Selecting the right cat5 cable – Inline Warehouse IN1124 User Manual

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IN1124 / IN1130 Operation Manual - Preliminary 9/5/00

© 2000 - Inline, Inc.

ADAPTER / EXTENSION CABLES FOR INPUT AND LOCAL MONITOR /
DISPLAY DEVICE OUTPUT

The IN1124 / IN1130 system has 15-pin HD VGA-type input / output connectors. The following
adapter / extension cables are available:

Computer 3’

6’

12’

25’

35’ - 250’

VGA: 15-Pin HD

Input Cable

IN8006M

IN8012M

IN8025M

IN80xx

Output Cable (optional)

IN8006

IN8012

IN8025

IN80xx

MAC with 15-Pin D:

Input Cable

IN9140M IN9144M

Output Cable

IN9141

IN9145

MAC G3, G4 and PowerBook with 15-Pin HD*:

Input Cable

IN8006M

IN8012M

IN8025M

IN80xx

Output Cable

IN8006

IN8012

IN8025

IN80xx

SUN: 13W3 (may also be used with SGI with RGsB output)
Input Cable

IN9142M IN9146M

Output Cable

IN9143

IN9147

Workstation: 5 BNC / RGBHV

Input Cable

IN9047

IN9045

IN9045-L25

Output Cable

IN9047

IN9045

IN9045-L25

Workstation: 4 BNC - RGBS

Input Cable

IN9100M

*Newer Mac G3 models (with translucent cases) have 15-Pin HD connectors (pins arranged in 3 rows).

Older G3 models (with solid white enclosures) incorporate 15-Pin D connectors (pins arranged in 2 rows).

SELECTING THE RIGHT CAT5 CABLE

The CAT5 standard was created to address issues related to high bandwidth transmission of data
signals. CAT5 cables were not originally intended for video and audio signal transmission and
unfortunately, many performance characteristics that are important for good quality transmission of
video signals are not included in the CAT5 spec and are not tested by most cable manufacturers.
Many cable performance parameters such as attenuation, bandwidth, capacitance and near-end cross
talk are important to video performance; however, impedance and pair-to-pair skew have the
greatest effect when transmitting high resolution video signals over CAT5 cables.

Impedance - There is a wide variance in impedance between different brands of cables. The TIA
/ EIA* standard for CAT5 impedance is 100 ohms -/+ 15 ohms. Some CAT5 cables have an
impedance of 100 ohms +/- 50 ohms, rendering them virtually useless above 100 MHz. The
visible result may be multiple images or “ghosting” in the displayed image.

Skew - Another factor that affects the performance of CAT5 cable is skew (timing differences on
multi-pair cable). Signals arriving at different times could result in misconvergence (improperly
aligned colors) on the video display device. For best performance with high resolution video
signals, we recommend that you select a CAT5 with less than 8 nanoseconds per 100 meters of
cable. Because skew is cumulative, it becomes more visible with longer cable lenghts.

A few manufacturers have now responded with CAT5 cable formulations that were specially
designed to match the stringent requirements of high resolution video signal transmission. The
INLINE IN9500 Series CAT5 cables provide excellent performance with the IN1124 / IN1130.

*Telecommunications Industry Association / Electronic Industries Association

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