HDMI Mini vs HDMI Micro

So what's the difference between the HDMI mini connector and HDMI micro connector? Let's look at some of the specs.

HDMI Mini Connector:

- Type C HDMI
- 10.42 mm × 2.42 mm
- Defined in the HDMI 1.3 specification
- 19-pin configuration

HDMI Micro Connector:

- Type D HDMI
- 6.4mm x 2.8 mm
- Defined in the HDMI 1.4 specification
- 19-pin configuration

As you can see, they both employ the 19-pin configuration, but the Mini HDMI (Type C) is different because all positive signals of the differential pairs are swapped with their corresponding shield, the DDC/CEC Ground is assigned to pin 13 instead of pin 17, the CEC is assigned to pin 14 instead of pin 13, and the reserved pin is 17 instead of pin 14. The Micro (Type D) uses the same pin configuration as the standard HDMI (Type A).

Mini HDMI (Type C) to Standard HDMI (Type A) cables are generally used for connecting your HD camcorder to your HDTV.

Micro HDMI (Type D) to Standard HDMI (Type A) cables are used for connecting smart phones like the Motorola Droid X and Sprint HTC Evo to HDTVs.

Video shows the Motorola Droid X getting hooked up to an HDTV via the HDMI Micro cable:

How It's Made: Fiber Optic Cable

Corning has been a leading manufacturer of fiber optic cables since the beginning. State of the art test equipment and highly trained professionals ensure top quality fiber optic products. Take a look at the process involved in making, testing, and the history of fiber optic cable.



For more information, visit Fiber Optic Cable

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Glossary of Common Fiber Optic Terms
How To Make Fiber Optic Patch Cables... Kinda

What is Plenum Cable/Innerduct and When Do I Use it?

What is Plenum?

According to the National Electric Code (NEC) a plenum is a "compartment or chamber to which one or more air ducts are connected and [which] forms part of the air distribution system." To qualify as a plenum, the space above an acoustic tile ceiling would have to extend above other rooms in the same building or be open to ducts connecting it to other parts of the building. The concern is that during a fire, if there is burning material in a plenum air space, smoke and fumes can travel through air ducts to the whole building. For this reason, there are codes to restrict the types of materials (such as wiring) that can be placed in the plenum.

It's quite common to have an acoustic tile ceiling without having a plenum. If your room-dividing walls extend above the dropped ceiling and seal off the space above, you do not have a plenum air space and so may not require plenum-rated wires. You can lift up an acoustical tile in your room and peek in to see if your room has a plenum.

What is the code?

According to the National Electric Code (NEC), in plenum air spaces you must use plenum rated cables, also called Communications Plenum Cable (CMP). Plenum cable is only required when cable is installed in a plenum air space. Materials kept below the ceiling — including speaker wire, computer cables, telephone cords, etc. — do not need to be plenum rated according to the NEC.

Remember that even though the National Electric Code may allow non- plenum cable, the final decision is up to your local Fire Marshall. Most cities adopt the national codes as their own without revision, but some cities modify or expand them and require plenum-rated cable in all situations. Regardless of the code or its interpretation, your Fire Marshall makes the final decision. We recommend that you contact your Fire Marshall if you have questions.
http://www.firemarshals.org/links/state-fire-marshals-websites/

Why is the regulation for plenum air spaces but not for inside the classroom?

It's dangerous to inhale fumes from any burning material. Communications cable is no more dangerous than any other plastic item you would find below the ceiling in a typical classroom — computers, carpet, power cords, etc. Therefore, requiring the use of plenum wires within the classroom itself would have little impact. The regulation covers the area where it's most critical.

How is plenum cable and innerduct different from CRM/PVC?

The Plenum rated coating on wire burns at a much higher temperature and emits fewer fumes.

What does plenum wire look like?

Identifying this cable just by looking at it is hard to tell. It is very similar in look and feel, so you'll want to check the print on the jacket for the letters "CMP"

Who sets the guidelines?

The National Electrical Code (NEC) is a set of guidelines recommending procedures to reduce the risk of fires, electric shock and other hazards associated with electrical installations. The code is advisory in nature, but most state and local building departments across the country use the NEC as the basis for their own electrical codes. Some local codes may be more restrictive, so please check with your local Fire Marshall if you're unsure.

Is compliance with the locally-adopted code mandatory?

Yes. City, county or state codes are mandatory and enforceable as law.

Make sure you and your contractor are on the same page. When life has been lost in a fire a lawsuit is not out of the question if plenum wire has not been installed when it should have been.

Glossary of Common Fiber Optic Terms: R - Z

Common Fiber Terms A-E

Common Fiber Terms F-L

Common Fiber Terms M-P

Common Fiber Terms: R-Z

R:

Rack Panels
Framework or boxes to hold patch panels and other cable management devices.

Rayleigh Scattering
Scattering by refractive index fluctuations (inhomogeneities in material density or composition) that are small with respect to wavelength. Referred to as backscatter.

Receiver
A device which detects an optical signal, converts into an electronic form, then processes it further so it can be used by electronic equipment. From the standpoints of components, it can be viewed as a combination of detector and single processing electronics.

Receiver I.C.
Consists of photodiode which converts the signal to an elec­tronic one which feeds into an amplifier bringing the signal back to a level.


Receiver Sensitivity (expressed in dBm)
This tells how much optical power the photo-detector must receive to achieve a specified base band per­formance, such as a specified bit-error rate of signal-to-noise ratio.

Reflection
The abrupt change in direction of a light beam at an interface between two dissimilar media so that the light beam returns into the media from which it originated.

Refraction
The bending of a beam of light at an interface between two dissimilar media or in a medium whose refractive index is a continuous function of position (graded index medium).

Repeater (fiber optic)
A device which detects a weak signal in a fiber optic communication system, amplifies it, cleans it up, and retransmits it in optical form. Also known as a regenerator.

Return Loss
Expressed in negative value (-dB), this refers to the amount of back reflection. The lower the dB value, the better the connector and polish finish on the connector ferrule.

RF (Radio Frequency)
The frequency spectrum from 15kHz to 100GHz.

RFI (Radio Frequency Interference)
Electromagnetic radiation in the radio frequency spectrum fiom 15kHz to 100GHz. The best shielding material against RFI is copper and aluminum alloys. The term "EMI" should not be used in place of RFI since shielding materials for the entire electromagnetic frequency spectrum are not available.

Riser
Pathways for indoor cables that pass between floors. It is normally a vertical shaft or space. Also a fire-code rating for indoor cable.
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S:

Scattering
A property of glass that causes light to deflect from the fiber and contributes to optical attenuation.

Scribe Tool
Also called a cutting tool or breaking tool, consisting of cut­ting blade usually made from tungsten carbide or a diamond. Application is to break/scribe fiber @90? without lips or hackles or angular irregularities.

Selco Lenses
Segments of optical fibers specially designed to function as lenses.

Semi-Graded Index
An optical fiber with refractive index profile interme­diate between step-index and graded index. Strictly speaking, this might be considered a type of graded-index fiber with refractive index profile some­what steeper than normal.

Signal-to-Noise Ratio
The ratio of the power of the signal to that of background noise, usually measured in decibels. This is a common measure of the quality of analog electronics or transmission systems.

Simplex Cable
A single cable structure with a single fiber.

Singlemode
One type of low-loss optical waveguide with a very small Core (2-9 microns). It requires a laser source for input signals becauuse of the very small entrance aperture. The core diameter of a single-mode is designed to accept a one mode(wavelength) from the light source .

Skew Rate
A ray somethimes refered to as a dominant ray, that never intersects the axis of fiber while being internally reflected (in contrast with a meridional ray).

Splice
A permanent junction between two optical-fiber ends.

Splice Housing (Fiber Optics)
A housing designed to protect a splice in an optical fiber from damage by the environment, such as from the applica­tion of stress on the fiber. It also can seal the splice fiom environmental agents such as water which could cause it to deteriorate.

Star Coupler (fiber optics)
A coupler in which many fibers are brought together to a single optical element in which their signals are mixed. The mixed signals are then transmitted back through all the fibers. The name comes from the geometric arrangement

Step-Index
An optical fiber in which there is a discontinuous (step-function) change in refractive index at the boundary between fiber core and cladding. Such fibers have a large numerical aperture (light accepting angle), and are simple to connect. but have lower bandwidth than other types of optical fibers.

Stripper
Mechanical tool used to remove buffer coatings from fibers.

STTL
Standard TTL (see TTL)

Swage
To displace metal by pressure.

Switch (fiber optics)
A device for rerouting signals from one optical fiber into others.
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T:

Tap (fiber optic)
A coupler in which part of the light carried by one fiber is split off and inserted into another fiber, essentially the same as a Tee coupler.

Tee Coupler (fiber optic)
A fiber optic coupler in which three fiber ends are joined together, and a signal transmitted from one fiber is split between the other two. A conceptual drawing looks like the letter T, which accounts for the name.

Telecommunications Closet (TC)
An enclosed space for housing telecommunications equipment, cable terminations, and cross-connects. The closet is the recognized cross-connect between the backbone and horizontal cabling.

Termination tools
Tools used in preparing optical fibers for spliciug and/or installation of connectors.

Tight Buffered Cable
a protective coating extruded tightly over fiber for mechanical and environmental protection. The coating material is either nylon or PVC. This buffering offers excellent physical and flexing properties, but higher micro-bending sensitivity.

Time-Division multiplexing
A digital technique for combining two or more signals into a single stream of data by interleaving bits from each signal. Bit one might be from signal one, bit two from signal two, etc.

Total Internal Reflection
The total reflection that occurs when light strikes an interface at angles of incidence greater than the critical angle.

Transmitter (fiber optics)
A light source (LED or diode laser) which is combined with electronic circuitry to drive it. A transmitter operates directly from the signal generated by other electronic equipment to produce the drive current needed for LED or diode laser.
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W:

Wavelength-Division Multiplexing
Combination of two or more signals so they can be transmitted over a common optical path, usually over a single fiber; by a technique in which the signals are generated by light sources having different wavelengths. For example, one signal might be transmitted at 850 nanometers and a second at 1300 nanometers.

WDM
Wave Division Multiplexing. Multiplexing is done by combining different wavelengths over one optical fiber simultaneously. Each wavelength is capable of carrying a certain amount of information.

White Light
A mixture of colors of visible light that appears white to the eye. In theory, a mixture of three colors is sufficient to product white light.
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Z:

Zero-Dispersion Wavelength
Wavelength at which the chromatic dispersion of an optical fiber is zero. Occurs when waveguide dispersion cancels out material dispersion.

Glossary of Common Fiber Optic Terms: M - P

Common Fiber Terms A-E

Common Fiber Terms F-L

Common Fiber Terms: M-P

M:

Macrobending
In an optical fiber, all macro deviations of the axis from a straight line.

Material Dispersion
The dispersion associated with a non-monochromatic light source due to the wavelength dependence of the refractive index of a material or of the light velocity in this material.

Mating Sleeve
A mechanical media termination device designed to align and join fiber optic connectors of the same type. Often referred to as a coupling, bulkhead, or interconnect sleeve.

Mechanical Splicing
Joining two fibers together by permanent or temporary mechanical means (vs. fusion splicing or connectors)

Megahertz (MHz)
A unit of frequency that is equal to one million cycles per second.

Meridional Ray
A ray that passes through the axis of a fiber while being internally reflected (in contrast with a skew ray) and is confined to a single plane.

Microbending Loss
In an optical fiber, loss caused by sharp curvatures involving local axial displacements of a few micrometers and spatial wavelengths of a few millimeters. Such bends may result from fiber coating, cabling, packaging, installation, etc.

Micron
A unit of length equal to one-millionth (10 E-6) of a meter (same as a micrometer).

Modal Dispersion
Pulse spreading due to multiple light rays traveling different distances and speeds through an optical fiber.

Mode
A stable condition of oscillation in a laser. A laser can operate in one mode (singlemode) or in many modes (multimode). The theoretical underpinnings are extremely complex; the main practical implications are in beam quality.

Mode Changing
In a optical fiber, the exchange of power among modes.

Mode Conditioning Patchcord
a duplex multimode cord that has a small length of singlemode fiber at the start of the transmission leg. The basic principle behind the cord is that you launch your laser into the small section of single mode fiber. The other end of the singlemode fiber is cou­pled to multimode section of the cable with the core offset from the center of the multimode fiber. The laser light thus misses the "dip" and this new launch condition more closely mimics a standard LED launch. The bonus is that you still retain the speed advantages of using a laser.

Mode Filter
A device to remove high order modes to simulate equilibrium mode distribution in a short length of optical fiber.

Mode Scrambler
A device for inducing mode coupling in an optical fiber.

Modulation
Coding of information onto the carrier frequency. This includes amplitude, frequency, or phase modulation techniques.

Monomode
See Singlemode

Multifiber Cable
In general usage, a fiber optic cable which containsmany fibers which transmit signals independently and are housed in separate substructures within the cable or otherwise isolated from one another. This term is usually not applied to bundles of fibers which together transmit single signal.

Multimode
An optical waveguide with a relatively much larger core (commonly 50 to 62.5 micron) than the singlemode waveguide core (2 to 9 microns) and which permits approximately 1000 modes to propagate through the core compared to only one mode through a singlemode fiber.

Multiplexer
A device which combines two or more separate signals for transmission through a single fiber. Optical multiplexers combine signals at different wavelengths. Electronic multiplexers combine signals electronically before being converted into optical form.
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N:

Nanometer
One-Billionth of a meter (10 E-9) (same as a millimicrometer).

Non-Silica Glasses
A glass in which the primary constituent is a material other than silica (silicon dioxide). The term is sometimes applied to mean non-oxide glasses, those which do not contain oxide compounds. In fiber optics, some of these materials are used for fibers transmitting mid-infrared wavelengths.

Numerical Aperture
NA The numerical aperture of an optical fiber defines a characteristic of the fiber in terms of it's acceptance of light. The "degree of openess", "light gathering ability" and "acceptance cone" are all terms describing this characteristic.
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O:

OFNP
Optical Fiber, Non-conductive, Plenum rated.

OFNR
Optical Fiber, Non-conductive, Riser rated.

OM1 Fiber Classification (FDDI)
OM1 is legacy (FDDI) grade fiber originally designed for use with LEDs and tend to be 62.5/125 types.  OFL Bandwidth (LED) 850/1300nm (MHz.km) is 200 / 500.  

OM2 Fiber Classification (50/125)
OM2 fibers enable maintenance and extension to existing 50/125 cabling.  OFL Bandwidth (LED) 850/1300nm (MHz.km) is 500 / 500

OM3 Fiber Classification (10Gb/s)
OM3 fibers can support 10 Gb/s over 300 meters and are recommended for all new network builds for link distances up to 300 meters. OFL Bandwidth (LED) 850/1300nm (MHz.km) is 1500 / 500, and Effective Laser Launch Bandwidth at 850nm is 2000 mhz.km.  

Optical Attenuation Meter (Attenuator)
Device which measures the loss or Attenuation of an optical fiber, fiber optic cable, or a fiber optic system. Measurements generally are made in decibels.

Optical Break
The breaking of an optical fiber in such a way which predictably produces flattened surfaces that are perpendicular to the longitudinal axis of the fiber. Sometimes referred to as a mirror-like surface across the entire end surface.

Optical Return Loss (ORL)
a reflection that travels down the fiber back to the source. In high speed systems this is undesirable because it can interfere with the transmission. Also referred to as “back reflection”.

Optical Time Domain Refectometer (OTDR)
A method for characterizing a fiber via an optical pulse transmitted through the fiber. The resulting backscatter and reflections are measured as a function of time. The OTDR is useful in measuring attenuation, in distance and identification of defects and other losses.

Output Power (LED)
Radiant power expressed in watts.
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P:

Patch Panel
Flat strip of material with adapters for interconnections. Generally 6, 8, or 12 per panel. See Rack Panels

Patchcord
A length of cable with connectors at both ends. Also known as jumpers.

PE
Abbreviation used to denote polyethylene. A type of plastic material used for outside plant cable jackets.

Photodiode
A diode designed to produce photocurrent by absorbing light. Photodiodes are used for the detection of optical power and for the conversion of optical power into electrical power.

Pigtail
A short length of optical fiber with one connector on one end and no connector on the other end.

Pin Photodiode
A semiconductor diode light detector in which a region of intrinsic silicon separates the p and n materials. It offers particularly fast response and is often used in optic systems.

Plastic Clad SiIica (PCS)
A step index optical fiber in which a silica core is covered by a transparent plastic cladding of lower refractive index that of the core. The plastic cladding is usually a soft material, although hard-clad versions have recently been introduced. Offers good radiation resistance.

Plastic Fibers
Optical fibers in which both core and cladding are made of plastic material. Typically their transmission is much poorer than that of glass fibers, and their lowest losses are in the visible region.

Plenum
An air-handling space such as that found above drop-ceiling tiles or in raised floors. Also, a fire code rating for indoor cable.

Polarization-Maintaining Fiber
A singlemode optical fiber which maintains the polarization of the light which entered it, normally by including some birefringence within the fiber itself. Normal singlemode fibers, and all other types, allow polarization to be scrambled in light transmitted through them.

Polishing
A step in the connectorization process that creates a flat even surface on the ferrule face. Quality is measured in terms of back reflection reduction. Also referred to as “finish”

Polyethylene (PE)
A type of plastic material used for outside plant cable jackets.

Polyvinyl-chloride (PVC)
A type of plastic material used for cable jacketing. Typically used in flame-retardant cables.

Pulse Dispersion (pulse spreading)
The separation or spreading of the input characteristics of the optical signal that appears along the length of the optical fiber and limits the useful transmission bandwidth of the fiber. Expressed in time and distance a nanoseconds per kilometer. Three basic mechanisms for dispersion are the material effect, the waveguide effect, and the multimode effect.

Pulse Suppressor
A launching fiber used to take up the unmeasurable beginning (dead zone) of an OTDR.

PVC
Abbreviation used to denote polyvinyl-chloride. A type of plastic material used for cable jacketing. Typically used in flame-retardant cables.

PVDF
Abbreviation used to denote polyvinyldiflouride. A type of material used for cable jacketing. Often used in plenum-rated cables.

Common Fiber Terms R-Z