IRT
Communications
www.irtcommunications.com
Page 1: ...ia National Phone 021 439 3744 Fax 02 439 7439 International 61 2 439 3744 61 2 439 7439 VA 100NC VIDEO DISTRIBUTION AMPLIFIER Telecom Serial 347 Item 55 802995 21 10 1991 DESIGNED AND MANUFACTURED IN...
Page 2: ...NING OPERATION OF ELECTRONIC EQUIPMENT INVOLVES THE USE OF VOLTAGES AND CURRENTS WHICH MAY BE DANGEROUS TO HUMAN LIFE OPERATING PERSONNEL SHOULD OBSERVE ALL SAFETY REGULATIONS DO NOT CHANGE COMPONENTS...
Page 3: ...le equalization is provided for up to 300 metres of 75 ohm video cable Front panel controls allow the video gain to be varied by a minimum of 3dB and the cable equalisation to be independently set to...
Page 4: ...a module to be operated in position and provide access to all circuit boards transistors and internal adjustments RB 1N Rear Assembly An additional rear assembly may be purchased to permit bench test...
Page 5: ...n accordance with Telecom Australia Spec 1002 Bridging loop input with return loss 40dB to 6MHZ 1 6 5 6 40dB 2V p p OdB gain 3dB O ldB to 10MHz 0 2dB to 20MHz bandwidth exceeds 30MHz 0 5 at 4 43MHz o...
Page 6: ...nd noise and then applied to a sample switch This switch under control of the sample pulse stores in a sample and hold capacitor the back porch error signal If LK1 is in the On position this error is...
Page 7: ...ld be set up in the position in which it is intended to be operated Adjustments can then be made using the intended lengths of cable and with all outputs terminated as they would be in service The cab...
Page 8: ...should illuminate If clamping is not required LK1 should be in the Clamp Off position 802995 8 I R T C o m m u n i c a t i o n s w w w i r t c o m m u n i c a t i o n s c o m...
Page 9: ...factory set and should not be adjusted unless a component has been changed They are not operational1 controls Before adjusting any of these controls allow time for the VA 600 to reach temperature stab...
Page 10: ...15 0 98 1 65 12 16 0 68 0 12 U 1 2 3 4 5 6 7 8 3 0 0 0 12 11 9 0 5 12 0 14 4 11 94 0 0 12 11 65 0 12 11 94 5 15 0 12 6 0 15 12 All voltages measured with a high input impedance multimeter under condit...
Page 11: ...z m ni 8 Ul 0 fl pi O O 1 H B 3HSSI 1VNIOIWO I R T C o m m u n i c a t i o n s w w w i r t c o m m u n i c a t i o n s c o m...
Page 12: ...I I SAMPLE SWITCH IV P P TERMINATED 6 OUTPUTS 6V INPUT DC DC CONVERTER I5V ISV 1 1 T l i V I POWER IRT DftAWN 3 AA Q TE IXI SCALC V A l O O NC BLOCK DIACKAM 8OZ9S5 SHEET 2 or 3 I R T C o m m u n i c...
Page 13: ...p T R65 l l 1 12K 2 C21 C22 60p 22p i 1 9 g 2 COPYRIGHT DO NOT COPY NOR DISCLOSE TO ANY THIRD PARTY WITHOUT WRITTEN CONSENT DRAWN K N CHECKED ENO APP CONTRACT No DLEU SIZE SCALE TITLE VA IOONC CABLE C...
Page 14: ...ORIGINAL ISSUE DATE IT 3 84 I I l l Is a H CD O P o o o o o o o o o o o o in 0 6 0 o I R T C o m m u n i c a t i o n s w w w i r t c o m m u n i c a t i o n s c o m...
Page 15: ...ETAL FILM 25W 5 RESISTOR METAL FILM 25W 5 RESISTOR METAL FILM 25W 5 RESISTOR METAL FILM 25W 5 RESISTOR METAL FILM 25W 5 RESISTOR METAL FILM 25W 5 RESISTOR METAL FILM 25W 5 RESISTOR METAL FILM 25W 5 RE...
Page 16: ...CERAMIC 47pF CAPACITOR CERAMIC lOOpF CAPACITOR CERAMIC 120pF CAPACITOR CERAMIC 150pF CAPACITOR CERAMIC 390pF CAPACITOR CERAMIC 10nF CAPACITOR CERAMIC 22nF CAPACITOR CERAMIC 47nF CAPACITOR CERAMIC lOO...
Page 17: ...NP HF TRANS TO 18 PNP RF TRANS TO 18 PNP RF TRANS TO 39 NPN 1C REGULATOR 12V 1A 1C REGULATOR 12V 1A OPERATIONAL TRANSCOND AMP OP AMP BUFFER DC DC CONVERTER 48 2x15 INDUCTOR 4 7uH INDUCTOR lOuH INDUCTO...
Page 18: ...1700 14 16 SNU 0520 17 4 Description ESCUTCHEON 1C SOCKET 8 PIN OPEN FUSE HOLDER PCB FUSE 250mA LED HOLDER KNOB BLACK WITH LINE CAP BLACK WITH LINE CO AXIAL CABLE HANDLE S W COVER S W MODULE FRAME S W...
Page 19: ...0320 CAP SCREW 4BA Description CONNECTOR 24 PIN S CONNECTOR COAXIAL 1 5 6 TERMINAL BLOCK PCB I P LOOP COMP REAR PLATE RB lN CHASSIS REAR ASSY S W SIDE PLATE REAR ASSY SCREW ALLEN HEAD 4BA BLK Qty 1 8...
