Markertek - The Future of Broadcast Supply

Call 800-522-2025
M-F 8:30am - 7pm EST

Free Shipping Promo Box

FREE SHIPPING No Minimum Order!

SHOP MARKERTEK EVERYDAY for all of your needs. Free shipping on almost every order placed on our website.
Special order & oversized freight intensive items ship at an additional cost. Continental US orders only.
Ask about our new Economy International Shipping Options.

Secure LoginClose X

Returning Markertek Customers

New Markertek Customers

Why Create an Account?

Creating a Markertek account now will save you time on future orders. You'll have full access to your order history and a personalized shopping experience.

close - X

RDL TX-VCR Video Controlled Relay - BNC
    Questions? Ask a Markertek Expert:
    800-522-2025 Email

    RDL TX-VCR Video Controlled Relay - BNC

    Manufacturer: Radio Design Labs

    Item #: TX-VCR   •   MFG #: TX-VCR


    List Price:$191.75
    Our Price:$138.49

    free ship
    Availability: Usually ships in 3-10 business days
    This item is currently out of stock and will ship the minute we receive it – normally 3-10 business days. Need it sooner? Call 800-522-2025 and we'll make it happen,or email Customer Service for expedited delivery options. Certain Non-Stock Items Valued over $50.00 may Ship FREE UPS GROUND in the Continental US. Multiple quantities of the same non-Stock Item Valued below $50.00 may be ordered to meet the $50 minimum order requirement to qualify for Free UPS Ground Freight. This offer does not apply to certain freight-intensive or hazardous items. Certain restrictions may apply.



      Required Accessories

      The TX-VCR is the ideal choice in installations where a control signal is needed based on the absence or presence of valid video signals. The unique power supply input allows the TX-VCR to be powered from a wide variety of existing ac or dc power sources

      The TX-VCR has one video INPUT and a LOOP OUT video jack. The detection circuit bridges a 1V video line. The TX-VCR may be inserted in a video line with the loop-through video output feeding a terminated load. It may alternatively be installed at the end of a video line by installing a 75 Ohm terminator to the LOOP OUT video jack. The terminator is supplied with the TX-VCR.

      Video detection is based on valid sync signals. The TX-VCR responds to valid NTSC or PAL sync while ignoring 50 Hz and 60 Hz hum and related induction artifacts. The TX-VCR is able to detect signals as weak as 0.5 V p-p. When a valid signal is detected, the relay contacts close. Both a normally-open and normally-closed contact are provided, permitting the module to be connected as a video-present detector or as a video-loss detector. The front-panel SYNC LED lights when valid video is being detected.

      If a local or remote loss of video audible alert is needed, the TX-VCR may be wired to an RDL BZR.

      • Features

        • Detect Video Presence
        • Detect Loss of Video
        • Bridging or Terminated Operation
        • Detection of NTSC or PAL Signals
        • Dry-Contact Outputs
        • Operation from AC or DC Power

      Add Accessories for your TX-VCR:



      Continue Shopping View Cart