T8B Concepts and types of modulation: CW, phone,
RTTY and data
emission
types; FM deviation
T8B01
@T8A04
What is
the name for packet-radio emissions?
A. CW
B. Data
C. Phone
D. RTTY
T8B02
@T8A06
What is
the name of the voice emission most used on VHF/UHF repeaters?
A. Single-sideband phone
B. Pulse-modulated phone
C. Slow-scan phone
D. Frequency-modulated phone
T8B03
@T8A08
What is
meant by the upper-sideband (USB)?
A. The part of a single-sideband signal that is
above the carrier
frequency
B. The part of a single-sideband signal that is
below the carrier
frequency
C. Any frequency above 10 MHz
D. The carrier frequency of a single-sideband
signal
T8B04
@N8A06
What
does the term "phone transmissions" usually mean?
A. The use of telephones to set up an amateur
contact
B. A phone patch between amateur radio and the
telephone system
C. AM, FM or SSB voice transmissions by
radiotelephony
D. Placing the telephone handset near a
transceiver's microphone and
speaker
to relay a telephone call
T8B05
@N8A07
How is
an HF RTTY signal usually produced?
A. By frequency-shift keying an RF signal
B. By on/off keying an RF signal
C. By digital pulse-code keying of an
unmodulated carrier
D. By on/off keying an audio-frequency signal
T8B06
@N8A11
What
are two advantages to using modern data-transmission techniques
for
communications?
A. Very simple and low-cost equipment
B. No parity-checking required and high
transmission speed
C. Easy for mobile stations to use and no
additional cabling required
D. High transmission speed and communications
reliability
T8B07
@N8A05
Which
sideband is commonly used for 10-meter phone operation?
A. Upper sideband
B. Lower sideband
C. Amplitude-compandored sideband
D. Double sideband
T8B08
@N8B11
What
can you do if you are told your FM hand-held or mobile
transceiver
is over-deviating?
A. Talk louder into the microphone
B. Let the transceiver cool off
C. Change to a higher power level
D. Talk farther away from the microphone
T8B09
@N8B12
What
does chirp mean?
A. An overload in a receiver's audio circuit
whenever CW is received
B. A high-pitched tone that is received along
with a CW signal
C. A small change in a transmitter's frequency
each time it is keyed
D. A slow change in transmitter frequency as
the circuit warms up