• New LDMOS technology. Using the latest LDMOS technology and new PA module design, the RF amplifiers are extremely rugged and exhibit excellent thermal characteristics. Linearity and IMD performance are better than older bi-polar technology. This means an excellent transmission quality with analogue or digital operation.
  
• Digital upgradeable. Each LD's series transmitter is upgradeable for digital transmission. Optional kits are available for easy field digital upgrading. This reduces the cost of later upgrade to digital while providing the best quality of analogue service currently available
  

• Frequency-agile. LD series transmitters are fully broadband. All RF stages ahead of the output filters can operate on any UHF channel, selectable via a digital selector.
  

• Modular assembly. Easy removable identical and interchangeable power amplifier modules and power supplies reduce spare requirement and service costs.
  

• On-air serviceability. Power supplies and power amplifier modules can be safely removed during operation, for on-air maintenance. Failure or module removal keep always transmitter on-air.
  

• High redundancy. High on-air reliability is assured by using multiple power amplifier modules, each comprised of six individual PA's, with independent power supplies and optional dual exciters.
  

• Low maintenance. The overall operating costs are reduced and the maintenance is optimised for two year intervals thanks to the absence of wear-out mechanism in solid state devices.
  

• Power supply.. A rugged, high-efficiency (> 93%) power supply support each PA module and can be on-air removed and replaced. Power supplies are protected from incoming AC line overvoltage, overcurrent, transient and lightning. 
  

• Advanced controller provides full front panel transmitter control capabilities and extensive metering of individual modules. Standard or special remote control interface is also available.
  

• Cooling. An oversized standard air cooling system with internal fans extends transistors life. In the standard version, air enters trough removable filters in the front panel of each PA and power supply module. Air is exhausted from the rear of cabinet or from the top (optional). A special version is also available when it is necessary to separate transmitter cooling air from building air.
  

• Meets or exceeds all international standards for safety and electrical requirements.
  
  

Technical Characteristics 


Electrical characteristics:

Frequency Range 470-860 MHz 
Bandwidth Broadband

Output power:
Mod. TTU 280 LD 280 Wps 
Mod. TTU 500 LD 550 Wps 
Mod. TTU 1000 LD 1050 Wps 
Mod. TTU 1500 LD 1600 Wps 
Mod. TTU 2000 LD 2200 Wps 
Mod. TTU 3000 LD 3000 Wps 
Mod. TTU 4000 LD 4200 Wps 
Mod. TTU 5000 LD 5500 Wps 
Mod. TTU 10000 LD 10.5 kWps 
Mod. TTU 20000 LD 20 kWps 

Power Consumption (at maximum power):
Mod. TTU 280 LD 660 VA 
Mod. TTU 500 LD 1240 VA 
Mod. TTU 1000 LD 2400 VA 
Mod. TTU 1500 LD 3580 VA 
Mod. TTU 2000 LD 4880 VA 
Mod. TTU 3000 LD 7030 VA 
Mod. TTU 4000 LD 9340 VA 
Mod. TTU 5000 LD 11880 kVA 
Mod. TTU 10000 LD 23640 kVA 
Mod. TTU 20000 LD 46800 kVA 

In-out impedance 50 W 
Input connector N 

Output connector:
Mod. TTU 280 LD - TTU 500 LD N (others on request) 
Mod. TTU 1000 LD - TTU 1500 LD DIN 7/16" (others on request) 
Mod. TTU 2000 LD - TTU 3000 LD EIA 7/8" (others on request) 
Mod. TTU 5000 LD EIA 1+5/8" (others on request) 
Mod. TTU 10000 LD - TTU 12000 LD TTU 20000 LD EIA 3+1/8" (others on request) 

Input power (all models) < 5 Wps 
Spurious and harmonic suppression (ref. to carrier) < - 60 dBc
Power stability < 1%
Intermodulation (ITTU-DIN 45004 -8, -16, -10 dB) < -60 dBc (typ. - 62 dBc) 
Video characteristics:
Input connector BNC unbalanced 
Input impedance 75 W 
Input signal level 1 Vp.p. 
Input return loss >30 dB 
Differential gain [ ± 0.5 % 
Differential phase [ ± 1° 
Amplitude frequency response (in the vision band) [ ± 0.5 dB 
Group delay frequency response (in the vision band) [ ± 20 nS 
S/N ratio > 65 dB 
2T K factor [ 1 % 
Luminance non linearity [ 0.5 % 
Audio Characteristics:
Input connector XLR balanced 
Input impedance 600 W 
THD (50 KHz peak deviation at 1 KHz) [ 0.4 % 
S/N (50 KHz peak deviation at 1 KHz) >65 dB 
Deviation from preemphasis curve (20 Hz to 15 KHz) ± 0.5 dB 
Metering:
Forward and reflected power, DC voltages and currents
Alarms:
VSWR, over temperature, vision signal missing, cooling system failure, overdriving;
Power supply:
Operating voltage 115/230/240 Vac ±10%, 47 to 62 Hz single phase or 208/220/380 Vac ±10%, 47 to 62 Hz three phases




Operating conditions:

Cooling forced air with fans 
Operating temperature -5° ÷ +45° C 
Humidity 95% max 
Weight :
TTU 280 LD 88 kg
TTU 500 LD 102 kg
TTU 1000 LD 112 kg
TTU 1500 LD 115 kg
TTU 2000 LD 226 kg
TTU 3000 LD 265 kg
TTU 4000 LD 359 kg
TTU 5000 LD 421 kg
TTU 10000 LD 835 kg
TTU 20000 LD 1724 kg
Size (WxHxD):
TTU 280 LD 540 x 685 x 720 mm
TTU 500 LD 540 x 685 x 720 mm
TTU 1000 LD 540 x 685 x 720 mm
TTU 1500 LD 540 x 685 x 720 mm
TTU 2000 LD 627 x 1200 x 800 mm
TTU 3000 LD 627 x 1200 x 800 mm
TTU 4000 LD 627 x 1690 x 950 mm
TTU 5000 LD 627 x 1690 x 950 mm
TTU 10000 LD 1254 x 1690 x 950 mm (2 cabinets)
TTU 20000 LD 2508 x 1690 x 950 mm (4 cabinets)
Features and specifications subject to change without notice.