Net Mux

Card Layout

(Straight from the old website):

The Net Mux has 4 cards on the back - 2 for audio and 2 for video. From 1 to 4 on the control panel they are:

1 - Network Video (i.e. the output goes to the wired network)

2 - Network Audio (audio to the network)

3 - Stream Video (currently goes only to a monitor, but will feed the web stream)

4 - Stream Audio (audio to the stream - currently entirely unconnected)

The card physical layout is independant, with the four cards being Net Audio, Stream Audio, Net Video, Stream Video from top to bottom. Video Inputs

The video inputs are currently the same for the network and the stream. They are:

1 - GFX Comp

2 - DaVE

3 - MUX 1

4 - MUX 2

5 - MUX 3

6 - MUX 4

7 - 11 - empty

12 - reserved for freeview

13 - Tuna

14 - Vidserv

15 - Inform

16- Clock Audio Inputs

The network audio is on D-connectors which are connected to the NetMuxBreakout in the rack. The inputs are:

1 - Sound Desk

2 - Silence

3 - for OB input

12 - Reseved for Freeview

13 - Tuna

14 - Vidserv

Serial Operation

(Straight form the old website)

The mux has a standard RS232 serial port on it, as well as various other (standard but unusual) communications ports. The serial port is what is used to control the mux automatically from the NetMuxController.

Information returned via the serial link into hyperterminal when the unit is switched on:

                       BASIC COMMAND LINE ENTRY SYNTAX

BUFFER [#] [OFF/CLEAR] . . . Set or reset Buffer Mode, clear Salvo Buffer CLEAR # [,#,...] . . . . . . Cancel crosspoint or clear crosspoint request DESTINATION # [,#,...] . . . Take crosspoints or set crosspoint request EXECUTE # . . . . . . . . . Take Salvo Buffer crosspoint requests INFORMATION . . . . . . . . List system status and operational parameters LEVEL # . . . . . . . . . . Set current Level number POLL # . . . . . . . . . . . Poll source connections QUERY . . . . . . . . . . . List basic Command Line entry syntax READ . . . . . . . . . . . . List current crosspoint status SOURCE # . . . . . . . . . . Set current Source number TERMINAL [ON/OFF] . . . . . Set or clear Echo Mode VERIFY # . . . . . . . . . . List Salvo Buffer crosspoint requests XPT [#:] #,# [,#,...] [/...] Set specified crosspoints ZERO . . . . . . . . . . . . Reset X-plus frame

The key commands are:

   * READ to find out the current inputs selected
   * LEVEL N to control which of the 4 outputs are selected for alteration
   * BUFFER A to assign a buffer to load commands into
   * BUFFER CLEAR to empty it
   * XPT X,01 to add a command to the buffer for input X
   * EXECUTE A to execute queued commands

All commands can be abbreviated to the single initial letter.

A simple example would be:

>BUFFER 02 >BUFFER CLEAR >LEVEL 01 >XPT 03,01 >EXECUTE 02

Which sets output 2 (of 4) to input 3. When the EXECUTE command is sent.

A more complex example, setting outputs 1 and 2 to 5, output 3 to 7 and output 4 to 10, would be:

>BUFFER 01 >BUFFER CLEAR >LEVEL 00 >XPT 05,01 >LEVEL 01 >XPT 05,01 >LEVEL 02 >XPT 07,01 >LEVEL 03 >XPT 10,01 >EXECUTE 01

Reading back the status of the cards after this gives us:

>READ

   Level 00: 01,05;

   Level 01: 01,05;

   Level 02: 01,07;

   Level 03: 01,10;

with the inputs selected (5,5,7,10) clearly visible.