The Extron GLI 350 Ground Loop Isolator is an active solution that eliminates hum bars and common mode noise caused by improper equipment grounding in video systems. It features RGsB, RGBS, and RGBHV inputs and outputs on female BNC connectors, as well as a rugged, metal enclosure.

The GLI 350 is designed for applications that experience ground loop and interference problems, such as those found in convention centers, hotels, or other large buildings. These occur when separate grounds, carrying different loads, are "looped" together by sources and displays within an AV system, resulting in hum bars — 50- or 60-cycle noise. Hum bars can be described as thick background bars rolling vertically through the displayed image. This problem is most common when a projector and its signal source(s) are powered from two different power-ground systems that are separated by significant distance. One solution is to have all system components powered from the same ground, but this is not always a possible or cost-effective solution. The GLI 350 can save hours of troubleshooting and unnecessary rewiring by providing electrical isolation for systems where it is impractical to connect all equipment to the same ground — stopping the loop and virtually eliminating hum bars and common mode noise caused by improper grounding in video systems.

Specifications

GLI 350 Ground Loop Isolator
Video
Gain	Unity
Bandwidth	350 MHz (-3 dB)
CMRR	>47 dB @ 60 Hz, >30 dB @ 10 MHz
Video input
Number/signal type	1 VGA-QXGA RGBHV, RGBS, RGsB, component video, S-video, composite video
Connectors	5 female BNC
Nominal level	1 Vp-p for Y of component video and S-video, and for composite video 0.7 Vp-p for RGB and for R-Y and B-Y of component video 0.3 Vp-p for C of S-video
Minimum/maximum levels	Y and composite video: 0.3 V to 1.5 Vp-p
Impedance	75 ohms
Horizontal frequency	15 kHz to 135 kHz
Vertical frequency	30 Hz to 150 Hz
Return loss	<-39 dB @ 5 MHz
DC offset (max. allowable)	0.2 V
Video output
Number/signal type	1 VGA-QXGA RGBHV, RGBS, RGsB, component video, S-video, composite video
Connectors	5 BNC female
Nominal level	1 Vp-p for Y of component video and S-video, and for composite video 0.7 Vp-p for RGB 0.3 Vp-p for R-Y and B-Y of component video, and for C of S-video
Minimum/maximum levels	Y and composite video: 0.3 V to 1.5 Vp-p (follows input)
Impedance	75 ohms
Return loss	<-45 dB @ 5 MHz
DC offset	±10 mV maximum
Sync
Input type	RGBHV, RGBS, RGsB
Output type	RGBHV, RGBS, RGsB
Input level	0.5 V to 5.0 Vp-p
Output level	0.6 Vp-p for component video (tri-level sync) TTL: 5.0 Vp-p, unterminated for RGB
Input impedance	510 ohms
Output impedance	75 ohms
Max. propagation delay	H: 60 ns
V: 226 ns
Max. rise/fall time	4 ns
Polarity	RGBHV, RGBS: positive or negative RGsB: negative
General
External power supply (attached)	100 VAC to 240 VAC, 50/60 Hz, 6 watts; to 9 VDC, 1 A, regulated
Temperature/humidity	Storage: -40 to +158 °F (-40° to +70°C) / 10% to 90%, noncondensing Operating: +32 to +122 °F (0° to +50°C) / 10% to 90%, noncondensing
Rack mount	No
Enclosure type	Metal
Enclosure dimensions	1.8" H x 4.6" W x 4.7" D (1U high, quarter rack wide) 4.6 cm H x 11.7 cm W x 11.9 cm D (Depth excludes connectors.)
Product weight	1.9 lbs (0.9 kg)
Shipping weight	4 lbs (2 kg)
Vibration	ISTA 1A in carton (International Safe Transit Association)
Compliances	CE
MTBF	30,000 hours
Warranty	3 years parts and labor
NOTE    All nominal levels are at ±10%.
NOTE    Specifications are subject to change without notice.
(7.52-052507-D5)