Automatic Video Switch - 2x1 - BNC

  • Automatic Switchover to a Secondary Video Source
  • Loss of Video Detection
  • Dry-Contact Relay Output
  • Detection of NTSC or PAL Signals
  • Operation from AC or DC Power
  • Recommended Power Supply ( Not Included )
    PS-24AS (USA)PS-24AX (International)


    The TX-AVX is the ideal choice in installations where automatic switchover to an alternate video source is needed when the primary signal is lost. The unique power supply input allows the TX-AVX to be powered from a wide variety of existing ac or dc power sources.

    The TX-AVX has two video inputs and a single output. The detection circuit bridges the INPUT line. When a valid NTSC or PAL video signal is detected, the INPUT jack is connected to the OUTPUT jack. The output is designed to connect to a 75 Ω terminated load. In the absence of video input at the INPUT jack, the AUX INPUT jack is connected to the OUTPUT jack. The switching is accomplished by means of a high-quality RF relay. If power to the TX-AVX is interrupted, then the AUX INPUT jack is connected to the OUTPUT jack. The INPUT jack is 75 Ω terminated. The AUX INPUT is terminated when it is connected to the OUTPUT and is unterminated when it is not in use.

    Video detection is based on valid sync signals. The TX-AVX responds to valid NTSC or PAL sync while ignoring 50 Hz and 60 Hz hum and related induction artifacts. The TX-AVX is able to detect signals as weak as 0.5 V p-p. When a valid signal is detected, the relay connects the INPUT to the OUTPUT, and provides a ground connection to the SLAVE terminal, permitting the module to be connected as a video-present detector. Use in conjunction with RDL® BZR Alert Modules for convenient and reliable notification of status change.


    Inputs:BNC, Ground-referenced
    Input Level:0.5 V p-p video to 1 V p-p video
    Output:BNC, Ground-referenced (Output must be terminated with 75 Ω load)
    Slave Output:Switches to ground on valid input signal
    Relay Contacts:Single-Pole/Single-Throw
    Maximum Switching Power:60 W (220 Vdc, 125 Vac, 2A)
    Ambient Operating Environment:0° C to 55° C
    Power Requirement:GROUND-REFERENCED, 12 to 33 Vdc or 12 to 24 Vac @ 100 mA
    Package Type:Cardboard Box
    Package Dimensions:2 x 2 x 4 in.
    Shipping Weight:0.31 lbs.
    WEEE weight:0.255 lbs.
    Tariff code:8543.70.9860

    Related Products

    Switching & Control
    • ST-RX2

      Audio Routing Switcher - 1x2

    • ST-SSR1

      Line-Level Audio Switch - 2x1

    Related Products

    General Mounting Accessories
    • MB-2

      Mounting Kit - RU and TX Series

    • SR-4

      STICK-ON Series Mounting Rack - 7 modules

    • MB-1

      Mounting Kit - RU, ST and TX Series

    • MB-3

      Kit to Mount ST, TX Series Modules on FP Panel

    TX™ Mounting Accessories
    • TX-HRA3

      10.4" Rack Mount for 3 TX Series Products

    • TX-RRB1

      Rear rack rail mounting kit for any TX series module

    • TX-RA5

      TX Series 19" Racking System - 5 modules 1RU

    • MB-1

      Mounting Kit - RU, ST and TX Series

    • DRA-35T

      TX Series DIN Rail Adapter

    Pole Mounting Accessories
    • RC-HPS1

      10.4" Rack Mount for Desktop Power Supply and TX Module

    DIN Rail Mounting Accessories




    CAD FilesUnitsSizeFormat
    Engineering Functional BlockAmerican4 KBDXF
    Panel Diagram - FrontAmerican3.76 KBDXF
    Panel Diagram - FrontMetric10.06 KBDXF
    High Res ImagesFormat
    Declaration of Conformity


    How To Buy

    Direct Dealer Program

    Becoming an RDL direct dealer is quick and easy. To become a direct dealer, your company must meet the following requirements:

    • Must be an A/V contractor, sound contractor or system integrator
    • Must possess a current resale certificate for your state
    Click here to submit a new direct dealer account inquiry

    Buy Online