Digital Recorders





Nitek EX1120 Video Link System Selectable 1000ft. to 12000ft.



Live video transmission system for operation over
twisted pair, Cat 5, Cat 6 or Cat 7 cables.

The EX1120 is a complete Twisted Pair Video system made up of a TR1120 receiver unit and a TT1120 transmitter unit. The system is designed to operate over Category 2, 3, 4, 5, 6 or 7 twisted pair cable. It works well over existing communication, computer network spare pairs, or new cable installations. A highly balanced transmitter output assures that the system will not interfere with other network equipment. Advanced receiver and transmitter electronics provide optimum video quality and complete immunity from ground loop, hum and noise. Both the transmitter and receiver provide adjustment for gain and frequency compensation allowing the system to be €œfinetuned€ for the cable. These unique adjustments provide optimum performance over the entire operating range of the system and allow cable lengths to be estimated with a wide safety margin. The receiver and transmitter units each require 24 VAC power. In multiple receiver and/or transmitter applications a common supply can be used for the


  • Active electronics compensate for frequency and
    level loss providing the highest quality video
  • High resolution color or monochrome video
  • Immunity to ground loop. Video and AC can be run in a
    common raceway, where code allows
  • Built-in protection from power surges, transients,
    static or other electrical interference
  • Video can be run in the same cable with telephone
    and computer signals
  • Weather resistant design
  • Easy to install

Receiver Unit

Size 1.6€(4.1cm)H x 4.30€(11cm)W x
Power Requirements 24VAC@1watt (1VA)
Input Balanced low voltage current loop
Output 1 vpp composite video
Monochrome or Color
Common Mode Rejection >70dB
Shipping Weight 3 lbs


Transmitter Unit

Size 1.6€(4.1cm)H x 4.30€(11cm)W x
Power Requirements 24VAC@1watt (1VA)
Input 1 vpp composite video
Monochrome or Color
Output Balanced low voltage current loop
Common Mode Rejection >70dB


  • Large Campus Installations
  • Shopping Malls
  • Airports
  • High Voltage Facilities
  • Traffic Around City Areas
  • Remote Gates
Wire Spec
26 to 12 AWG Unshielded
Twisted Pair (UTP)
DC Loop Resistance
51 Ohms/1,000 ft (max)
Normal Capacitance
100 Ohms +/- 20%
UTP Category
2 or better


Wire and Cable Recommendations

Twisted Sender systems are recommended for use with unshielded twisted pair (UTP) wiring. The systems will operate over wire gauges from 26 AWG through 12 AWG but are optimized for 24 AWG. Category 2, 3, 4, 5, 6 or 7 cable may be used. Individually shielded pairs should be avoided, as they drastically reduce the operating range of the systems. Multi-pair cable (>15 pairs) with an overall shield is acceptable. Video can be operated in the same communication cable co-existent with telephone, computer, control signals, power voltages and other video signals. While video may be routed through telephone punch down block terminals, any bridge-taps, also called Ttaps and any resistive, capacitive or inductive devices MUST BE removed from the pair.


Video Format RS170, NTSC, PAL, SECAM,
CCIR (Color or B/W)
Video Input 1 vpp composite video
monochrome or color
Operating Frequency 1 Hz to 10 MHz
UTP Category Unshielded Category 2 or better
Temperature Range -40 degrees C to +85 degrees C