including exclusive Real-Time Adaptive Correction (RTAC™)
  • Fully broadband PA ruggedized modules — 168 to 242 MHz
  • 1:1 PA pallet to power supply redundancy
  • Hot-pluggable linear RF amplifier modules
  • Transmitter monitoring and in-depth diagnostics via easy-to-use, front-panel controls

SPECIFICATIONS

 

Specifications and designs are subject to change without notice.

 

General
Frequency Range 168 to 242 MHz, in 1 Hz steps
Transmission Standards ATSC, DVB-T, DVB-T2, ISDB-Tb, Analog, DAB
Channel Bandwidth 1.5, 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, 1-5/8 or 3-1/8 in. EIA (dependent upon power level, DIN 7-16 optional for lower power levels)
 
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 (6.2 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 Specification
Power Output (average) 800 W to 6.4 kW models available, measured before mask filter (see chart below)
Systems DVB-T, 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 (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
 
DAB/DMB Specification
Power Output (average) 1.2 kW to 9.6 kW models available, measured before mask filter (see chart below)
Systems DAB/DMB (OFDM) ETSI EN 300 401 & ETSI TR101 496-1
Power Stability ≤ ±0.25 dB
Harmonic/Spurious Output Complies with EN 302077-2 when used in conjunction with proper band pass filter
Shoulder Before Filter 35 dB minimum, >36 to 40 dB typical
MER >25 dB
Signal Inputs ETI Input: BNC-female, user selectable 75 ohms or high impedance termination. 2x ETI (NI, G703) or 2x ETI (NA, G704), seamless input signal switch-over automatic optional 
EDI Input: 10/100 Base T RJ45, per ETSI TS 102 693 V1.1.2, 1 channel, UDP/DCP or TCP/DCP protocol
Monitoring Outputs ETI Monitor 
2.048 MHz 
Sync ETI 
Sync OFDM
 
ATSC Specification
Power Output (average) 1.4 kW to 11.2 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 Broadcast-supplied output filter
 
Analog
Power Output (vision peak of sync) 2.0 kW to 16 kW models available, measured before 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
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
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.

 

VLX Power Levels

Model Number Number of Cabinets Number of PA Modules RF Output Power (W) 
Pre-Filter
VLX-2000AN 1 2 2,000/200
VLX-1200DA 1,200
VLX-1400AT 1,400
VLX-800DV/T2/IS 800
 
VLX-4000AN 1 4 4,000/400
VLX-2400DA 2,400
VLX-2800AT 2,800
VLX-1600DV/T2/IS 1,600
 
VLX-6000AN 1 6 6,000/800
VLX-3600DA 3,600
VLX-4200AT 4,200
VLX-2400DV/T2/IS 2,400
 
VLX-8000AN 1 8 8,000/800
VLX-4800DA 4,800
VLX-5600AT 5,600
VLX-3200DV/T2/IS 3,200
 
VLX-12000AN 1 12 12,000/1,200
VLX-7200DA 7,200
VLX-8400AT 8,400
VLX-4800DV/T2/IS 4,800
 
VLX-16000AN 1 16 16,000/1,600
VLX-9600DA 9,600
VLX-11200AT 11,200
VLX-6400DV/T2/IS 6,400
 
VLX-32000AN 2 32 32,000/3,200
VLX-19200DA 19,200
VLX-22400AT 22,400
VLX-12800DV/T2/IS 12,800
 
VLX-48000AN 3 48 48,000/4,800
VLX-28800DA 28,800
VLX-33600AT 33,600
VLX-19200DV/T2/IS 19,200

 

Modulations 
AN - Analog 
DA - DAB 
AT - ATSC 
DV - DVB-T 
T2 - DVB-T2