Module 9 Flashcards
How to communicate letters over radio
Phonetic alphabet
What is RST, scales of each
Readability, Strength, Tone
Readability 1-5
Strength 1-9
Tone (Morse/Data only) 1-9
What frequency range to use for local contacts
What frequency at Foundation will you have a conversation on
VHF and UHF
145.500 MHz
Steps to have a conversation on VHF
Tune to FM calling frequency of 145.00 MHz
Check its not in use by someone else
Call for specific callsign or call CQ
Once contact established, look for a free frequency
Listen to see if its in use, put out a call to double check, then go back to FM calling and send them to the new frequency
What do repeaters do
Who are they intended for
How many in UK
Common radio wavelengths
Extends range over a wide area and allows contact where signals may be blocked by obstacles
Handheld and mobile users
Over 500
2m or 70cm
How do repeaters work
What are some features they have
What do you need to program your radio with to use one
What should you not do with repeater frequencies
Have an input and output so they can transmit and receive at the same time
Only let in valid signals
Timeouts to cut down on long “overs”
Program radio with offset and a CTCSS tone
Use them for two way operation (use input and output frequencies for each)
What does CTCSS stand for
What are they
How do repeaters use them
How many types of tones are there in the UK and how are they identifed
Continuous Tone Coded Squelch System
Low frequency tone which is continuously transmitted as part of your audio
Repeaters only activate if they hear the correct tone, cuts down on interference
9 blocks, identified by letters
What types of digital voice/data modes are there
Are these different modes compatible?
What do you have to be careful of when using DV radios
D-Star
C4FM/Fusion
DMR
Not necessarily
Callsign is embedded in software so check when borrowing equipment
What do you have to remember when using a data mode?
Involves connecting your radio to a computer
Make sure the radios push to talk is set correctly
The audio signal levels in and out are set correctly
What should you not do when trying to contact the ISS?
Don’t transmit on downlink frequencies
What time should you use for your log?
What is not acceptable to transmit?
What should you do if you hear any of this?
UTC
Music and offensive or threatening language
Don’t respond or confront them, if abuse is persistent keep a log
