Click to go to firstpage
Fibridge Bejing
 Home  |  About Fibridge  |  Products  |  Clients  |  Support  |  Contact Us
 
Allen Avionics Products

Video Hum & Noise Eliminators

Single Channel Video Hum Eliminator
Models HEC-2000, HEC-2000-HEC-2000-V
, HEC-500, HEC-1000

 


HEC-3000


HEC-4000


HEC-5000

 
 
 
 

 

Which type is right for your application -

Hum vs. Noise…
What’s the Difference? Simply stated, for video application there is none. Hum eliminators and video noise eliminators only remove unwanted 50Hz. and 60Hz. signals from video cables.



HEC Series - Broadcast Quality - 1 to 5 channels

…work best in those circumstances where interference is caused by small differences in ground potential (less than 20 volts) or by induced currents in long cable runs. When there are multiple power panels in a building, or even on a single floor, equipment and lighting loads result in small differences in potential which induce ground loop current flow and 60Hz. hum.
Electromagnetically-induced currents in long cable runs also create hum. For 50Hz. and 60Hz. power systems, and where induced currents are high, the HEC-2000 and HEC-2000H increase the attenuation at the power frequency.
Should a small amount of hum remain after an HEC has been added to the circuit, a second HEC can be added in series, without significant degradation of the video signal.
      

 

VNE Series - Noise Eliminators for High Definition TV & Other High Frequency Bandwidth Applications

…are effective for video signals up to 30MHz---encompassing HDTV frequencies--- with little distortion. For signals below 20MHz, they are totally “transparent.” Since hum reduction, using VNEs, is not as great as with HECs, their use is recommended only where higher frequencies are involved.

Features

bullet

Flat Response

bullet

Bandwidths up to 30MHz

bullet

No Low or High Frequency Roll-Off

bullet

No Differential Gain or Phase Distortion

bullet

Rugged, Waterproof Case

bullet

BNC Connectors

bullet

Passive Device - Failure Free

bullet

For Color and Black & White

bullet

Reversible

bullet

Small, Compact Package

Applications
Field

bullet

Between Remote Truck, Telco & Microwave

bullet

For Intertruck Hookup

bullet

For VTR Units

bullet

For Monitoring Lines

Studio

bullet

Between Buildings

bullet

On Long Runs in Buildings

bullet

Between Studios & Transmitters

bullet

On Incoming & Outgoing Telco Circuits

 
Product Type Details Series Designation  

Model HD-SDI Ground Loop Eliminator  

SDI and HD-SDI Hum Eliminators
Stop potential hum interference with HD Serial Digital
(HD SDI SMPTE 292M)

SDI / HD-SDI

Printable pdf file

Video Hum Eliminators Single Channel, Multi-Channel, NTSC, RGB HEC - 500, 1000, 2000
HEC - 3000, 4000, 5000

printer friendly datasheet
HEC-500 thru 4000
HEC-2000
HEC-5000

Wide Bandwidth RGB Hum Eliminators 1 and 5 Channels
Bandwidth: 200 - 500 MHz, min.
GLE Series
50 and 75 Ohm Impedance

printer friendly
datasheet p1
p2

Video Noise Eliminators Single and Multi Channel VNE-75
VNE-75-3

printer friendly
datasheet

S-Video Hum Eliminator & Ground Loop Isolation Transformer for use with S-Video, SVHS, HI-8 and other Y/C Video formats
 
SVIT-75-H Isolation Transformer
SV-1000-H Hum Eliminator

printer friendly
datasheet p1
p2

Rack Mounting
for Hum & Noise Eliminators
Racks and Mounting Cards RMC and RMC-2

printer friendly
datasheet

Wide Bandwidth Ground Loop Eliminators
(Supports SDI transmission (SMPTE 259M).
High degree of common mode rejection at power frequencies (50Hz, 60Hz and 400Hz) while passing all frequencies from DC to over 300 MHz for the GLE-50 and GLE-75 and DC to over 500MHz

 


HEC-2000-H


HEC-3000

HEC-4000

HEC-5000
Impedance (Ohms) 50 Ohms
Unbalanced
75 Ohms
Unbalanced

75 Ohms
Unbalanced

75 Ohms
Unbalanced

Bandwidth DC to 30 MHz.
0.61 dB @ 10MHz.
1.00 dB @ 20MHz.
1.25 dB @ 30 MHz.
DC to 30 MHz.
0.75 dB @ 10 MHz.
1.20 dB @ 20 MHz.
1.50 dB @ 30 MHz.
DC to 30 MHz.
0.75 dB @ 10 MHz.
1.20 dB @ 20 MHz.
1.50 dB @ 30 MHz.
Hum Reduction

50 dB for 60 Hz. hum,
depending on system

60 dB for 50 Hz
or 60 Hz. hum,
depending on system

60 dB for 50 Hz
or 60 Hz. hum,
depending on system

Insertion Loss .2 dB max. .2 dB max. .2 dB max.
Return Loss 20 dB min. 20 dB min. 20 dB min.
Isolation Between Channels (Typical) N/A N/A N/A
Package Hi-Impact ABS Plastic Die Cast Metal Die Cast Metal
Mounting Four (4)
  8-32 x 1/2" Inserts
Four (4)
  6-32 x 1/2" Inserts
Four (4)
  6-32 x 1/2" Inserts

Dimensions:
ht. x width x depth

5-3/8" x 4" x 2" 4-11/16" x 3-11/16" x 2-1/16" 4-11/16" x 3-11/16" x 2-1/16"
Weight 2.5 lbs. 3-1/2 lbs. 3-1/2 lbs.
HEC-3000 HEC-4000 HEC-5000
Impedance: (Ohms)

75 Ohms
Unbalanced

GBR: Balanced
Sync Balanced

75 Ohms
Unbalanced

Bandwidth: DC to 30 MHz.
0.75 dB @ 10 MHz.
1.20 dB @ 20 MHz.
1.50 dB @ 30MHz.
GBR: DC to 30 MHz.
Sync: 20 Hz to 6 MHz
0.75 dB @10 MHz
1.00 dB @ 20 MHz
1.25 dB @ 30 MHz
DC-100 MHz
Hum Reduction: 60 dB for 60 Hz or 60 Hz hum, depending on system 60 dB for 60 Hz or 60 Hz hum, when used in GBR or YUV systems 60 dB Minimum per channel
Insertion Loss: 0.2 Db Max 0.2 Db Max 0.20 dB 100 KHz
0.30 dB @ 10 MHz
0.80 dB @ 30 MHz
1.20 dB @ 100 MHz
Return Loss: 20 dB Min 20 dB Min 20 dB Min
Isolation Between Channels (Typical) 70 dB 80 dB 70 dB
Package: Die Cast Metal Die Cast Metal Die Cast Aluminum
Mounting Four (4)
  6-32 x 1/2" Inserts
Four (4)
  6-32 x 1/2" Inserts
Four (4)
  6-32 x 1/2" Inserts

Dimensions
ht. x width x depth

7-7/16" x 4-3/4" x 3-1/16" 7-7/16" x 4-3/4" x 3-1/16" 7-7/16" x 4-3/4" x 3-1/16"
Weight 10 lbs. 7.5 lbs. 6 lbs.
 
   
   

Single Channel Video Hum Eliminator
Models HEC-2000H, HEC-2000-HEC-2000-V

Features

bullet

Flat Response

bullet

Bandwidths up to 30MHz

bullet

No Low or High Frequency Roll-Off

bullet

No Differential Gain or Phase Distortion

bullet

Rugged, Waterproof Case

bullet

BNC Connectors

bullet

Passive Device - Failure Free

bullet

For Color and Black & White

bullet

Reversible

bullet

Small, Compact Package

Applications

Field   
bullet

Between Remote Truck, Telco & Microwave

bullet

For Intertruck Hookup

bullet

For VTR Units

bullet

For Monitoring Lines

Studio
bullet

Between Buildings

bullet

On Long Runs in Buildings

bullet

Between Studios & Transmitters

bullet

On Incoming & Outgoing Telco Circuits

The HEC-2000-V now joins the line of single-channel Hum Eliminators manufactured by Allen Avionics. Like the HEC-2000 and the HEC-2000-H, the HEC-2000-V stops all 50 Hz and 60 Hz hum. The HEC-2000 Series is designed to eliminate hum in video applications caused by long cable runs or ground loops.

This new edition is a heavy-duty version, like the HEC-2000-H, and features 1/4" thick, stainless steel guard rails to protect the connectors when not in use.

With the addition of the HEC-2000-V to the HEC-2000-H, the end user has a choice of connector location and protection, plus the performance of the standard HEC-2000. The HEC-2000-H is designed for optional rack mounting installation.  (see below)

The HEC series works in circumstances where interference is caused by small differences in ground potential (less than 20 volts) or by induced currents in long cable runs. When there are multiple power panels in a building, or even a single floor, equipment and lighting loads resut in small differences in potential which induce a ground loop current flow and 60 Hz hum. (see Figure 1)

Electronically-induced current flows in long cable runs also create hum. For 50 Hz and 60 Hz power systems, and where induced currents are high, the HEC-2000, HEC-2000-H and HEC-2000-V increase the attenuation at the power frequency.

Should a small amount of hum remain after an HEC has been added to the circuit, a second HEC can be added in series, without significant degradation of the video signal..

Model Number HEC-2000, HEC-2000-H, HEC-2000-V Electrical Specifications
  • Impedance: 75 Ohms, Unbalanced 
  • Bandwidth: DC to 30 MHz
  • Insertion Loss:
    • 0.75 dB @ 10 MHz
    • 1.20 dB @ 20 MHz
    • 1.50 dB @ 30 MHz
  • Return Loss: 20 dB
  • Hum Reduction: 60 dB fo 50 Hz or 60 Hz systems
  • Packaging: Die Cast Metal
  • Mounting: Four (4) 6-32 x 1/2" inserts
  • Dimensions: See below
  • Weight: 3-1/2 Lbs.

Single Channel Video Hum Eliminator
Models HEC-500, HEC-1000

 

Features

bullet

Flat Response

bullet

Bandwidths up to 30MHz

bullet

No Low or High Frequency Roll-Off

bullet

No Differential Gain or Phase Distortion

bullet

Rugged, Waterproof Case

bullet

BNC Connectors

bullet

Passive Device - Failure Free

bullet

For Color and Black & White

bullet

Reversible

bullet

Small, Compact Package

Applications

Field   
bullet

Between Remote Truck, Telco & Microwave

bullet

For Intertruck Hookup

bullet

For VTR Units

bullet

For Monitoring Lines

Studio
bullet

Between Buildings

bullet

On Long Runs in Buildings

bullet

Between Studios & Transmitters

bullet

On Incoming & Outgoing Telco Circuits

 
Model Number HEC-500, HEC-1000 Electrical Specifications
  • Impedance Model HEC-500: 50 Ohms, Unbalanced 
  • Impedance Model HEC-1000: 75 Ohms, Unbalanced 
  • Bandwidth: DC to 30 MHz
    • 0.61 dB @ 10 MHz
    • 1.00 dB @ 20 MHz
    • 1.25 dB @ 30 MHz
  • Insertion Loss: 0.2 dB max.
  • Return Loss: 20 dB min.
  • Hum Reduction: 50 dB for 60 Hz hum depending on the system
  • Packaging: Hi-Impact ABS Plastic
  • Mounting: Four (4) 8-32 x 1/2" inserts
  • Dimensions: 5-3/8" x 4" x 2"
  • Weight: 3 Lbs.

 

 


 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
© Fibridge Australia Pty Ltd 2007 All rights reserved Tel 1300 088 099