Part Number: VLI771
Title: Video Loss Indicator
Category: A/V Baseband
Industry: CCTV/Security, TV/Radio Broadcast, CATV Cable Industry
|The VLI771 Video Loss Indicator provides a contact closure upon loss of a video synchronizing signal and may be used to transfer your video to a hot standby spare video transmission system or simply to activate an alarm. The unit is so small (3 1/2″ X 4 1/2″ X 1 1/2″) that it can be connected between two coaxial cables and be supported by them, before occupying zero front panel rack space. If you want to put the VLI771 in a rack you can use the convenient angle bracket supplied with each unit to mount it in the rear of an equipment rack.
The video signal loops through the unit so that signal transmission is not lost if power is removed from the ULI771. The alarm contact will not activate during a short duration sync loss, caused by patching or other momentary loss of video, but will activate after 3 seconds of video loss. The alarm contact will also activate in case of Main Power loss to the VLI771. A bright green Light Emitting Diode or L.E.D. monitors the presence of video and can be used as a visual indicator for loss of video. Each VLI771 comes equipped with its own low voltage plug in power supply.
If this product page shows “out of stock” the product is in production and can be purchased with a lead time of 1-2 weeks or less depending on quantity. To place an order for this product call 1-800-235-6960 and ask for the sales department. Or E-Mail your order to firstname.lastname@example.org. Most orders ship within a few days.
|Video Standard||NTSC or PAL (Auto
|Level (Composite Video)||0.7 to 2.0 Vp-p ( 1 Vp-p Std.)|
|Input Impedance||Hi-Z, (Bridging)|
|Connectors||Two, BNC, (Loop Through)|
|Relay Contacts||Form “C”|
|With Video Present||Open *|
|With Video Absent||Closed *|
|With Power Disconnected||Closed *|
|*Both normally open and normally closed contacts available|
|D.C. Power Module||9 Volt D.C.|
|Connector||Matching molded power plug|
|Size||3 1/2″ x 4 1/2″ x 1 1/2″ with mounting bracket. All metal enclosure.|