The BBE Opto Stomp Compressor guitar effects pedal offers you a soft-knee design that yields transparent control of dynamics and very musical compression reminiscent of the classic designs of the best vintage optical-element compressors of the '50s and '60s. Other features include LED compression indicator, non-slip rubber bottom, easy-access 9V battery compartment and included external power supply.
The BBE Opto Stomp Compressor guitar effects pedal offers you a soft-knee design that yields transparent control of dynamics and very musical compression reminiscent of the classic designs of the best vintage optical-element compressors of the '50s and '60s. Other features include LED compression indicator, non-slip rubber bottom, easy-access 9V battery compartment and included external power supply.Vintage optical limiterSoft-knee compression perfect for acoustic-electric instruments, basses, and guitarsLED compression indicatorOutput and ThreshoId controlsTrue hard-wire bypassPowered by 9V battery or included external power supply
The BBE Opto Stomp Compressor guitar effects pedal offers you a soft-knee design that yields transparent control of dynamics and very musical compression reminiscent of the classic designs of the best vintage optical-element compressors of the '50s and '60s. Other features include LED compression indicator, non-slip rubber bottom, easy-access 9V battery compartment and included external power supply.Vintage optical limiterSoft-knee compression perfect for acoustic-electric instruments, basses, and guitarsLED compression indicatorOutput and ThreshoId controlsTrue hard-wire bypassPowered by 9V battery or included external power supply
This level of sonic integrity has been reserved for the kilo-buck price range, until now. In the spirit of classic OPTO compressors, the 7802 Stereo Opto Tube Compressor is a unique hybrid design of vacuum tube and transformer circuitry combined with modern, high performance components. The 7802 compressor offers smooth, open, full bandwidth compression, while imparting a pleasant, subtle glow to your tracks. The silky attack is achieved via electro-optical circuitry, followed by a robust tube makeup gain stage. Final perfection is presented via the transformer balanced outputs. Read this comment from Martin Feveyear - Producer/Mixer, Jupiter Studios, Seattle (Brandi Carlile, REM, Queens of the Stone Age, Blue Scholars, The Saturday Knights, Duff McKagan's Loaded, Mark Lanegan): "Please please please don't make me give this thing back..... It can be a soft and slow lover just like you want your classic Opto to be, or it can be a quick, dirty and grabby little mistress that colours up the party. The only Opto Compressor that I would strap across a mix." What Makes Chameleon Labs Different? Chameleon Labs is a new type of company, focused on delivering performance and value at a price previously thought impossible. How do they do it? By reinventing how global manufacturing is approached. Chameleon Labs engineers are not inexperienced kids in a garage, buying products that are designed and built in China. Chameleon Labs is comprised of audio professionals with many decades of experience in high-end pro audio gear. From its inception seven years ago, they pioneered the idea of "blended technology", using top-notch parts from the US, UK, and Europe combined with low-cost metalwork and assembly from China. This combination enables a superior performance level at a low price point. Every Chameleon Labs product is first created and engineered here in the U.S. The goal is to achieve a specific sound through tedious testing in major U.S. recording studios and listening to numerous tracks and/or mixes with a very specific sonic target in mind. A new design must impress the best and brightest of our evaluation group before it ever reaches the factory floor.Two channel opto-isolator/tube-based compression Stereo linkable channels Vactrol optical electronics Hand selected 12AX7 tubes Five position attack/release selector Two position ratio switch (2:1 and 4:1) HPF switch for compressor side chain (6dB/octave roll off, 3dB down @ 90Hz) Drive control to adjust the amount of tube overdrive Output control to set the overall output level LED metering of input and clip levels VU metering of compression XLR balanced inputs XLR transformer balanced outputs Internal power supply One year warranty
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Troubleshooting Your Optical Fiber Networks: Introduction to OTDR - Optical Time Domain Reflectometer
How Does an OTDR Work?
In fiber optic networks, OTDR (Optical Time Domain Reflectometer) is an opto-electronic instrument used to characterize an optical fiber. OTDR is both the best known and least understood fiber optic instrument.
OTDR does not measure loss, but instead implies it by looking at the backscatter signature of the fiber. It does not measure cable plant loss that can be correlated to power budgets.
An OTDR injects a series of optical pulses into the fiber under test. It also extracts, from the same end of the fiber, light that is scattered back and reflected back from points in the fiber where the index of refraction changes. This working principle works like a radar or sonar, sending out a pulse of light from a very powerful laser, that is scattered by the glass in the core of the fiber. The intensity of the return pulses is measured and integrated as a function of time, and is plotted as a function of the fiber length.
An OTDR may be used for estimating the fiber's length and overall attenuation, including splice and mated-connector losses. It may also be used to locate faults, such as breaks.
Physical Limitations of OTDR Testing
The OTDR suffers from several serious uncertainties in measurement and physical limitations. The measurement uncertainties come primarily from the variations in backscatter of the fiber. The backscatter coefficient is a function of the material properties of the glass in the core and the diameter of the core.
Variations of the fiber materials or geometry can cause major changes in the backscattered light, making splice or connector measurements uncertain by as much as +/-0.4dB. This has often led to confusion by showing a virtual gain at a connector, where the fibers involved have different backscatter coefficients. Connector or splice loss must be measured from both directions and averaged to remove this source of error.
OTDR Design
The principle optical components in a simple standard OTDR include a laser, a receiver, a coupler and a front-panel connector.
A laser is pigtailed to a connector on the OTDR through a 3dB optical coupler. This coupler is typically a fused bidirectional device but may also be made of discrete optical components.
The laser fires short, intense bursts of light that are directed through the coupler and then out through the front-panel connector and into the fiber under test.
As the pulse travels along the fiber, some of the light is lost via absorption and Rayleigh scattering. The pulse is also attenuated at discrete locations, such as splices, connectors, and bends, where local abrupt changes in the waveguide geometry couples light out the core and into the cladding. When the pulse encounters discontinuities in the index of refraction (such as those found in connectors or the cleaved end of a fiber), part of the pulse's optical energy is reflected back toward the OTDR.
The Applications of Pulse Suppressors
Pulse suppressors, also referred to as OTDR launch boxes, delay lines or "Dummy Fibers" are used to occupy OTDR "dead zones" which enables accurate loss measurements on near end connections of the fiber under test. Suppressors may also be used in an educational setting to simulate networks and during installation and troubleshooting.
With the inclusion of additional loss points, the pulse suppressor becomes a test box or quick verification of your OTDR's calibrated accuracy.
