Kramer Electronics VS-4X4 user manual Audio Signal, Control

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Problem

Remedy

 

 

Noise bars “roll” up

Hum bars (ground loop) are caused by a difference in the ground potential

or down in the output

of any two or more devices connected to your signal path. This difference is

image

compensated by passing that voltage difference through any available

or:

interconnection, including your video cables.

 

WARNING!

Low frequency hum

 

 

Do not disconnect the ground from any piece

in the output signal

 

 

of video equipment in your signal path!

 

 

 

Check the following to remove hum bars:

 

1.

Confirm that all interconnected equipment is connected to the same

 

 

phase of power, if possible.

 

2.

Remove equipment connected to that phase that may introduce noise,

 

 

such as motors, generators, etc.

 

3.

Disconnect all interconnect cables and reconnect them one at a time until

 

 

the ground loop reappears. Disconnect the affected cable and replace, or

 

 

insert an isolation transformer in the signal path.

15.3 Audio Signal

 

 

 

 

Problem

Remedy

 

 

 

No audio at the output

1.

Confirm that your sources and output device are powered on and

device, regardless of

 

connected properly. Audio signals connected to the input of your

input selected

 

switcher should be properly wired to the output of your source. Audio

 

 

signals connected to output of your switcher should be properly wired

 

 

to the input of your switcher or recorder.

 

2.

Confirm that any other switchers in the signal path have the proper

 

 

input and/or output selected.

 

 

 

Audio level is too low

1.

Confirm that the connecting cables are of high quality and properly

 

 

built. Take special care in noting the wiring configuration of balanced

 

 

to unbalanced cables.

 

2.

Check level controls located on your source input device or output

 

 

display or recorder.

 

 

 

15.4 Control

Problem

Remedy

 

 

 

No control of switcher

1.

Confirm the wiring of the connecting cable. Cable length should not

from PC software

 

exceed 25 feet.

 

2.

Confirm that all DIP switches on the switcher have been set properly.

 

 

Keep in mind that if you are only controlling one switcher on a specific

 

 

port, that switcher must be assigned the ID of “1”.

 

3.

Confirm that the baud rate of your computer COM port is set to the

 

 

same as that of your switcher (9600-Baud). Confirm that the proper

 

 

COM port is selected in the control software.

 

4.

Confirm that bi-directional communication is enabled on all switchers.

 

 

With custom software, do not send multiple commands at the same

 

 

time. The switcher must complete one command before receiving

 

 

another.

 

 

 

KRAMER ELECTRONICS, LTD.

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Contents VS-4X4YC 8650$18$/$180 Table Of Contents Introduction Word on Video/Audio SwitchersFactors Affecting Quality of Results Unpacking and Contents SpecificationsHOW do I GET STARTED? Optional Accessories Kramer VS-4X4YC Matrix Solutions Provided with the VS-4X4YCVS-4X4YC can be Used AS Quick Reference GuideConnecting to Video Devices InstallationConnecting to Audio Devices Rack MountingUsing the Front Panel Controls Using the VS-4X4YC Turning on the MatrixDIP Switch Settings Protocol used for RS-232 Communication RS-232 ControlMSB LSB MSBPage Power and Indicators TroubleshootingVideo Signal Taking Care of Your MatrixControl Audio SignalHOW Long is the Warranty Limited WarrantyExclusion of Damages Limitation of Implied WarrantiesMail kramerel@netvision.net.il