Checkpoint: T4B — HAM Trainer

T4B01 What is the effect of excessive microphone gain on SSB transmissions?

A Frequency instability B Distorted transmitted audio C Increased SWR D Sideband inversion

T4B02 Which of the following can be used to enter a transceiver's operating frequency?

A The keypad or VFO knob B The CTCSS or DTMF encoder C The Automatic Frequency Control D All these choices are correct

T4B03 How is squelch adjusted so that a weak FM signal can be heard?

A Set the squelch threshold so that receiver output audio is on all the time B Turn up the audio level until it overcomes the squelch threshold C Turn on the anti-squelch function D Enable squelch enhancement

T4B04 What does an FM signal sound like when received slightly off frequency?

A The audio increases in pitch B The audio decrease in pitch C There is no effect except for reduction in amplitude D The audio becomes distorted

T4B05 What does the scanning function of an FM transceiver do?

A Checks incoming signal deviation B Prevents interference to nearby repeaters C Tunes through a range of frequencies to check for activity D Tunes through a range of frequencies to determine the antenna's resonant frequency

T4B06 Which of the following controls could be used if the voice pitch of a single-sideband signal returning to your CQ call seems too high or low?

A The AGC or limiter B The bandwidth selection C The tone squelch D The RIT or Clarifier

T4B07 What is a DMR "code plug"?

A An adapter cable used to connect a DMR radio to a computer for internet access B Configuration data loaded onto your radio to access repeaters and talkgroups C An upgrade to DMR programming software provided by the radio manufacturer to accommodate new radio models D A Coder-Decoder (CODEC) that converts analog voice data to DMR digital data and vice versa

T4B08 What is the advantage of having a choice of receiver filter bandwidths in a multimode transceiver?

A Permits monitoring several modes simultaneously by selecting a separate filter for each mode B Permits noise or interference reduction by selecting a bandwidth matching the mode C Increases the number of frequencies that can be stored in memory D Increases the amount of offset between receive and transmit frequencies

T4B09 How is a specific group of stations selected on a DMR digital voice transceiver?

A By retrieving the frequencies from transceiver memory B By enabling the group's CTCSS tone C By entering the group's identification code D By inserting a five-pin, pre-programmed code plug

T4B10 Which of the following receiver filter bandwidths provides the best signal-to-noise ratio for SSB reception?

A 500 Hz B 1000 Hz C 2400 Hz D 5000 Hz

T4B11 Which of the following must be programmed into a D-STAR digital transceiver before transmitting?

A Your call sign B Your output power C The codec type being used D All these choices are correct