LEN Ltd

LEN is the UK’s leading specialist in passive signal enhancement. Wherever a signal requires to be transmitted, enhanced, cleaned, split or combined, LEN has the expertise and products to assist.

We are renowned leaders in signal technology and UK leading specialists in passive signal enhancement. We have particular expertise with cable clones. Our cable clones range now extends to include full 3G capability. It has similar attenuation v. frequency characteristics to coax cable over the wide frequency spectrum of the serial digital signal. 

The cable clone sets are easily stored and carried round in a typical toolbox. They require no power.

Passive Signal Enhancement

For all passive signal enhancement requirements, we are the source. We are UK leading specialists in passive signal enhancement. Whether you need to split, combine, isolate or switch your digital or analogue signal, our products have the bandwidth and performance to exceed your expectations.

We offer the complete range of passive filtering solutions from baseband to over 1000 MHz. Our standard products include all of the traditional video filters and delay lines, as well as many standard IF bandpass designs. Our unique approach to ceramic filter design and manufacture gives optimal, repeatable performance and allows us to meet our customers' strict tolerances.

Wherever a signal requires being transmitted, enhanced, cleaned, split or combined, we have the solutions.

  • Signal distribution
  • Video and RF filters
Passive Signal Enhancement

Ground Isolators

We specialise in ground isolators. The 3G Ground Isolator uses a broadband highpass filter to provide DC electrical isolation, while permitting the full bandwidth of the 3G-SDI signal to pass. This method outperforms all other broadband transformers for SDI signals currently available.

Also known as the 3G-SDI DC Isolation Highpass Filter, it is non-inverting and suitable for ASI format. The video isolation transformer acts as both a hum eliminator and a ground isolator while also improving the performance of the traditional individual products. The VIT01 will remove severe interference caused by 50 or 60 Hz hum, while a normal 'Humbucker' will only remove moderate interference.

At the same time it acts as a Ground Isolator eliminating ground potential differences between equipment with a minimal phase and gain distortion.

Ground Isolators

Splitters

We offer a variety of options in splitters. The 3G, SD and HD splitters are suited for additional monitor feeds, remote camera locations and situations where size and weight are integral factors, such as racing cars, bikes and other sporting and research applications.

In addition, the SD splitter is designed to split signals up to 360 MHz. It is ideal for permanent installation in a studio as well as for temporary situations.

The HD Splitter creates two broadcast quality signals from one input, covering all formats up to and including HD. All connections are on the same face, ideal for permanent installations.

Splitters

Bandpass Filters

We specialise in bandpass filters. We are the only dedicated video to RF filter and delay line manufacturer in the UK. A particular speciality is bandpass filters and diplexer design using LC or ceramic resonator components.

Quality and reliability remain at the heart of what we do. This approach has enabled us to build long standing, worldwide relationships with customers in the broadcast TV, communications and defence sectors.  We have recently delivered a range of innovative solutions including: group delay correction, amplitude equalisation, phase matching, arithmetically symmetrical bandpass filters and more.

As you would expect, our production and test facility is equipped with state-of-the-art production tools and Vector Network Analysers, enabling us to produce batch quantities for smaller, bespoke orders, as well as larger requirements.

Bandpass Filters

Relays

We are suppliers of market leading relays.

The LEN serial digital video relay range provides full broadcast quality switching, for all data rates up to 540 MBit SD-SDI, 1485 MBit HD-SDI and 3 GBits/sec. They are ideal for applications such as power failure switching, where a local SD-SDI, HD-SDI or SDI source is automatically switched in on failure of an incoming signal from a remote source.

Relays

Video Isolation Transformer

Our top of the range video isolation transformer is both a hum eliminator and a ground isolator with improvements over the single products. This video isolation transformer will eradicate severe interference from 50/60 Hz.

The VIT02 also acts as a high performing ground isolator eliminating the differences between equipment with a minimal gain distortion and phase. The VIT02 was developed for medical applications requiring high breakdown voltages.

Video Isolation Transformer

3G Ground Isolator

Our 3G Ground Isolator uses a highpass broadband filter to give a DC electrical isolation between equipment.

This is achieved while still allowing the full bandwidth of the 3D-SDI signal to pass. This allows our 3G Ground Isolator to perform better than all other broadband transformers for SDI signals. It is also non-inverting and can be used for ASI format.

3G Ground Isolator

3G Relay

The LEN serial digital video 3G Relay provides full broadcast quality switching, for all data rates up to 3GBs/sec.

This 3G Relay is ideal for applications such as power failure switching, where a local SDI source is automatically switched in on failure of an incoming SDI signal from a remote source.

3G Relay

Analogue Humbucker

We have experience in the broadcast field, stretching back many years to the analogue days. We still have a significant customer base for our ranges of PAL/NTSC Analogue Isolation Transformers and Analogue Humbucker products.

Further to the Analogue Humbucker, new products are continually being developed. As the market moves towards 3G, there is a constant challenge to keep up with increasingly high standards.

Analogue Humbucker

Medical Imaging Solutions

We are able to supply our own designs of products that combine the increasingly demanding image quality with precise safety standards.

  • SD SDI Splitter, also for ASI
  • HD SDI Galvanic video and ground path isolator, 4kV breakdown
  • 3G SDI Galvanic Video and ground path isolator, 4kV breakdown
  • 1U rack Frame for mounting up to 16 off LxxGI 02 series Galvanic Isolators

For more information please contact us!

Email : info@len.co.uk

Tel : +44 (0) 1270 886157

    Medical Imaging Solutions

    3G HD, SDI Video & RF Products

    LEN Limited is the World leader in the bespoke and standard design, manufacture and supply of 3G HD SDI products, high spec RF filters for the Broadcast Video, Splitters Relays Isolators & Cable Clones for Broadcast Video.

    Two decades of designing and manufacturing SDI equipment has ensured our range of SD, HD and 3G spliters, filters, relays & cable simulators combine the proven reliability of passive parts with the performance required in the most demanding of  environments. That's why LEN products are also the first choice for military, emergency services and medical applications.

    • Broadcast Film and Video 
    • 4K/12G Products
    • Imaging Lenses and Filters
    • Medical Equipment
    • Video Relays - SD, HD, 3G SDI
    • Video Hum Eliminators Cable Clone – both range offer 10.20,40 or 80 with specific length of 1694A cable.
    • Video Isolation Transformers - Analogue
    • Power Injectors and Strippers - Power and video over co-ax
    • Ceramic Filters and Diplexers
    • 3G HD & SDI Video Splitters
    • Galvanic "Ground" Isolators
    • Imaging Systems
    3G HD, SDI Video & RF Products

    Ceramic Filters

    LEN offer a unique approach to Ceramic Filter design and manufacture gives maximum re occurring performance and allows us to meet customer’s strictest demands. We have a complete range of designs including bandpass, bandstop, notch and mulitplexers. Strong relationships with innovative Ceramic Filters and Resonator suppliers allow us to provide high quality Ceramic Filter solutions from 100 MHz upwards.

    LEN provides a full prototyping design service and engineering consultancy;

    • Solutions tailored to your requirements
    • Specialist “one-off” production facility
    • In house design and engineering
    Ceramic Filters

    Defense Solutions

    LEN Ltd bespoke RF & Microwave products are used extensively in military, emergency services and commercial applications. Focusing on frequencies below 1 GHz, we design and supply lowpass, highpass, bandpass, bandstop, notch, diplexer and multiplexer filters. Many of these filters use low-loss Coaxial Ceramic Resonator technology, enabling small size and light weight with good temperature stability and NVH or rugged environmental performance. Options include amplitude / phase / delay correction or pre-distortion.

    LEN also has extensive experience in the design and manufacture of Broadcast Analogue and Digital Video products. Many broadband satellite links such as video use our ceramic bandpass filters in their IF stages. 

    Defense Solutions

    Custom Broadcast Video Products 3G HD, SDI

    LEN offers many standard and bespoke Broadcast Video designs for SD, HD and 3G products including HD signal splitters, ground path isolators, SDI relays & the famous Cable Clone range. LENS's product range combines the reliability of passive parts with the high performance required in the ever demanding environment.

    • 3G HD SDI Galvanic video ground path isolator, In Line / Tubular Model
    • HD SDI Relay
    • HD SDI Splitter
    • 3G HD SDI Galvanic Ground Isolator, In Line Model Panel Mount Type
    • 4K/12G SDI VIDEO Galvanic isolator (barrel style)
    • HD SDI Galvanic Ground Isolator, In Line model Panel Mount Type
    • HD SDI Ground Isolator
    • HD SDI Galvanic video and ground path isolator, 4kV breakdown
    • Ceramic Bandpass Filters
    • Analogue PAL/NTSC Transformers & Humbuckers
    • 3G HD SDI Relay
    • SDI Signal & Ground Path Isolators
    • Cable Clones for Broadcast Video
    • HD SDI Passive Video Splitter
    Custom Broadcast Video Products 3G HD, SDI

    Contact Us

    LEN Limited

    Radway Green Venture Park
    Radway Green
    Crewe
    Cheshire
    CW2 5PR
    England
    United Kingdom

    Email: please use our contact form
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    Contact Us

    LEN Ltd Overview

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