Vidatronic TVT-20 Manuals

2800-00009 1 Twisted pair video transmitter TVT-20 and video receiver TVR-20 Installation instruction and product specifications PREFACE The video transmitter TVT-20 and receiver TVR-20 is our middle to long distance transmission set. They are self- contained with power supply for 230VAC mains supply. The series perform easy installation and transmission of black & white and colour signals through CAT5E twisted pair cable, as well as standard 0.6mm UTP cable. The product series is been developed based upon the idea – “to establish a very good transmission quality for an acceptable price”. TVT-20 Video output amplitude is selectable by means of a jumper (J4), performing from 2Vpp flat to 4Vpp with up to 9dB pre- emphasis @ 5MHz. The output impedance is =/< 110 Ohms +/- 20%, matching CAT5E and standard 0.6mm UTP. TVR-20 The receiver has galvanic separation. Line input impedance is selectable for CAT5E and standard 0.6mm UTP by means of a jumper (J4). The receiver is having only three adjustments, GAIN (RV1), SIGNAL (RV2) and LF (RV3). The output driver is of the “CF” type having a very effective dc-restoration, having great importance for colour signals. Green LED (DS1) indicates when sync signal is present (flashing with 25 Hz). KEY FIGURES - Easy to install (mounting kit for wall mounting included) - Easy to adjust - Compact construction in a IP65 PC enclosure - Transmission distance up to max. 1.500 meters at CAT5E (1.700-1.800 meters at 0.6 UTP, ref. to the specifications). INSTALLATION (ref. to the figure at page 2) 1) Install the receiver on a flat surface (wall of wood, bricks or like) with the enclosed mounting kit. 2) Connect the twisted pair cable to J2 at the transmitter and to J1 at the receiver, by “colour-to-colour”. OBS: A possible shield at the cable may ONLY be connected to the receiver ground – not at the transmitter. 3) Connect the camera coax cable to J1 at the transmitter and the monitor or system cable to J2 at the receiver. Make sure to perform the connection in a secure way. 4) Connect the mains cable by Green/Yellow to Earth, Blue to “N” and Brown to “L”. The power cable must be connected to the mains power through a two pole mains switch. The earth wire must be connected to a ground connection in a secure way in order to maintain the EMI/EMC safety for the products. 5) Set the jumper J4 at the transmitter to the position adequate for the distance which has to be transmitted. Guideline when using CAT5E cable; 1) At distances up to about 500 meter, leave the jumper OPEN. 2) At distance up to 1.000 meter, set the jumper in position “1-2”. (3Vpp + pre-emphasis) 3) At bad cable installations or distances above 1.000 meter (above the data limit) set the jumper in position “2-3” (4Vpp + pre-emphasis) 6) With a signal pattern generator connected to the transmitter, adjust RV1 (Gain), RV2 (Signal) and RV3 (LF) at the receiver until you have a clean picture with the right colour balance and contrast. Fine adjust eventually the signal output amplitude from the receiver by means of RV1. 7) Replace the pattern generator with the actual camera for that position and eventually perform a fine adjust. NOTE: Make sure that the cable glands have been tightened well and that all ¼ turns lock screws at the lid has been locked correctly in order to maintain the IP 65 grade.