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ARSGDAT.4BH
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1992-10-04
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8KB
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344 lines
;/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\:
; :
; AMATEUR RADIO STUDY GUIDE v1.00 :
; :
; Copyright (c) 1992 David Drzyzga - All Rights Reserved :
; :
; Based on a program coded in BASIC by Russ Revels :
; :
;/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\:
;
; You can include comments an the file anywhere you want
; just like these comments. You cannot put a comment in
; the middle of a line though.
;
; When modifying this file, there are several things you
; must be aware of:
;
; -> Any line of text in this file cannot exceed 65 characters!
; this is the 65th character^
;
; No harm will be done, but nothing over 65 characters will
; be read by the program.
;
; -> Do not make questions more than 20 lines long, or you
; will receive an 'out of memory' error when you execute
; the program.
;
; -> You can add or delete questions as you please, just be
; sure to follow the format of the existing questions.
;
;
;
(4BH-1A.1)
In a pulse-width modulation system, what parameter does the
modulating signal vary?
A. Pulse duration
*
(4BH-1A.2)
What is the type of modulation in which the modulating signal
varies the duration of the transmitted pulse?
C. Pulse-width modulation
*
(4BH-1B.1)
In a pulse-position modulation system, what parameter does the
modulating signal vary?
D. The time at which each pulse occurs
*
(4BH-1B.2)
Why is the transmitter peak power in a pulse modulation system
much greater than its average power?
A. The signal duty cycle is less than 100%
*
(4BH-1B.3)
What is one way that voice is transmitted in a pulse-width
modulation system?
C. A standard pulse is varied in duration by an amount depending
on the voice waveform at that instant
*
(4BH-2A.1)
What digital code consists of elements having unequal length?
D. Morse code
*
(4BH-2B.1)
What digital communications system is well suited for
meteor-scatter communications?
C. Packet radio
*
(4BH-2B.2)
The International Organization for Standardization has developed
a seven-level reference model for a packet-radio communications
structure. What level is responsible for the actual
transmission of data and handshaking signals?
A. The physical layer
*
(4BH-2B.3)
The International Organization for Standardization has developed
a seven-level reference model for a packet-radio communications
structure. What level arranges the bits into frames and
controls data flow?
B. The link layer
*
(4BH-2C.1)
What is one advantage of using the ASCII code, with its larger
character set, instead of the Baudot code?
C. It is possible to transmit upper and lower case text
*
(4BH-2D.1)
What type of error control system does Mode A AMTOR use?
D. The receiving station automatically requests repeats when
needed
*
(4BH-2D.2)
What type of error control system does Mode B AMTOR use?
A. Each character is sent twice
*
(4BH-2E.1)
What is the duration of a 45-baud Baudot RTTY data pulse?
D. 22 milliseconds
*
(4BH-2E.2)
What is the duration of a 45-baud Baudot RTTY start pulse?
B. 22 milliseconds
*
(4BH-2E.3)
What is the duration of a 45-baud Baudot RTTY stop pulse?
C. 31 milliseconds
*
(4BH-2E.4)
What is the primary advantage of AMTOR over Baudot RTTY?
B. AMTOR includes an error detection system
*
(4BH-2F.1)
What is the necessary bandwidth of a 170-Hertz shift, 45- baud
Baudot emission F1B transmission?
B. 250 Hz
*
(4BH-2F.2)
What is the necessary bandwidth of a 170-Hertz shift, 45- baud
Baudot emission J2B transmission?
B. 249 Hz
*
(4BH-2F.3)
What is the necessary bandwidth of a 170-Hertz shift, 74- baud
Baudot emission F1B transmission?
B. 278 Hz
*
(4BH-2F.4)
What is the necessary bandwidth of a 170-Hertz shift, 74- baud
Baudot emission J2B transmission?
B. 278 Hz
*
(4BH-2F.5)
What is the necessary bandwidth of a 13-WPM international Morse
code emission A1A transmission?
C. Approximately 52 Hz
*
(4BH-2F.6)
What is the necessary bandwidth of a 13-WPM international Morse
code emission J2A transmission?
C. Approximately 52 Hz
*
(4BH-2F.7)
What is the necessary bandwidth of a 1000-Hertz shift, 1200-
baud ASCII emission F1D transmission?
D. 2400 Hz
*
(4BH-2F.8)
What is the necessary bandwidth of a 4800-Hertz frequency shift,
9600-baud ASCII emission F1D transmission?
A. 15.36 kHz
*
(4BH-2F.9)
What is the necessary bandwidth of a 4800-Hertz frequency shift,
9600-baud ASCII emission J2D transmission?
A. 15.36 kHz
*
(4BH-2F.10)
What is the necessary bandwidth of a 5-WPM international Morse
code emission A1A transmission?
C. Approximately 20 Hz
*
(4BH-2F.11)
What is the necessary bandwidth of a 5-WPM international Morse
code emission J2A transmission?
C. Approximately 20 Hz
*
(4BH-2F.12)
What is the necessary bandwidth of a 170-Hertz shift, 110- baud
ASCII emission F1B transmission?
B. 314 Hz
*
(4BH-2F.13)
What is the necessary bandwidth of a 170-Hertz shift, 110- baud
ASCII emission J2B transmission?
B. 314 Hz
*
(4BH-2F.14)
What is the necessary bandwidth of a 170-Hertz shift, 300- baud
ASCII emission F1D transmission?
C. 0.5 kHz
*
(4BH-2F.15)
What is the necessary bandwidth for a 170-Hertz shift, 300- baud
ASCII emission J2D transmission?
C. 0.5 kHz
*
(4BH-3.1)
What is amplitude compandored single sideband?
C. Single sideband incorporating speech compression at the
transmitter and speech expansion at the receiver
*
(4BH-3.2)
What is meant by compandoring?
A. Compressing speech at the transmitter and expanding it at the
receiver
*
(4BH-3.3)
What is the purpose of a pilot tone in an amplitude compandored
single sideband system?
A. It permits rapid tuning of a mobile receiver
*
(4BH-3.4)
What is the approximate frequency of the pilot tone in an
amplitude compandored single sideband system?
D. 3 kHz
*
(4BH-3.5)
How many more voice transmissions can be packed into a given
frequency band for amplitude compandored single sideband systems
over conventional emission F3E systems?
B. 4
*
(4BH-4.1)
What term describes a wide-bandwidth communications system in
which the RF carrier varies according to some predetermined
sequence?
D. Spread spectrum communication
*
(4BH-4.2)
What is the term used to describe a spread spectrum
communications system where the center frequency of a
conventional carrier is altered many times per second in
accordance with a pseudo-random list of channels?
A. Frequency hopping
*
(4BH-4.3)
What term is used to describe a spread spectrum communications
system in which a very fast binary bit stream is used to shift
the phase of an RF carrier?
B. Direct sequence
*
(4BH-5.1)
What is the term for the amplitude of the maximum positive
excursion of a signal as viewed on an oscilloscope?
D. Peak positive voltage
*
(4BH-5.2)
What is the term for the amplitude of the maximum negative
excursion of a signal as viewed on an oscilloscope?
D. Peak negative voltage
*
(4BH-6A.1)
What is the easiest voltage amplitude dimension to measure by
viewing a pure sine wave signal on an oscilloscope?
A. Peak-to-peak voltage
*
(4BH-6A.2)
What is the relationship between the peak-to-peak voltage and
the peak voltage amplitude in a symmetrical wave form?
B. 2:1
*
(4BH-6A.3)
What input-amplitude parameter is valuable in evaluating the
signal-handling capability of a Class A amplifier?
A. Peak voltage
*