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Video Text Overlay Unit with PC keyboard interface

& On Screen Scrolling Message Function

The RTCKBD-S unit is no longer sold.
Order RTCKBDBOX instead and ask for the RTCKBD-S firmware.

This unit features the ability to construct scrolling video text overlays from text typed on each of the unit's eight available screen pages. Each message can be up to the length of the entire screen full of characters. The text, and the scrolling feature, are stored when the unit is switched off and scrolling will restart when power is restored. The unit uses the standard UK or US keyboard key mapping, see the documentation. There is no facility to change to the keyboard mappings of other countries.

The RTCKBD-S unit allows a PC keyboard to be used to create text overlays to annotate a video picture. The RTCKBD-S version does not have a counter interface. Instead it features the ability to create and display scrolling text messages. This is designed for use in ATV repeaters. For full details of the unit's operation please see the details and the documentation.
The message you wish to use can be composed either over the unit's internal video signal or live video. The time and date can optionally be displayed in addition to the message.

The RTCKBD-S unit is housed in an ABS plastic enclosure with phono connectors for video in / out and a 2.1mm DC power socket. It is designed to be powered from the same power supply as the camera and so the unit does not have a power switch. Keyboard connection is via a 6-pin mini DIN socket for a PS/2 keyboard. These units will not work with USB only keyboards which require PC operating system support. They will only work with standard PS/2 keyboards and USB keyboards which implement PS/2 functionality. The latter can be connected via a USB to PS/2 adapter. Flexible keyboards similar to the one shown above, not included, are compatible if they have PS/2 functionality. The character size cannot be changed by the user, although some customisation of the character set is possible. Please contact us before you make your order for details of customisation.


For a board only version of RTCKBD-S order RTCKBD and advise us you want the scrolling version.

flexible keyboard
A keyboard is not included. Order the FLEXKYBD item for use with these units.
document Documentation

To use the RTCKBD board you will need to make connections for the keyboard, video in, video out and power as described on the RTCKBD overlay board connections page.
Eight separate text pages 26 x14 characters PAL, 26 x 11 rows NTSC. Font and character size fixed.
24 hour format Real Time Clock
UK English or US International keyboard mapping available.
Compatible with colour and mono composite video signals. 1Vp-p. PAL or NTSC
RTCKBD-S dimensions 110 x 65 x 28mm LxWxH
RTCKBD dimensions 60 x 54 x 20mm LxWxH
Power supply required 9 - 12V DC
Power consumption 50mA (without keyboard)
Operating Temp. 0° - 85°C

The RTCKBD-S unit can be supplied with BNC connectors on request. Please email us prior to ordering.



© The BlackBoxCameraTM Company Limited 2017