RF-Transmissions Systems - A2D Solutions : Screen TV Transmitters Exciters : 5 kW TV TRANSMITTERS AND TRANSPOSERS

[RF-Transmissions Systems - A2D Solutions]

5 kW TV TRANSMITTERS AND TRANSPOSERS

TV TRANSMITTERS AND TRANSPOSERS

Screen 5 kW TV TRANSMITTERS AND TRANSPOSERS

MAIN FEATURES:
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Modular construction.
Conventional and forced-air cooling.
AGC and ALC controls.
3-slope linearity precorrection.
Excellent noise figure.
LDMOS technology in the UHF versions.
Digital ready.
Programming of local oscillator from front panel.
Pre-set for precision OFFSET.
Multifunction digital display.
Soft-start circuit.
Low power consumption.
Economy circuit in case of input signal lack.
SAW vestigial filter.
Sync restore (SCT).
Group delay precorrection (SCT).
Automatic white level and sync limiter (SCT).
Multistandard modulator (SCT).
ICPM and differential phase precorrector
option available.
Available in stereo/dual sound version.

SCT 512UB 5kW UHF TRANSMITTER
WITH PRECISION OFFSET OPTION
(SINGLE RACK VERSION)

The television transmitters in this seriesare available in different versions for the VHF I, VHF III and UHFfrequency bands and in different configurations that permit theirinstallation and operation in
sites with different characteristics and environmental conditions.

SCT 512UB 5kW UHF TRANSMITTER
WITH PRECISION OFFSET OPTION
(SEPARATE AMPLIFICATION VERSION)

The exciters used, which are available inthe various television standards and with a broad range of options, maybe single or double with automatic switch-over.

The final amplifier consists of distinctamplifiers operating autonomously and combined in such a way as toguarantee full redundancy of the stages. Eachindividual amplifier is, in turn, internally redundant and poweredindependently in order to ensure high reliability and practicality inmaintenance operations.

Microprocessor circuits carry outcontinuous control checks and provide for the visualization of all theoperating parameters of the equipment on an LCD display as well astransmitting them to the rear-mounted connectors for remote interfacing.

By replacing the analogue exciter with anequivalent DBT series exciter, the same unit can be used for thetransmission of digital signals subject to only an extremely limitedde-rating thanks to the high degree of linearity and to the oversizingof the amplifiers.
The great efficiency of the power supply circuits guarantees low powerconsumption and a high degree of MTBF.

MODEL-SPECIFIC DATA
Model	Output band	Dimensions	Analog output power p.p.		Digital output power (DVB-T) without filter (Shoulders -36 dB @ Fo ± 4.3 MHz)
SCT,SCR, DBT *			Nominal	Max.
502FB 502TB 512TB 502UB 512UB	VHFI VHF III VHF III UHF UHF	2x 44 U 2 x 44 U 2 x 36 U 2 x 44 U 1 x 44 U or 2 x 36 U	5kW 5 kW 5 kW 5 kW 5 kW	6kW 6 kW 6 kW 7 kW 7 kW	- 1600 W 1600 W 1600 W 1600 W
* SCT Series = analog transmitters SCR Series = transposers DBT Series = digital transmitters

Specifications and characteristics aresubject to change without notice.

5 kW TV TRANSMITTERS ANDTRANSPOSERS

TECHNICALCHARACTERISTICS
TRANSMITTER VERSION
VIDEO PARAMETERS
Input impedance Input level White / Sync level limiter 2T K factor Amplitude / frequency response Differential gain Differential phase Group delay Sync pulse compression S/N ratio (weighted) Pre-emphasis ICPM Luminance non linearity Field time bar tilt Line time bar tilt	75 Ohm 1 V p.p. ±3 dB 95% < 1.5% ±0.5 dB (throughout the vision band) < 5% < 3° ±35 ns (throughout the vision band) < 3% > 60 dB 50 µs or 75 µs or flat < 3° < 4% < 2% < 2%
AUDIO PARAMETERS
Input impedance (balanced) Input level Frequency response (30 Hz to 15 kHz) T.H.D. (30 Hz to 15 kHz) S/N ratio (un-weighted) Stereo / Dual sound option	600 Ohm or > 5 kOhm, selectable 0 dBm ±6 dB ±0.4 dB < 0.4% > 60 dB Available
TRANSPOSERVERSION
Input frequency bands Input impedance Input matching Input level amplitude A.G.C. + A.L.C. dynamic Noise figure	VHF I, VHF III, UHF 50 Ohm > 26 dB -30 to -75 dBm > 45 dB < 8 dB
GENERAL
Available standards Cooling Operating temperature Maximum relative humidity Mains power supply External reference frequency input Protections Output connector Output impedance Working class Frequency stability I.M.D. at rated output power Harmonics Spurious emissions External interfaces	B, D, G, H, I, K, M, N Forced air cooling -10°C to +45°C 90%, non condensing 230/400 V AC ±15% 3 phases 5 MHz or 10 MHz Overpower SWR Overvoltage Overcurrent Overtemperature 1+5/8” EIA 50 Ohm AB 1 ppm better than -57 dBc (-60 dBc typical) - 60 dB or better - 60 dB or better logic and analog signal outputs, enable input, RS 485

Specifications and characteristics are subject tochange without notice.

5 kW TV TRANSMITTERS AND TRANSPOSERS TV TRANSMITTERS AND TRANSPOSERS
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5 kW TV TRANSMITTERS AND TRANSPOSERS