High Power Air Cooled Terrestrial Digital TV Transmitter UHF / MMDS System

GT-5900

High Power Air Cooled UHF Terrestrial DTV Transmitter

Power range : 10W-3000W

UHF/MMDS System 

Indoor / Outdoor type optional 

Product overview

Gospell’s GT-5900-3000 is a high power air-cooled UHF terrestrial DTV transmitter which combines up to eight power amplifier modules with a maximum 3000W of output power. It has superior performance and enhanced efficiency by adopting a series of technologies. It can work in any frequency within the UHF span, and the transmitting bandwidth is up to 80MHz.

This series of products has an optimized design in forced air cooling and architecture, with lower noise, higher efficiency and outstanding anti-interference performance; GT-5900-3000 series can support a wide range of Digital Terrestrial Television (DTT) standards, such as DVB-T, ATSC, DTMB, ISDB-T_b and even the latest DVB-T2 standards.

By incorporating our latest technologies of linear and non-linear digital adaptive pre-correction, RF delay and co-channel interference rejection, this system fulfills the needs of single band or broadband transmission in large-scale terrestrial coverage scenarios.

Main Features and Benefits:

High Performance

Supports up to 2500W of digital output power for DVB-T/DVB-T2/ISDB-T standard

Up to 3000W of digital output power for DTMB/ATSC standard

Optimized structure design, with lower noise, higher efficiency and outstanding anti-interference performance

High Flexibility and Stability

Modular design across the whole system, easy installation, maintenance and upgrade

Optional 1+1 redundant exciters and Preamplifiers

Multiple protection mechanisms are introduced for over-load, over-temperature, over-current and high VSWR

Large and dynamic Auto Gain Control (AGC) circuit ensures stability of output power

Improved power efficiency thanks to linear and non-linear Digital Adaptive Pre-correction

High Adaptability and Availability

Suitable for different contries and/or areas because multiple DTT standards are complied with, including DVB-T, DVB-T2, ATSC, DTMB and ISDB-T/T_b

Available in single and three phase power grid environments to meet different requirements of deployment

Wide range of working frequency from 470MHz to 860MHz

Lower CAPEX/OPEX

Improved ratio of cost to performance, lower CAPEX for operators

Low power consumption with high efficient LDMOS amplifiers to reduce electricity cost for operators

Reduced investment in manpower, benefits from convenient local monitoring and management through built-in touch screen display or remote monitoring via SNMP network management and/or telcom wireless network

User Friendly Monitoring Interface

Built-in color TFT LCD with touch screen in the front panel, supports monitoring & control of working states and any malfunction on any module without additional testing/monitoring equipment required, such as transmitting power, VSWR, working voltage/current, fan speed, IP address and so on.

Technical Specifications:

Items	Ordering Codes		GT-5900-2000	GT-5900-2500	GT-5900-3000
General Parameter	Output Power(RMS)*		2000W	2500W	3000W
	Number of PAs		6	8
	Number of Power Supplies		6	8
	Weight		450Kg(992 lbs)	500Kg (1102 lbs)
	Frequency Range(FIN)		470 to 860MHz
	Channel Bandwidth		6MHz, 8MHz
	Supported Standards		DVB-T2, DVB-T/H, DTMB, ATSC, ISDB-T/Tb
	Transmitting Mode		Single band or broadband(maximum 80MHz)
	Supported Network		MFN,SFN
	Cooling Method		Forced Air Cooling with top-mounted ventilation flue
	Dimensions (W x H x D)		1177mm x 1790mm(35U) x 1150mm (46’’ x 70.5’’ x 45’’)
	Notes: * The above output powers are calculated per ATSC/ DTMB standards under single band mode.
Main Components	Preamplifier		1 x Preamplifier module(3U), optional 1 + 1 redundant configuration
	Exciter (optional)**		1 x DVB-T2/DTMB Exciter (1U), optional 1 + 1 redundant configuration
	Preamplifier Switchover Unit		2U, Optional
	Exciter Switchover Unit		1U, Optional
	Power Splitter and Combiner		Built-in
	Monitoring and Control Unit		1 x Monitoring control unit(2U), 1 x 7” LCD touch screen
	Bandpass Filter		Optional Single band or broadband Bandpass filter
	Notes: ** Please contact our sales representative for the other exciter/modulator requirements.
Environmental	Operating Temperature		0 to 45°C
	Operating Humidity		0 to 95%, non-condensing
Power Supply	AC Input	Three-Phase Option	4 wires (3-phase + neutral), 342-418V AC, 50Hz±5%
		Single-Phase Option	2 wires, 190-250V AC, 50Hz±5%
	Surge Protection		Built-in AC Surge Protector
I/O Interface	TS Input		DVB-ASI (BNC female, 75Ω) (Exciter)
	MPEG-TS over IP		100/1000Base-T, RJ-45 (Exciter option)
	RF Output		EIA 1-5/8’’ or EIA 3-1/8’’ flange
	1PPS Clock Input		BNC, female, 50Ω(Exciter)
	10MHz Clock Input		BNC, female, 50Ω(Exciter)
	RF Monitor Output		SMA, female, 50Ω
Monitoring & Control	Local Monitoring & Control		TFT LCD touch screen
	Network Management Interface		10/100 Base-T Ethernet, 1 x RJ-45, Supporting Web-browser or SNMP network management
Electric Performance	Frequency Stability		≤ ±1 x 10-7(Internal reference) ≤ ±1 x 10-10 (External 10MHz reference clock)
	Frequency Accuracy		MFN: ≤ ±100Hz, SFN: ≤±1Hz
	MER		≥33 dB
	Shoulder of Signal @fc±4.2MHz		≤ -36dB
	In-band non-flatness@fc±3.591MHz		≤ ±0.5dB
	AGC Power Control Range (∆ GAGC)		±8dB
	Stability of Output Power (∆ POUT)		≤ ±0.5dB