GLOSSARY - M
| Mean Time To Failure (MTTF) | the average time for a system to operate without developing a fault | | Mean Time To Repair (MTTR) | the average time taken to correct a fault in a system | | Menu | a list of selections | | Mesh | network topology in which every node can communicate directly with any other node | | Meshed VSAT | type of VSAT network in which connections are made directly between remote terminals; the hub in such a network is only responsible for signalling and network management | | Message switching | a telecommunications technique in which a message is received, temporarily stored, and then transmitted as network resources become available | | Microwaves | short wavelength radio waves with a frequency in the range 1 to 100 GHz | | Modem | a device used for sending data across an analogue telephony channel | | Modem | the modulator/demodulator block in an earth station | | Modulation | the process of superimposing a baseband signal on a carrier for transmission | | Modulator | a device which modulates a carrier | | Molinya orbit | inclined elliptical orbit used by some Soviet communications satellites; the orbit was designed so that the satellite is visible at high latitudes and yet only moves slowly across the sky for several hours each orbit making tracking simple | | Multifeed system | a consumer antenna system with two or more feeds and LNBs used to receive signals from two or more satellites | | Multiple access | technique whereby several users can, simultaneously or at different times, use a particular piece of repeater bandwidth | | Multiplexing | technique of combining several signals into a single signal for transmission |
|
