Comprehensive Video CVG-808xl Selecting the Sync Source, Setting the Configuration Switches

9.3.1Selecting the Sync Source

Input sync selection is made using the "Sync Select” button located on the back panel. For an external sync operation, press the “Sync Select” button. For an internal sync operation, release the “Sync Select” button. This modifies the input circuitry to select the required input sync source.

9.3.2Setting the Configuration Switches

Setting the configuration switches is accomplished through a bank of DIP switches located on the back panel of each Matrix Switcher. Table 3 describes the settings and configurations for each of the DIP switches. To set the configuration switches, confirm that power to the Matrix Switcher is OFF, and with a small flathead screwdriver, move the DIP switches to the "ON" or "OFF" position as shown in Table 3 and Figure 3. Master/Slave DIP switches configure the Matrix Switcher for operation in a multiple switcher configuration. If a Matrix Switcher is operating and being controlled independently, it should be assumed that it is operating in the “Master” configuration.

Up to 8 Matrix Switchers may be cascaded for control via a single port by configuring one Matrix Switcher as a "master", or ID number "1", while all the others are assigned as slave Matrix Switchers or an ID other than "1". When RS-232 connection is implemented, DIP switch # 8 allows you to enable RS-232 communication between the Matrix Switcher and the PC. This is desirable, so that the controlling device “knows” that the controlled device has carried out its instructions. When RS-485 connection is used for communication between the Matrix Switcher and the PC, DIP switch # 8 should be up ("OFF"). In some applications, it may be desirable for some machines not to reply to instructions received on the RS-232 and RS-485 ports. In this scenario, you would disable the “Reply”, or acknowledgement commands. DIP switch # 5 enables or disables "reply" from the Matrix Switcher to the PC.

In the case of interconnection between more than two RS-485 receivers-transmitters (including PC), the termination resistor must be disconnected on all the devices, except the first and last machines on the communication line. DIP switch # 4 connects or disconnects the termination resistor.

Table 3: DIP Switches Configuration

MACHINE		SELF ADDRESS			DIP SWITCH
NUMBER
		2	1	0	3	2	1
1.	(Master)	0	0	0	ON	ON	ON
2.		0	0	1	ON	ON	OFF
3.		0	1	0	ON	OFF	ON
4.		0	1	1	ON	OFF	OFF
5.		1	0	0	OFF	ON	ON
6.		1	0	1	OFF	ON	OFF
7.		1	1	0	OFF	OFF	ON
8.		1	1	1	OFF	OFF	OFF

DIP switch #4	"ON"= Connects the termination resistor.
	"OFF"= Disconnects the termination
	resistor.
DIP switch #5	"ON"= Enables reply from switcher to PC.
	"OFF"= Disables reply from switcher to
	PC.
DIP switch #6,	Not used
DIP switch #7
DIP switch #8	"ON"= Enables RS-232 communication
	between switcher and PC.
	"OFF"= Enables RS-485 communication
	between switcher and PC.

Figure 2: DIP switches General View

9.4RS-232 and RS-485 Operation

Connections made between your switcher and a PC are accomplished using your computer’s RS-232 communication port, or by connecting the PC to the RS-485 terminal block connector. Bear in mind that serial

10