RF-Transmissions Systems - A2D Solutions : Screen TV Transmitters Exciters : AUTOMATIC CHANGE-OVER UNIT

[RF-Transmissions Systems - A2D Solutions]

AUTOMATIC CHANGE-OVER UNIT

Screen AUTOMATIC CHANGE-OVERUNIT
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The SCS 700 model is a universal automaticswitching unit that controls and manages television transmitters ormicrowave links of any type.
It allows analysis of video, audio, IF or RF signalsand, in the case of a breakdown of the primary signal, operates thesubsequent switch-over to the auxiliary source, thus ensuringcontinuity of service.

The internal coaxial relay allowsswitch-over of RF signals of up to 300 W p.s. and up to 12 GHz.
By means of the special connector located on the back of the unit, itcan interface with any type of external coaxial relay to controlhigh-power or high-frequency installations.

The unit, which is 100%microprocessor-controlled, permits the software-operated configurationof all threshold levels directly from the front panel.
The practical multifunction display makes it possible to check theparameter settings and the operational status of the system.
Automatic operation can be deactivated from the front panel in order toallow manual control of
switching.

AUTOMATIC CHANGE-OVER UNIT

TECHNICAL CHARACTERISTICS
INPUTS
Video A (main), Video B (spare) Audio 1 A (main), Audio 1 B (spare), Audio 2 A (main), Audio 2 B (spare) RF sampling A (main), RF sampling B (spare) Coaxial relays RF A (main), RF B (spare)	BNC, 75 Ohm Mini XLR, 600 Ohm BNC, 50 Ohm N or SMA, 50 Ohm
OUTPUTS
Video Audio 1, Audio 2 RF (coaxial relay)	BNC, 75 Ohm Mini XLR, 600 Ohm N or SMA, 50 Ohm
INTERFACES
ScreenService Broadcasting Technologies's equipment Unit A (main) and Unit B (spare) Universal Auxiliary coaxial switch Serial	25 pinsub-D connector 15 pin sub-D connector 9 pin sub-D connector (DCE)
VIDEO
Gain flatness Off isolation Differential gain Differential phase Return loss	0.1 dB > 80 dB 0.01% 0.01° > 30 dB
AUDIO
Frequency response Off isolation Crosstalk between channels	0 to 1 MHz > 70 dB better then -90 dB
R.F. SAMPLING
Input sensitivity	-30 dBm nominal±20 dB
INTERNAL COAXIALSWITCH
Operating frequency Maximum power Impedance Insertion loss Return loss Isolation between channels	Up to 12 GHz Up to 300 W p.s. 50 Ohm < 0.2 dB > 30 dB @ 1 GHz > 70 dB @ 1 GHz
GENERAL
Operating temperature Maximum relative humidity Main supply Dimensions	-10°C to +45°C 90%, non condensing 115 / 230 V A.C. ± 20% 1 U 19" rackmount

Video and audiochange-over can be internally set as video and audio distributor Specifications and characteristics are subject to change without notice.

AUTOMATIC CHANGE-OVER UNIT AUTOMATIC CHANGE-OVER UNIT
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AUTOMATIC CHANGE-OVER UNIT