| [ Also see: Bluetooth
IrDA/Infrared ZigBee
Wireless Resources ]
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Welcome to our section on wireless cameras, covering cameras,
transmitters, receivers, audio and regulatory issues.
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Glossary Of Common Terms
A bluffers guide to some common terms and acronyms...
| AGC |
Automatic Gain Control. Indicates whether or not the camera
automatically adjusts the 'gain' or amplification of a signal. |
| Audio |
Refers to whether the camera also includes a microphone and
outputs sound. Audio is usually provided by an RCA connector
from the camera (wired cameras) or from the receiver (wireless
cameras). |
| Band |
E.g. 900MHz / 1.2GHz / 2.4GHz / 5GHz. Most small wireless
cameras currently available are either 1.2GHz or 2.4GHz. Note
that note all bands can be legally used in all countries -
check your local regulations before purchasing! |
| B/W |
Black and White, Monochrome |
| CCD |
Charge Coupled Device |
| Channels |
Most 2.4GHz transmitters support 4 separate A/V channels,
typically ( 2.410 / 2.430 / 2.450 / 2.470 GHz ). This allows
four separate video and stereo audio signals to be transmitted
at once. |
| CMOS |
Complementary Metal Oxide Semiconductor |
| Effective Pixels |
The number of pixels that the camera can actually use for
video. Usually 628x582 for PAL or 510x492 for NTSC. |
| Image Area |
Refers to the physical size of the sensor the detects light
and converts it to electrical signals. 1/4" and 1/3"
are most common. Sharp and Sony are among the largest
manufacturer of sensor devices. |
| IP |
Internet Protocol. Many newer wireless cameras connect
directly to IP (WiFi) networks via an Access Point. This
provides a digital interface versus the traditional analogue
method. |
| Lowest Illumination |
The minimum light level the camera can use. Measured in Lux. |
| Range |
This refers to the distance a camera can send a signal to
the receiver. Factors that can affect this include transmitter
power, the type of antenna used, sensitivity of the receiver
and the location of the transmitter and receiver. |
| Receiver |
This refers to the device the picks up radio frequency (RF)
signals set by the transmitter. Typically the receiver decodes
the received radio waves into a composite video and/or audio
signal. |
| Resolution |
This refers to the number of horizontal lines supported by
the camera. More is better and means a sharper picture.
Typically 320 - 480 TVL (Television Lines) |
| RF Output |
The Radio Frequency power output of the device. Typical
small A/V output is 10mW - 500mW. Higher-output systems for
longer ranges are typically 1W - 2W. This is the amount of
Radio Frequency energy produced by the transmitter. |
| Scanning Frequency |
PAL/CCIR 50Hz, NTSC/EIA 60Hz |
| Sensitivity |
Refers to how large or small a signal the receiver can work
with. |
| PAL/NTSC |
PAL/CCIR 50Hz, 628x582 pixels or NTSC/EIA 60Hz, 510x492
pixels system. Many cameras, transmitters and receivers can
handle either PAL or NTSC, although some still handle only one
or the other. If in doubt, check with the manufacturer. NTSC
is mainly used in North America, PAL in Europe and
Australasia. |
| Power Consumption |
Device power consumption, typically in mW. The consumption
depends on several factors, including RF Output, on-board
lighting, etc. Most common devices operate between 8 and 12
volts. If in doubt check with the manufacturer. |
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Manufacturers of Cameras, Transmitters, Receivers
Useful sources for manufacturers, models and associated
equipment:
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Forums, Discussion Groups, News Lists
Groups and lists on wireless cameras, photography, surveillance
and related topics.
| Yahoo Groups |
SecurityandSurveillanceSystems
America's #1 Security and Surveillance Super Source. Video
Products for: Retail loss prevention, corporate security,
school / campus security, undercover journalism, employee
security, computer security and private investigation.
Biometric security systems, overt and Covert cameras, nanny
cams, wireless video, vcr's, quads, monitors, audio and video
surveillance products...
spycam-hiddencam
Sharing information about spy camera, hidden camera, nanny
cam, palm size DVR, etc. from all the leading manufacturers
worldwide. Also offering information where to buy, what to
buy, and how to buy the best value surveillance products.
Information seekers and providers in the surveillance area are
warmly welcomed to use this place. A right surveillance camera
can ensure you Peace of Mind, the Safety of Your Family, and
the Safety of Your Business...
cly Group
for high end users of computer and internet. Here we can share
our all kind of information about the computers internet and
all digital products. Just like mobile phones, digital
satellite products, VCR, CD Players, DVD players, in the
computer category graphics accelerators, TV tuners, sound
cards, multimedia speakers, Fax modems, wireless
communication, ...
cameratrack
How many 3/4 wedge and roster shots can you tolerate before
your head explodes? Pro-amature and professional railroad
photographers finally have a place to converse about artistic
styles, equipment, techniques, and how the fast-changing world
of photography relates to us. Members are assumed to have at
least a basic knowledge of photographic composition, exposure
control, film and/or digital equipment, and post-production
workflow... |
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