Moog Components Group
Mini4, Rev C
February 23, 2009
(201580-xxx And 201590-xxx)
Page 4 of 19
video analog-to-digital converters (ADCs) and the data interface chips) through a programmable logic
device. The boards also provide the interface for a daughter board connection.. A block diagram of the
basic Mini4 Video Input and Output Board I/O is shown on the following page and explained in the
subsequent paragraphs.
The transmit portion (uplink from vehicle to surface) of the M4 Video Input board takes in the 4 video
signals from the ADCs, the 6 onboard serial data signals and the daughter board data and clock signals
and converts them to a single serial optical signal. The signal is transmitted to the M4 Video Output
board at the other end of the fiber optic link in the control/viewing area. The receive portion of the M4
Video Output board accepts the optical signal, recovers the 4 video channels, recovers the 6 serial data
signals and routes them to the appropriate RS-232/RS-485/RS-422 driver chips, and recovers the daughter
board clock and data signals and routes them to the daughter board connection.
There are no video signals in the optical signal from the Mini4 Video Output board. The transmit portion
(downlink from surface to vehicle) of the M4 Video Output board takes in the 6 onboard serial data
signals and the daughter board data and clock signals and converts them to a single serial optical signal.
The signal is transmitted to the M4 Video Input board at the other end of the fiber optic link in the
vehicle. The receive portion of the M4 Video Input board accepts the optical signal, recovers the 6 serial
data signals and routes them to the appropriate RS-232/RS-485/RS-422 driver chips, and recovers the
daughter board clock and data signals and routes them to the daughter board connection.
The M4 boards require a +5VDC power source provided through the 2-pin Phoenix connector at J4. The
boards have an on-board 5V to 3.3V and 2.5V converters to provide power for the components that use
those supply voltage.