![](/images/new-backgrounds/1186273/18627325x1.webp)
NTI VEEMUX VIDEO MATRIX SWITCH
On the
Baud Rate
The unit powers up with a default baud rate of 9600 and a fixed data protocol of 8 data bits, no parity and 1 stop bit. The baud rate can be changed by pressing the MENU button on the front panel keypad. Then select 1 for SET BAUD RATE and select the desired baud rate of 9600, 2400, 1200 or 300. A data protocol of 8 data bits, no parity, and 1 stop bit is used for communications.
Unit Address
To allow multiple units to be controlled from a single CPU port, the RS232 control interface is designed to allow "daisy chaining" up to 15 units using the NTI
To set the unit address:
- press ENTER.
RS232 |
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CPU Serial Port |
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RS232 | RS232 | RS232 |
NTI | NTI | NTI |
SWITCH | SWITCH | SWITCH |
First Unit | Second Unit | Last Unit |
Figure 6- RS232 connection with Matrix-Y-1 cable
Command Protocol
CPU controller commands supported by the unit are defined below. All commands should be terminated with a <CR> (carriage return). When a command is sent, the entire string is echoed back along with a response from the addressed unit as shown in the command definitions table below. All characters in the command string should be upper case, and all numbers below 10 should have a leading 0 (ex: 1 = 01). As command strings are sent, the inner character delay cannot exceed 500 milliseconds.
Note: To use this command protocol, the user is required to write a program that will send an entire command string all at once, not character by character. Programs that send one character at a time (such as HyperTerminal) cannot be used to control the VEEMUX. Alternatively, the user may use the Matrix Switcher's Control Program or SerTest to control the VEEMUX via RS232 (see page 11).
Legend: |
| (All numbers must be two digits) |
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SW | : | Switch | MM | : | Save Into Memory Bank |
BR | : | Baud Rate Code (12,24,48,96) | LL | : | Load From Memory Bank |
OP | : | Output Port | <CR> | : | Carriage Return (Hex 0xD) |
IP | : | Input Port | ip | : | IP address |
Command Definitions
| Command |
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| Good Response |
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| Description |
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| String |
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| CS SW,IP,OP | *<CR> |
| Connect One Output Port To Input Port | ||||
| CA SW,IP | *<CR> |
| Connect All Output Ports To Input Port | ||||
| RO SW,OP | *<CR>IP<CR> | Read Connection For Output/User Port | |||||
| CC SW,MM | *<CR>MM<CR> | Save Matrix Connections Into Memory Bank xx | |||||
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| RC SW,LL |
| *<CR>LL<CR> |
| Restore Matrix Connections From Memory Bank | |||
| CB 00,BR |
| None |
| Change baud rate of serial line, BR=12(00),24(00),48(00),96(00) | |||
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| Factory default is 9,600 |
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