The Model MDT-4B 5-Channel Block Coded Visor Transmitter is designed
for use with Linear’s access control products. The Model MDT-4B is
five-channel device. Pressing one of the transmitter’s front buttons
sends channel one through four. Pressing the small button on the
transmitter’s top sends channel five. The top button can be hidden with
the top button cover supplied. Also included are lithium batteries with a
five-year service life and a visor clip.
The transmitter is MegaCode format, which means each transmitter is
factory preprogrammed with one of over 1,000,000 codes, virtually
eliminating the possibility of code duplication. Because the receiver
”learns” each specific code, no unauthorized person can gain access to
the system by reprogramming a transmitter.
Block coded transmitters are factory programmed to a sequential
series of transmitter ID codes. When used with a Linear access
controller, transmitters can be locally or remotely programmed into
memory by entering the first and last codes of the block into the
system. Facility codes can be selected to further customize the system.