Technical Information
Did you know? (Tech Info Explained)
We are all too familiar with the amount of Technical ‘Jargon’ relating to Wireless Communication equipment! We have all looked at a Specification Sheet and thought this must be in another language. Never fear! Help is at hand as in this section we will explain & compare technical information for you!
Our vision is to use this section as a Help Desk for explaining Industry Standards, Equipment Specifications (what they really mean) and our sharing our test results having compared ‘like for like’ equipment; for example CCTV Cameras – Do they really perform to what they say on paper?
If you are currently comparing Digital Radio equipment, need to improve on a CCTV Camera on your premises, want to link two buildings & scratching your head over options – please contact us 0115 9522777.
Glossary of terms:
CODEC - This can be hardware or software but with CCTV this usually refers to a Hardware device which converts an analogue CCTV picture into a digital(IP) signal.
DVR - Digital Video Recorder
FDMA - Frequency Division Multiple Access. Not as clever as TDMA. This allows for a split of your channel (frequency) into two parts allowing two FDMA base stations to share the same channel although either two aerials or an aerial combiner would be required.
H264 - A new video compression standard starting to be used more and more. This is better than MPEG4 and MPEG2.
MPEG4 - A video compression standard commonly used today.
NTSC - National Television Standard Committee. This is the analogue video standard as used in the USA.
NVR - Network Video Recorder
PAL - Phase Alternating Lines. This is the analogue video standard used today in the UK and some other countries.
TDMA - Time Division Multiple Access. An example of this in use would be digital radio. As you talk on a radio your voice is digitally captured for say 100mS. It is then compressed and sent to the other radio in just 50mS (one time division). At the other end the audio is uncompressed and played out of the speaker lasting the original 100mS. This now means we can send two signals through the same base station seemingly at the same time - magic!