The Mux

Because this is primarily a video device, its inputs and outputs are described in the Vision Path section.

The device on the desk controls main mux. Press one of the four blue buttons, and then on of the 32 grey buttons according to which of the 32 inputs you wish to go to one of the four outputs.

I've forgotten what the red buttons did, but they're now redundant.

The main mux is the huge black thing in the AV rack, it routes video to different places, and also has analogue TV demodulators in. The main mux is controlled by an outboard box which sits on the directors/vision mixers desk.

Functions

• 32 input to 4 output matrix
• 2 Nicam stereo tuners

Faults

2 composite inputs to the matrix are dead.

Controller pinout

1 - +5V power

2 - 0V ground

3 - | 32x4 crosspoint switch control lines

4 - | - consisting of a clock (rising edge trigger)

5 - | CS (active-low) and Data

6 - NC

7 - Station Tuner control (I2C Data)

8 - Net Tuner control (I2C Data)

9 - Station/Net Tuner common control line (I2C Clock)