Radio transmission (Trivia)

Questions :

                

                
• Which digital transmission system is used by the firmen ?
                

                

  Acropol

  Antarès

  Acars

  Trunk

• By the Police ?

  Acropol
  Antarès
  Acars
  Trunk

• Which software allows you to establish radio contacts all over

the world via Internet ?

  Echolink
  Multipsk
  Radioraft
  eQSO

• Give the free frequency band that you can use in all Europe ?

 

  153,225 to 154,2125 MHz
  144,5 to 145,8 MHz
  446,00625 to 446,01875 MHz
  462,5625 to 467,7125 MHz

• What is the maximum transmission power you can have on free frequency band?

   100 mW
   500 mW
   4 W
  25 W

• Give the frequency band used by aviation?

• Which type of modulation is used by aviation?

  FM
  AM
  USB
  SSB

• What is the frequency of the channel E used to call the first aid in mountain

  159,200 MHz
  165,550 MHz
  444,600 MHz
  161,300 MHz

• Do you need a certificate to transmit on the channel E?

• What does QTH mean ?

• Which organization manages the attribution of the frequencies in France?

  A.D.R.A.S.E.C.
  ANFR
  ARCEP

• What’s the name of the new digital communication system used by the SNCF?

  GSM-R
  Tetra
  APRS
  GSM-Train

 

• What is the modulation used in new Tetra systems?

  GMSK
  8-PSK
  π/4 DQPSK
  BPSK

• Is it possible to decode some transmissions on a Tetra system?

•  What’s the name of the protocol which enable you to send pictures threw a radio network?

  SSTV
  RTTY
  APRS
  Packet

• How long does an image transfer take?

  10 min
  50 min
  15 sec
  2 min

• Does this protocol use analogical or digital modulation?

 

• Who still uses the Cibi today?

 

• What is the name of the protocol used to transmit instant alarm to the firemen?

 

• A “ricoré” antenna has more gain than an isotropic wifi antenna (true or false)?

 

• Which are the two principal methods used to locate a person (to locate a signal)?

 

• Quote two powerful types of antenna used in reception.