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4x4 Video/Stereo Audio
Vertical Interval Matrix Switcher

OMX-4X4

812 Kings Highway • Saugerties, NY 12477

A Division of Tower Products, Inc.

OMX-4X4 SWITCHER SERIAL PROTOCOL SPECIFICATIONS

1.0

PROTOCOL DEFINITION

The serial protocol used by the OMX-4X4 switcher is an asynchronous byte oriented protocol
at 9600 bits per second, no parity, 1 stop: commonly referred to as 9600, N, 8, 1.
There is no protocol encapsulation (e.g., HDLC,SLIP, etc.). Each valid code sent signifies an
operation of the switcher. The switcher contains an 8 byte receive buffer therefore a program-
mer should be careful no to overflow the buffer, causing received bytes to be dropped. As a
guideline, the host program (MAC or PC) should delay 5 milliseconds between send codes.

Table 1 shows the codes for connecting outputs to inputs for basic switching. Note that audio
follows video.

TABLE 1.0: BASIC SWITCHING CODES

HEX VALUE

DESCRIPTION

0x80
0x90
0xA0
0xB0
0x81
0x91
0xA1
0xB1
0x82
0x92
0xA2
0xB2
0x83
0x93
0xA3
0xB3

Connect output 1 to input 1
Connect output 2 to input 1
Connect output 3 to input 1
Connect output 4 to input 1
Connect output 1 to input 2
Connect output 2 to input 2
Connect output 3 to input 2
Connect output 4 to input 2
Connect output 1 to input 3
Connect output 2 to input 3
Connect output 3 to input 3
Connect output 4 to input 3
Connect output 1 to input 4
Connect output 2 to input 4
Connect output 3 to input 4
Connect output 4 to input 4

Содержание OMX-4X4

Страница 1: ...it is designed to give you years of trouble free professional operation for your most demanding applications It is our goal to develop long term partnerships with our customers through our commitment...

Страница 2: ...4 Stereo outputs Unbalanced 600 Unity gain set 1 2Vp p RCAs Performance Measured with 1KHz 1 2Vp p sine wave Frequency Response 10 30KHz 0 1dB S N Ratio 85dB at specified tested center frequency for r...

Страница 3: ...ons in your system All output cables must be properly terminated if the devices being fed these signals provide a terminate option OPERATION Once the unit is properly connected simply select the input...

Страница 4: ...g received bytes to be dropped As a guideline the host program MAC or PC should delay 5 milliseconds between send codes Table 1 shows the codes for connecting outputs to inputs for basic switching Not...

Страница 5: ...he value 0x8C tells the switcher to enable output 1 2 2 OUTPUT CONTROL Outputs can be enabled or disabled If the output is disabled the switched connection remains intact Thus re enabling the output r...

Страница 6: ...drive A of your PC At the A Prompt type Install and hit return Type Y to answer YES for hardware installation The software will create a sub directory called 4X4232 on your hard drive and the copy the...

Страница 7: ...t selected You may also QUIT the program from any of the prompt lines Exiting the program leaves the switcher in the last controlled mode Pressing the front panel switches or enabling the RS232 port a...

Страница 8: ...in overheating 5 Do not clean the unit by using electrically conductive or corrosive chemicals Always be certain to unplug the unit from AC wall power before any major cleaning Use a damp cloth only...

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