9.3The Internal Trimmers
The trimmers are internally located and are accessed through holes in the switcher base (see section 14.2 “ Weak Switcher Video Signals” ). These allow you, if necessary, to adjust the switcher output signal level and cable compensation.
10.CONTROLLING THE SWITCHER
The VS-1211/411 and VS-1201xl/401xlm switcher families can be controlled by the following methods:
By touch buttons on the front panel (see section 12.2 "Operating an Individual Switcher").
By direct remote contact closure via the DB-15 socket (a switch panel that the customer rigs up).
By PC or other remote control via the switcher's RS-232 or RS-485/422 connector.
There are three different options for the RS-232 or RS-485/422 remote control:
1.A PC that communicates with the switcher directly.
2.A Serial remote control unit such as the KRAMER VS-2000 or VS-3000 (see section10.1) or the VS-1N/P (see section 10.2) combination.
3.Any RS-232 or RS-485/422 controller, which is programmed according to the protocol of the switcher (see section 15 “ Protocol Used for VS-1211 Communication").
10.1The VS-2000 System
The KRAMER VS-2000 is a Programmable Remote Control Unit, designed for use in video production and duplication studios and in live broadcasting and editing configurations. It provides access to and control of up to six groups of KRAMER switchers from a single point. A group can comprise several interconnected switchers which, in turn, permit access to various pieces of equipment (monitors, mixers, editors, VCRs, etc). The VS- 2000 can be controlled by pressing its front panel touch buttons, or via a PC using the RS-232 control port. KRAMER PC control software is provided with the BC-2000. Since new switcher types are constantly being added and older types upgraded, KRAMER provides a small door marked "EPROM" on the VS-2000 rear panel for easy replacement of the existing chip with an updated chip. This will contain the appropriate information for the new and modified switchers. KRAMER will make updated chips available periodically. The VS-2000 can store and recall preferred configurations for convenience in studio control.
10.2 The VS-1N/VS-1P System
The VS-1N RS-232 Remote Controller interfaces between any KRAMER RS-232 controlled switcher of the VS-1211/411 series, and a remotely located simple switching assembly. By pressing one of the remote switches, a connection command is sent to the switcher via the VS-1N and the RS-232 link. The VS-1N permits remote control of a KRAMER switcher, without interfering with local control by the built-in touch buttons on the switcher itself, and without using a PC. In fact, the VS-1N is a translator, simulating a computer to the switcher via its RS-232 port. It accepts mechanical contact switching from the remote point using a KRAMER VS-1P satellite unit or a switch panel that the customer rigs up himself. The VS-1P is an optional, 24-switch assembly connected to the VS-1N via a 25 wire flat cable, equipped with the appropriate connectors, and may be purchased separately as a small single unit. An alternative option is the VS-1P2, a dual VS-1P unit, in a 19-inch rack configuration. The VS-1N/VS-1P set-up is an ideal remote control for use in video production studios, in live broadcasting configurations, in CCTV and in security applications. The remote connector socket pinout and functional description are shown in Figure .
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