SC&T VKM02 User manual

Smart Cabling & Transmission Corp. V1.0
VGA/ KVM Extender
User Manual
Model : VKM02
Passive VGA Keyboard Mouse CAT5e Extender - USB Interface

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User Manual
VKM02
Introduction
VKM02 is a VGA extender that use 2 CAT5 STP or UTP cable to not only carry VGA signal but also USB one,
with transmission distance up to 100M. it's a perfect solution used in home, shopping malls, classrooms,
and boardrooms… etc.
Features
Resolution up to 1280 x 1024 pixels.
Signal extension up to 100M over a 4 pairs CAT5e STP or UTP cable.
Built-in virtual DDC at TX unit to avoid improper setting for resolution and frequency.
Built-in sync mode selection at TX unit for signal stability.
Built-in sync filter level adjustment at RX unit for signal stability.
Installation View
Panel View
VKM02T (Local unit)
VKM02R (Remote unit)

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User Manual
VKM02
Recommend Cable
1. CAT5e UTP/STP or Cat6 UTP cable.
2. There are some certain models or brands of monitors with very high demand at sync-sensitive,
recommend use STP (shielding twisted pair) cable to instead of UTP (unshielded twisted pair)
cable.
RJ45 Pin Configuration
TIA/EIA 568B Wiring standard
Video Link Cable
Data Link Cable
1. Orange-white
Video Red +
1. Orange-white
Keyboard Clock
2. Orange
Video Red -
2. Orange
Keyboard Data
3. Green-white
H-Sync
3. Green-white
Power 1
4. Blue
Video Green +
4. Blue
Ground 1
5. Blue-white
Video Green -
5. Blue-white
Power 2
6. Green
V-Sync
6. Green
Ground 2
7. Brown-white
Video Blue +
7. Brown-white
Mouse Clock
8. Brown
Video Blue –
8. Brown
Mouse Data
Switch Setting
VKM02T Sync Mode Select
←Mode 1
→Mode 2
1. For new type monitors, such like over 17”LCD Monitor, recommends setting at mode 1 for the best
stability. If the picture not normal, then switch to Mode 2.
2. For old type monitors, such like CRT or under 17” LCD Monitor, recommend setting at mode 2. If the
picture still not normal after adjust the dip switch of VKM02R. Then please use STP (shielding
twisted pair) cable.

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User Manual
VKM02
DIP Switch Setting
VKM02R Sync Filter Level
ON
↓
↓
↓
↓
↓
Level 0 (Min)
↑
↓
↓
↓
↓
Level 1
↓
↑
↓
↓
↓
Level 2
↓
↓
↑
↓
↓
Level 3
↓
↓
↓
↑
↓
Level 4
↓
↓
↓
↓
↑
Level 5
1
2
3
4
5
Sync Filter is designed for using UTP CAT5 cabling.
Sync Filter level adjustment is to add the sync stability, but not adjust picture quality or eliminate skew.
Since different brand monitor have different setting, so there is no recommended setting. Please adjust
the level based on picture stability. If no picture display or picture not stable, then please use STP cable.
Caution
1. The wiring must be away from electromagnetic equipment, i.e., microwave, wireless, high
voltage cable… etc.
2. The maximum distances supported by the VGA Extender are dependent on the type of twisted
pair cable and image resolution of the PC’s VGA interface. Make sure that the maximum
recommended operational distances have not been exceeded.
3. All wiring is “straight-through” twisted pair cable, not being used for other LAN or telephone
equipment.
4. Do not connect the VGA Extender to a telecommunication outlet wired to unrelated equipment.
5. If the keyboard mouse work abnormal, please reverse the cable of keyboard mouse.

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VKM02
Troubleshooting at picture problem
No picture displays
Check Link cable.
Check DIP switch setting.
Check VGA cable connect.
Change the resolution or frequency.
Change Link cable for STP cable.
Picture not stable or disappear intermittence or no picture display:
Check DIP switch setting.
Change the resolution or frequency.
Wiring away from electromagnetic equipment.
Change Link cable for STP cable.
Picture tilt
Check DIP switch setting.
Change the resolution or frequency.
Change Link cable for STP cable.

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User Manual
VKM02
Specification
ITEM NO.
VKM02T
VKM02R
Support
Compliance
TTL
Max. Video Resolution
1280x1024px
Max. Transmission Distance
100M over CAT5/ CAT5e/ CAT6 /STP or UTP Cable
Video Bandwidth
300kHz
Video Insertion Loss
Less than 3dB
Video Return Loss
-15dB
Ports & Interfaces
Video Input
1 x DB15 (75 ohms, 1.1V p-p)
1 x RJ45 (100 ohms)
Video Output
1 x RJ45 (100 ohms)
1 x DB15 (75 ohms, 1.1V p-p)
Data Input
1 x USB Type B
1 x RJ45 (100 ohms)
Data Output
1 x x RJ45 (100 ohms)
2 x PS/2
Setting Switch
1 x 2-position Slide Switch
1 x 5-position DIP Switch
Ambient Temperature
Operation
0 to 55℃
Storage
-20 to 85℃
Humidity
up to 95%
Physical Characteristics
Dimensions
108 x 72.2 x 27mm
108 x 72.2 x 27mm
Weight
105g
115g