HCDF-300W digita TV transmitter

Features
★Satisfy GY/T229.4-2008 Terrestrial digital television broadcast transmitters Specifications
★Used in all the latest generation of LDMOS High-power effect tube、Multiplex、mutual independence
★Embedded computer control system，Large-screen color LCD display，Touch Screen Control
★variety of protection functions, with over-current, over voltage, over-heat, over-VSWR and Lightning etc.
★Double-excitation configuration, Seamless automatic switching
★With excellent linear and nonlinear correction capability, Adaptive compensation.
★With MGC and ALC Function, To ensure the stability of the output level.
★Digital six-cavity band-pass filter,ensure that the transmitter-band target.
★Using centrifugal fan cooling, And with the wind node control circuit.

一、 SPECIFICATIONS

Spectral mask：Band spectral characteristics of satisfy GB20600 Relevant provisions of the National standard

Shoulder belt over （Center Frequency±4.2MHz)：<-37dB （Before Filter）

<-39dB （After filter ）

In-band Non-flatness:: within ± 0.5dB（fc±3.591MHz）

MER：≥32 dB

Exrta-band stray: (in channels): ≤-45 dB(Relative to the in-band transmission power) and ≤13mW

Exrta-band stray: (in channels): ≤-60dB(Relative to the in-band transmission power) and ≤13mW

PAPR: satisfy the CCDF curve of the template demands

The machine phase noise: 10Hz<-60dBc/H

100Hz<-75dBc/H

1KHz：-85 dBc/Hz

10KHz：-95 dBc/Hz

100KHz：-110 dBc/Hz

1MHz<-115

Output power stability: ±0.5dB

RF effective bandwidth: 7.56MHz

二、The output load return loss:

Work: ≥26 dB

Allowed to work: ≥20 dB

三、general requirements

★ Satisfy GY/T229.4-2008 Terrestrial digital television broadcast transmitters Technical Requirements

★ Frequency band：UHF TV channels

★ Bandwidth：8MHz

★ Frequency stability：Using internal reference source≤1X10^-7

^{Using external reference source}≤1X10^-10

★ Frequency adjustment step：1Hz

★ Computer remote control interface：RS485 and RJ45

★ Single Frequency Network mode frequency adjustment step-size: 1Hz

一、General technical requirements

Mains Power Supply

Voltage: AC380V±10%（four wire three phase）；or 198V～242V (Two-phase)

Power Frequency: 50±1Hz

Power capacity: about 7KW

Ambient temperature range: -5℃～50℃

Relative temperature: <95% non condensing

Atmospheric pressure: 86KPa～106Kpa

Satesfly the national standard or the line marked on the electromagnetic compatibility standards

Related "Digital TV transmitter" products: HCDF-100W digita TV transmitter; HCDF-1KW digita TV transmitter