User’s Guide
GLI 2000 5BNC
GLI 2000 2BNC
Passive Ground Loop Inhibitors
68-811-01 Rev. B
11 05
Introduction
The GLI 2000 5BNC and GLI 2000 2BNC are heavy-duty, passive
ground loop inhibitors. Ground loop inhibitors eliminate hum
bars (as shown below) and common mode noise caused by
improper video equipment grounding. Ground loop problems
can be caused by using AC power sources with different ground
levels or by plugging high-current equipment into the same
power source as video equipment.
Hum bars
The GLI 2000 series consists of the following models:
GLI 2000 5BNC — The GLI 2000 5BNC inhibits ground loops on
RGBHV, RGBS, RGsB, or RsGsBs video signals. The unit has five
female BNC connectors for input and five for output.
GLI 2000 2BNC — The GLI 2000 2BNC inhibits ground loops on
S-video or composite video signals. The unit has two female
BNC connectors for input and two for output.
Both models feature high bandwidth, high core saturation
voltage to handle even the worst ground loop problems, and
guardrails to protect the connectors.
GLI 2000 Series • Introduction
1
Installation
The GLIs can be mounted on a standard universal 2U rack shelf.
Rack mounting
Mount the GLIs on a standard universal 2U rack shelf
(Extron part #60-032-01). The GLI 2000 5BNC mounts in one of
four locations at the front or the rear of the rack. The GLI 2000
2BNC mounts in one of eight locations at the front or rear of the
rack.
1. Remove rubber feet if they were previously installed on the
bottom of the GLI.
2. To mount the GLI 2000 5BNC on the shelf, use four 4-40 x 3/
16" screws in the corners to secure the GLI to the shelf.
To mount the GLI 2000 2BNC on the rack shelf, use two
4-40 x 3/16" screws in opposite (diagonal) corners to secure
the GLI to the shelf.
3. Install blank panel(s) or other unit(s) on the rack shelf.
4. Attach the rack shelf to the rack using the supplied bolts.
Extron
GLI 2000 5BNC
Ground Loop Inhibitor
(2) 4-40 x 3/16"
screws
Mounting the GLI on a standard 2U rack shelf
GLI 2000 Series • Installation
2
Use 2 mounting holes
(opposite corners)
(4) 4-40
x 3/16"
screws
C
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G
P
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N
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G
Use 4 mounting holes
Extron
GLI 2000 2BNC
Ground Loop Inhibitor
T
U
P
N
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H
B
G
T
U
P
R
T
U
O
(each corner)
GLI 1000 5BNC
V
Installation, cont’d
Typical GLI 2000 application
Connections
GLI 2000 5BNC
Extron
RGB 109xi
Interface
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N
P
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F
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1
4
1
IN
N
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H
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P
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ID
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D
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9
x
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P
PC
Extron
GLI 2000 5BNC
Ground Loop Inhibitor
C
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Extron
GLI 2000 2BNC
Ground Loop Inhibitor
1
INPUT
GLI 1000 5BNC
V
T
U
P
N
I
H
B
G
T
U
P
R
T
U
O
Projector
R
G
BH
V
OUTPUT
2
GLI 2000 5NBC connectors
Input connectors — Connect an RGBHV, RGBS, RGsB, or
1
RsGsBs video source to these five BNC connectors.
Output connectors — Connect an RGBHV, RGBS, RGsB, or
2
RsGsBs video display to these five BNC connectors.
GLI 2000 Series • Installation
GLI 2000 5BNC
GROUND LOOP INHIBITOR
3
GLI 2000 2BNC
The H and V channels on the GLI 2000 5BNC have a
bandwidth of 200 MHz, rather than 425 MHz, and should
not be used for high-resolution signals.
1
VIDEO/Y
IN
VIDEO/C
OUTOUT
IN
GLI 2000 2BNC
GROUND LOOP INHIBITOR
2
GLI 2000 2NBC connectors
Input connectors — Connect an S-video source or two
1
composite video sources to these two female BNC
connectors.
Output connectors — Connect an S-video display or two
2
composite video displays to these two female BNC
connectors.
GLI 2000 Series • Installation
4
Specifications
Video
Gain ................................................... Unity
Core saturation voltage .................. >10V
See the Extron Web site for details on core saturation test
conditions.
Bandwidth
GLI 2000 5BNC ................... >425 MHz (-3dB) for RGB, >200 MHz
GLI 2000 2BNC ................... >100 MHz (-3dB)
CMRR
GLI 2000 5BNC ................... >58dB @ 50 Hz or 60 Hz
GLI 2000 2BNC ................... >53dB @ 50 Hz or 60 Hz
Video input
Number/signal type
GLI 2000 5BNC ................... RGBHV, RGBS, RGsB, RsGsBs
GLI 2000 2BNC ................... 1 S-video or 2 composite video
Connectors
GLI 2000 5BNC ................... 5 female BNC
GLI 2000 2BNC ................... 2 female BNC
Nominal level .................................. 1V p-p for Y of S-video, and for composite
Minimum/maximum levels ......... Analog: -15V to +15V p-p with no offset
Impedance ........................................ 75 ohms
Horizontal frequency ..................... 10 kHz to 2000 kHz
Vertical frequency ........................... 15 Hz to 180 Hz
Return loss
GLI 2000 5BNC ................... <-27dB @ 1 MHz to 100 MHz
GLI 2000 2BNC ................... <-28dB @ 1 MHz to 100 MHz
Video output
GLI 2000 5BNC ................... RGBHV, RGBS, RGsB, RsGsBs
GLI 2000 2BNC ................... 1 S-video or 2 composite video
Connectors
GLI 2000 5BNC ................... 5 female BNC
GLI 2000 2BNC ................... 2 female BNC
(-3dB) for HV
video
0.7V p-p for RGB
0.3V p-p for C of S-video
GLI 2000 Series • Specifications
5
Nominal level .................................. 1V p-p for Y of S-video, and for composite
Minimum/maximum levels ......... Analog: -15V to +15V p-p with no offset
Impedance ........................................ 75 ohms
Horizontal frequency ..................... 10 kHz to 2000 kHz
Vertical frequency ........................... 15 Hz to 180 Hz
Return loss........................................ <-30dB @ 0 to 100 MHz
DC offset ........................................... ±10 mV maximum
video
0.7V p-p for RGB
0.3V p-p for C of S-video
Sync — GLI 2000 5BNC unless otherwise indicated
Input type ......................................... RGBHV, RGBS, RGsB, RsGsBs
Output type ...................................... RGBHV, RGBS, RGsB, RsGsBs
Standards (GLI 2000 2BNC) .......... NTSC 3.58, NTSC 4.43, PAL, SECAM
Input level ........................................ -15V to +15V p-p
Output level ..................................... -15V to +15V p-p, unterminated
Input impedance ............................. 75 ohms
Output impedance .......................... 75 ohms
Max. propagation delay
GLI 2000 2BNC ................... 52 ns
GLI 2000 5BNC ................... 26 ns
Polarity .............................................. Positive or negative (follows input)
General
Power ................................................ Not powered
Temperature/humidity ................. Storage -40° to +158°F (-40° to +70°C) / 10%
Rack mount ...................................... Yes, with optional 2U rack shelf,
Enclosure type ................................. Metal
Enclosure dimensions
GLI 2000 5BNC ................... 3.4" H x 8.6" W x 5" D (2U high, half rack
GLI 2000 2BNC ................... 3.4" H x 4.3" W x 5" D (2U high, one quarter
to 90%, non-condensing
Operating +32° to +122°F (0° to +50°C) / 10%
to 90%, non-condensing
part #60-032-01
width)
8.6 cm H x 21.8 cm W x 12.7 cm D
rack width)
8.6 cm H x 10.9 cm W x 12.7 cm D
(Depth excludes connectors/guards and
handles.)
GLI 2000 Series • Specifications
6
Specifications, cont’d
Product weight
GLI 2000 5BNC ................... 6.2 lbs (2.8 kg)
GLI 2000 2BNC ................... 3.1 lbs (1.4 kg)
Shipping weight
GLI 2000 5BNC ................... 10 lbs (5 kg)
GLI 2000 2BNC ................... 5 lbs (3 kg)
Vibration ........................................... ISTA/NSTA 1A in carton (International Safe
Listings .............................................. UL, CUL
Compliances .................................... CE
MTBF ................................................. 30,000 hours
Warranty ........................................... 3 years parts and labor
Specifications are subject to change without notice.
Part Numbers
GLI 2000 5BNC ................................ 60-601-01
GLI 2000 2BNC ................................ 60-603-01
Optional Accessories
2U rack shelf .................................... 60-032-01
BNCM-RCAF adapter .................... 10-264-01
SVHSM-BNCF adapter .................. 26-353-01
SY 15 VGAM-RGBHVM 6' ............ 26-533-02
SY MAC/QUADRA 35 6' .............. 26-171-01
SU 13W3-61 ...................................... 26-241-01
Transit Association)
www.extron.com
Extron Electronics, USA
1230 South Lewis Street
Anaheim, CA 92805
USA
714.491.1500
Fax 714.491.1517
Extron Electronics, Europe
Beeldschermweg 6C
3821 AH Amersfoort
The Netherlands
+31.33.453.4040
Fax +31.33.453.4050
© 2005 Extron Electronics. All rights reserved.
Extron Electronics, Asia
135 Joo Seng Road, #04-01
PM Industrial Building
Singapore 368363
+65.6383.4400
Fax +65.6383.4664
Extron Electronics, Japan
Kyodo Building
16 Ichibancho
Chiyoda-ku, Tokyo 102-0082 Japan
+81.3.3511.7655
Fax +81.3.3511.7656
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