Kramer Electronics VS-1211 15.

KRAMER ELECTRONICS LTD.

Problem Remedy

The switcher is switching, but there

are transitional effects when using

genlocked sources. The picture

jumps and rolls, and the color is lost

until the acceptor (a VCR, for

example) has readjusted itself to the

new color information.

There is no vertical interval Sync source for switching. It should be available

either on video input #1 or on an external genlocked source as a live video or a

live black burst signal. Which one, will depend on certain jumper settings.

Turn OFF the power switch, remove the power cable from the mains socket and

carefully remove the cover of the switcher. Carefully remove the audio board by

unscrewing the four upper board screws. The upper board can now be raised with

ease. Find jumper J20 (also J34 in an interconnected configuration) and set up

the Sync source in accordance with "Jumpers, Their Uses and Set-up

Requirements" (see section 9.2).

15.

The protocol used for communication between the PC and the Master VS-1211/1201xl is defined as follows:

MSB LSB

N7 N6 N5 N4 N3 N2 N1 N0

Where:

N7 is used for communication between the Slave and the Master only and is always 0 for communication with

the PC.

N6N5N4 is the binary value of the Machine we are addressing minus one, e.g., if we wish to address the Master

(Machine 1 by definition), then N6N5N4 = 000, if we wish to address Machine 6, then N6N5N4 = 101.

N3N2N1N0 is the binary value of the input to be selected, i.e. N3N2N1N0 = 0111 is equivalent to pressing

switch 7 on the front panel.

Several special codes are also valid:

N3N2N1N0 = 1101 requests that the Machine being addressed sends its present status to the PC, i.e. which

input is selected on its front panel.

N3N2N1N0 = 1110 is an "OK" handshake, i.e. confirmation that the instruction was received by the addressed

Machine. (If the addressed Machine is not present, then this confirmation is not sent to the PC).

Information sent from the Master to the PC is done using the same format, i.e.:

0 Machine Number -1 New Switch Status

N7 N6N5N4 N3N2N1N0

The rate of data transfer is always 9600 baud, with no parity, 8 data bits and 1 stop bit.