Sony SRG-X400 BRC-X400 / X401 / SRG-X400 / X402 / 201M2 / X120 / HD1M2 VISCA C - Page 3

VISCA VISCA1) is a protocol developed by Sony for controlling a consumer's camcorder. Overview of VISCA In VISCA, the side outputting commands, such as a computer, is called the controller, while the side receiving the commands, such as a BRC-X400/ X401, SRG-X400/X402/201M2/X120/HD1M22), is called the peripheral device. In VISCA, up to seven peripheral devices including this unit can be connected to a single controller using communication conforming to the RS-422 standard. The parameters of RS-422 are as follows. • Communication speed: 9600 bps/38400 bps • Data bits : 8 • Start bit : 1 • Stop bit : 1 • Non parity Flow control using XON/XOFF and RTS/CTS, etc., is not supported. Peripheral devices are connected in a daisy chain. As shown in Fig. 1, the actual internal connection is a one-direction ring, so that messages return to the controller via the peripheral devices. The devices on the network are assigned addresses. The address of the controller is fixed at 0. The peripheral devices are assigned to the addresses, 1, 2, 3... in the connected order, starting from the one connected nearest to the controller. These addresses are set when the controller sends address commands during initialization of the network. Note Each VISCA equipment has VISCA IN and VISCA OUT connectors. Set the DTR input (the S output of the controller) of VISCA IN to H when controlling VISCA equipment from the controller. Fig. 1 VISCA network configuration ...1) "VISCA" is a trademark of Sony Corporation. 2) The product name of this unit, "Color video camera BRC-X400/X401, SRG-X400/X402/201M2/X120/HD1M2" is referred to as "the unit" or "color video camera" in this document. 3