Extron electronic SWP123 manual Decoder Loop Function, Wiring the decoder loop

4.Stop speaking into the microphone. The main program audio should recover to the previous level after approximately two seconds. If not, increase the threshold by turning the Talk Over Threshold Adjust pot counterclockwise.

+24V Phantom Power switch

If a condenser microphone is used and power is required, set the +24V Phantom Power switch on the back panel of the switcher to On.

Decoder Loop Function

For data projectors, plasma displays, and other displays on which the composite video and S-video inputs do not work independently, the SWP123 is equipped with a decoder loop function that converts all composite video signals to S-video. This is accomplished by using an external Extron YCS Transcoder or a VYC 100N/P composite video to S-video decoder. Once the decoder loop is configured and programmed, the following occurs when you select a composite video input:

•The switcher automatically selects Input 4 in the S-video A/V group to enable the loop.

•The Extron YCS Transcoder or VYC 100N/P composite video to S-video decoder converts all composite video signals coming through the switcher to S-video.

Wiring the decoder loop

1.Connect the output of the Composite Video A/V group to the composite input of the transcoder or decoder.

2.Connect the S-video output of the transcoder or decoder to S-video input 4 of the SWP switcher.

3.Connect the S-video output of the SWP switcher to the S-video input of the display device.

4.Activate the decoder loop using the correct RS-232 serial command (see chapter 5) or the ICS100 Control Software (see chapter 4).

Projector

SWP123

VCRs

S W P 1 2 3 - 2

AUDIO

[VGA]

AUDIO [S - VIDEO]

AUDIO [COMPOSITE]

100-240V

0.4A 50/60Hz

MASTER

L

L

L

L

OUTPUT

L

L

L

L

OUTPUT

L

L

L

L

OUTPUT

AUDIO

+24V

TALK OVER

OUTPUT

+

+

+

+

PHANTOM

THRESHOLD

POWER

ADJUST

- R

- R

- R

- R

OFF

+

R

R

R

R

- L

R

R

R

R

- L

R

R

R

R

- L

- L

ON

INPUT 1

INPUT 2

INPUT 3

INPUT 4

+

INPUT 1

INPUT 2

INPUT 3

INPUT 4

+

INPUT 1

INPUT 2

INPUT 3

INPUT 4

+

+

MIC INPUT

MADE IN U. S. A .

FUSE: 1.6A 250V

TIME DELAY

VGA

S - VIDEO

COMPOSITE VIDEO

SERIAL

SERIAL

INPUT 1

INPUT 2

INPUT 3

INPUT 4

OUTPUT

INPUT 1

INPUT 2

INPUT 3

INPUT 4

OUTPUT

INPUT11

INPUT22

INPUT33

INPUT44

OUTPUT

PORT

L I S T E D

FORMAT C

1 T 2 3

R X +

SELECT

I . T. E .

R X -

T X +

T X -

MADE IN

G N D

R S 2 3 2

USA

R S 4 2 2 / 4 8 5

Extron

YCS Transcoder

Composite Video/ S-Video Transcoder

9V

0.7A MAX.

PAL

NTSC

COMPOSITE TO S-VIDEO

INPUT

BUFFERED OUTPUT LOOP-OUT

S-VIDEO TO COMPOSITE

INPUT

BUFFERED OUTPUT LOOP-OUT

Figure 3-2 — Wiring the decoder loop

SWP123 Presentation Switcher • Operation 3-5