Product Overview
GOSPELL’s GT-5900-OD is an outdoor UHF Digital Terrestrial Television (DTT) transmitter, and is designed for small areas coverage and (or) gap filling application in DTT network. GT-5900-OD has combined many design concepts from our rich experience in terrestrial television broadcasting, bringing service providers a network which has superior efficiency, stability and reliability. These models support various modulation standards of digital terrestrial television, such as DVB-T/H, DVB-T2, DTMB, ATSC, ISDB-T/Tb, also it can operate in SFN mode enabling less frequency resource is used.
GT-5900-OD adopts advanced LDMOS amplifiers and has a compact structure that enables the broadcaster or network operator to have reduced site acquisition and energy cost in their DTT network. In order to minimize the attenuation of RF output power in the feeder cable, the unit can be fixed on top of the tower of the base station by a pole mounted kit that can greatly shorten the length of the feeder cable between the transmitter and the transmitting antenna. GT-5900-OD series has an aluminum alloy housing, compact size and a high protection level that can protect the electronics from heat emissions and weather. Various other forms of protection are taken into account, such as over excitation, over-current, over-temperature, lighting-proof and VSWR protections.
GT-5900-OD series supports Web/SNMP based management and maintenance for remote status monitoring and controls, this can significantly reduce management time and operating expense (OPEX). By incorporating the latest technologies of RF delay, echo cancellation, frequency shift and co-channel interference rejection, this unit can fulfill the needs for DTT coverage of SD and HD digital television programs. This is especially suitable for small-scale coverage areas with complex terrains.
Block Diagram
Diagram 1 1/2W UHF Transmitter
Diagram 2 5/10/20/30/50WUHF Transmitter
Diagram 3 100/200/300W UHF Transmitter
Technical Specifications
Outdoor UHF Transmitter Family | Product Picture | 
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Ordering Codes | GT-5900-1D | GT-5900-2D | GT-5900 -5D | GT-5900 -10D | GT-5900 -20D | GT-5900 -30D |
Output Power(RMS)(after filter)* | 1W | 2W | 5W | 10W | 20W | 30W |
Dimensions(W x H x D) | 220mm x 320mm x 105mm (8.7’’ x 12.6’’ x 4.1’’) | 355mm x 460mm x 165mm (14.0’’ x 18.1’’ x 6.5’’) |
Weight | 3kg | 15kg |
Cooling Method | Passive Cooling | Passive Cooling |
Enclosure Protection | IP65(6 sides), Weather-Proof design | IP65(6 sides), Weather-Proof design |
Operating Temperature | -20 to 55°C | -20 to 55°C |
Product Picture | 
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Ordering Codes | GT-5900-50D | GT-5900-100D |
Output Power(RMS)(after filter)* | 50W | 100W |
Dimensions(W x H x D) | 408mm x 568mm x 210mm (16.1’’ x 22.4’’ x 8.3’’) | 485mm x 694mm x 305mm (19.1’’ x 27.3’’ x 12.0’’) |
Weight | 40kg | 43kg |
Cooling Method | Passive Cooling | Active Cooling |
Enclosure Protection | IP65(6 sides), Weather-Proof design | IP65(5 sides), Weather-Proof design |
Operating Temperature | -20 to 50°C | -20 to 50°C |
Product Picture | 
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Ordering Codes | GT-5900-200D | GT-5900-300D |
Output Power(RMS) (after filter) * | 200W | 300W |
Dimensions(W x H x D) | 585mm x 794mm x 330mm (23.0’’ x 31.3’’ x 13.0’’) |
Weight | 53kg | 60kg |
Cooling Method | Active Cooling |
Enclosure Protection | IP65(5 sides), Weather-Proof design |
Operating Temperature | -20 to 50°C | -20 to 50°C |
Notes: * The above output powers are calculated per ATSC/ DTMB standards under single band mode. |
General
Parameters | Frequency Range | 470 to 860M |
Supported Standards | DVB-T,DVB-T2,DVB-H,DTMB,ATSC,ISDB-T/Tb |
Exciter/Modulator (Optional) ** | Optional Indoor DVB-T2 or DTMB modulator/exciter(1U) |
Bandpass Filter | Built-in Bandpass Filter(Optional Single channel or broadband) |
Transmitting Mode | Single Channel or Broadband |
Network Mode | SFN/MFN |
Notes: ** Please contact our sales representative for the other exciter/modulator requirements. |
Electrical | Frequency Stability(Exciter) | ≤ ±1 x 10-7(Internal reference) ≤ ±1 x 10-10 (External 10MHz reference clock) |
Frequency Accuracy(Exciter) | MFN: ±100Hz, SFN: ±1Hz |
MER(Exciter) | ≥ 33 dB |
Input Signal Level | 85dBμv |
Frequency Accuracy | MFN: ≤ ±100Hz, SFN: ≤ ±1Hz |
Shoulder of Signal @fc±4.2MHz | ≤ -36dB |
In-band non-flatness@fc±3.591MHz | ≤ ±0.5dB |
AGC Power Control Range | ±8dB |
Stability of Output Power | ≤ ±0.5dB |
Output Echo Loss | ≥ 26dB |
I/O Interface | UHF Input | Electrical Option | 1 x N Type, 50Ω |
Optical Fiber Option | 1 x Optical Fiber (Rx) Input, single mode, 1310nm and 1550 nm |
UHF Output | 1 x N Type, 50Ω (1-100W) 1 x L27, 50Ω (200-300W) |
RF Test Port | 1 x SMA, female, 50Ω |
Data Monitoring Port | 1 x Data Port (be used to connect to the Gospell’s indoor or outdoor monitoring unit) |
Power Supply and Environmental | Power Supply | AC Input | 180V to 240V AC (50Hz±2%) Input(1-300W) |
DC Input | Optional DC -48V Input(Available for 1-50W) |
Storage Temperature | -40 to 80°C |
Operating Humidity | 0 to 95%, non-condensing |
Typical Application
Scenario 1 Remote Coverage
Station Scenario 2 SFN Gap Filler