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Máy phát hình > Máy phát hình Harris VHF Platinum™ VLX

Máy phát hình Harris VHF Platinum™ VLX

Model

: Platinum™ VLX

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: Máy phát hình Harris VHF Platinum™ VLX

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- The Platinum™ VLX VHF liquid-cooled transmitter 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 VLX’s flexible configurations and superior power density provide the critical features upon which broadcasters can build their network.

- The Platinum VLX incorporates the Harris®PowerSmart® solid-state architecture with 50 Volt LDMOS amplifier devices and the Harris Apex 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 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 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.

- 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 Harris Apex M2X exciter technology, allowing easy migration from analog to digital or between different standards

- All-digital linear and nonlinear pre-correction, including exclusive Harris 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

- Incorporates Harris® Web-enabled remote control graphical user interface

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)

Transmitter Dimensions

Refer to Harris outline drawing 8398464263

Transmitter Weight

Refer to Harris outline drawing 8398464263

 

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-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