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Controls and indicator, Operation, Specifications – Extron Electronics SEQ 100 15HD User Guide User Manual

Page 12: Versatools, Seq 00 skew equalizer, cont’d

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VersaTools

®

SEQ 100 Skew Equalizer

VersaTools

®

SEQ 00 Skew Equalizer, cont’d

VersaTools

®

SEQ 100 Skew Equalizer

Controls and Indicator

a

Power LED —

This front panel LED (figure 14) lights to indicate

that the SEQ 100 Skew Equalizer is receiving power.

GREEN

RED

BLUE

SEQ 100 15HD

1

2

2

2

Figure 14 — SEQ 100 Skew Equalizer front panel

b

Red, Green, and Blue skew adjustment rotary switches —

These 16-position rotary switches delay the associated

red, green, or blue video signals by approximately 3

nanoseconds per position, up to 39 nanoseconds.

See the table below:

Position Delay Position Delay Position Delay Position Delay

1
2
3

0 ns
3 ns
6 ns
9 ns

5
6
7

10 ns
13 ns
16 ns
19 ns

9

10
11

20 ns
23 ns
26 ns
29 ns

13
14
15

0

4

8

12

30 ns
33 ns
36 ns
39 ns

Operation

When the video source, transmitter, SEQ 100, receiver, and

display are powered up, the system is fully operational. Adjust

the equalization as follows:
1.

Rotate all three skew adjust rotary switches to the zero ( )

position.

2

.

Use UTP cable test equipment or examine the displayed

video image with a critical eye to determine which video

signal, red, green, or blue, is most shifted to the left.

N

A crosshatch test pattern is ideal for determining pair

skew.

3

.

Adjust the left-shifted video signal’s rotary switch

clockwise one step at a time while monitoring the display.

Step the switch until the video signal is properly converged.

N

The SEQ 100 cannot shift the rightmost video image to

the left.

4

.

If either of the other video signals is misconverged, repeat

steps 2 and 3.

Specifications

Video

Gain ................................................ Unity

Video input

Number/signal type ..................... 1 RGBHV, RGBS, RGsB, component video
Connectors .................................... 1 female 15-pin HD
Nominal level ................................ 1 Vp-p for Y of component video

0.7 Vp-p for RGB and for R-Y and B-Y of
component video

Minimum/maximum levels ........ Analog: 0.3 V to 1.45 Vp-p with no offset

at unity gain

Impedance ..................................... 75 ohms
Horizontal frequency .................... 15 kHz to 130 kHz
Vertical frequency .......................... 30 Hz to 150 Hz

Video output

Number/signal type ..................... 1 RGBHV, RGBS, RGsB, component video
Connectors .................................... 1 female 15-pin HD
Nominal level ................................ 1 Vp-p for Y of component video

0.7 Vp-p for RGB and for R-Y and B-Y of
component video

Minimum/maximum levels ........ 0.3 V to 1.45 Vp-p (follows input)
Impedance ..................................... 75 ohms

Sync (pass-through)

Input type ...................................... RGBHV, RGBS, RGsB
Output type .................................... RGBHV, RGBS, RGsB (follows input)
Input/output level ....................... TTL: 5.0 Vp-p, unterminated
Input impedance .......................... 75 ohms
Output impedance ....................... 75 ohms
Max input voltage ........................ 5.0 V p-p
Polarity............................................ Positive or negative (follows input)