22
Command Mode continued:
Sending Commands WITHOUT CHECKSUM
1) To set a video crosspoint:
\\FxxMyyIzz<CR>
e.g. to set video input 3 to output 12 on a router with frame address “0”
send the command: \\F00M12I03<CR>
2) To set RS-232 crosspoint:
\\FxxRyyIzz<CR>
3) To disconnect RS-232 crosspoint:
\\FxxDyyIzz<CR>
4) To set new frame address:
\\FxxFnn<CR>
5) To query crosspoints from PC:
\\FxxU<CR>
• If all outputs are connected to input 1 then a 4x4 Matrix will respond
with
<0x80><0x80><0x80><0x80><CR>
• The router will send back one byte for each output and the string
ends with a <CR>. The first byte sent is Output #1. In the example
above, since there are 5 bytes total, we know that there are 4
outputs.
• To calculate the input number, the router sends the input number
with the 7th bit set.
0x80 = “1000 0000” input 0
0x81 = “1000 0001” input 1
…
0x8F = “1000 1111” input 15
Using RS-232 Control (continued)
