home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Precision Software Appli…tions Silver Collection 1
/
Precision Software Applications Silver Collection Volume One (PSM) (1993).iso
/
tutor
/
arsg10.exe
/
ARSGDAT.3BD
< prev
next >
Wrap
Text File
|
1992-10-04
|
9KB
|
396 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.
;
;
;
(3BD-1.5)
Which wires in a four conductor line cord should be attached to
fuses in a 234-VAC primary (single phase) power supply?
A. Only the "hot" (black and red) wires
*
(3BD-1.6)
What size wire is normally used on a 15-ampere, 117-VAC
household lighting circuit?
A. AWG number 14
*
(3BD-1.7)
What size wire is normally used on a 20-ampere, 117-VAC
household appliance circuit?
D. AWG number 12
*
(3BD-1.8)
What could be a cause of the room lights dimming when the
transmitter is keyed?
C. A drop in AC line voltage
*
(3BD-1.9)
What size fuse should be used on a #12 wire household appliance
circuit?
D. Maximum of 20 amperes
*
(3BD-2.4)
What safety feature is provided by a bleeder resistor in a power
supply?
B. It discharges the filter capacitors
*
(3BD-3.1)
What kind of input signal is used to test the amplitude
linearity of an emission J3E transmitter while viewing the
output on an oscilloscope?
C. Two audio-frequency sine waves
*
(3BD-3.2)
To test the amplitude linearity of an emission J3E transmitter
with an oscilloscope, what should the audio input to the
transmitter be?
C. Two audio-frequency sine waves
*
(3BD-3.3)
How are two-tones used to test the amplitude linearity of an
emission J3E transmitter?
C. Two non-harmonically related audio tones are fed into the
microphone input of the transmitter, and the output is observed
on an oscilloscope
*
(3BD-3.4)
What audio frequencies are used in a two-tone test of the
linearity of an emission J3E transmitter?
D. Any two audio tones may be used, but they must be within the
transmitter audio passband, and should not be harmonically
related
*
(3BD-3.5)
What can be determined by making a two-tone test using an
oscilloscope?
D. The amplifier linearity
*
(3BD-4.1)
How can the grid-current meter in a power amplifier be used as a
neutralizing indicator?
A. Tune for minimum change in grid current as the output circuit
is changed
*
(3BD-4.2)
Why is neutralization in some vacuum tube amplifiers necessary?
D. To cancel oscillation caused by the effects of interelectrode
capacitance
*
(3BD-4.3)
How is neutralization of an RF amplifier accomplished?
C. By supplying energy from the amplifier output to the input
shifted 180 degrees out of phase
*
(3BD-4.4)
What purpose does a neutralizing circuit serve in an RF
amplifier?
B. It cancels the effects of positive feedback
*
(3BD-4.5)
What is the reason for neutralizing the final amplifier stage of
a transmitter?
B. To eliminate parasitic oscillations
*
(3BD-5.1)
How can the output PEP of a transmitter be determined with an
oscilloscope?
B. Measure peak load voltage across a resistive load with an
oscilloscope, and calculate, using PEP = [(0.707 PEV) (0.707
PEV)]/RL
*
(3BD-5.5)
What is the output PEP from a transmitter when an oscilloscope
shows 200-volts peak-to-peak across a 50 ohm resistor connected
to the transmitter output terminals?
A. 100 watts
*
(3BD-5.6)
What is the output PEP from a transmitter when an oscilloscope
shows 500-volts peak-to-peak across a 50 ohm resistor connected
to the transmitter output terminals?
B. 625 watts
*
(3BD-5.7)
What is the output PEP from an N0N transmitter when an
average-reading wattmeter connected to the transmitter output
terminals indicates 1060 watts?
B. 1060 watts
*
(3BD-6.1)
What item of test equipment contains horizontal and vertical
channel amplifiers?
D. The oscilloscope
*
(3BD-6.2)
What types of signals can an oscilloscope measure?
A. Any time-dependent signal within the bandwidth capability of
the instrument
*
(3BD-6.3)
What is an oscilloscope?
D. An instrument that displays signal waveforms
*
(3BD-6.4)
What can cause phosphor damage to an oscilloscope cathode ray
tube?
B. Too high an intensity setting
*
(3BD-9.1)
What is a signal tracer?
C. A device for detecting signals in a circuit
*
(3BD-9.2)
How is a signal tracer used?
A. To detect the presence of a signal in the various stages of a
receiver
*
(3BD-9.3)
What is a signal tracer normally used for?
D. To identify an inoperative stage in a radio receiver
*
(3BD-10.1)
What is the most effective way to reduce or eliminate audio
frequency interference to home entertainment systems?
B. Install bypass capacitors
*
(3BD-10.2)
What should be done when a properly-operating amateur station is
the source of interference to a nearby telephone?
B. Contact a phone service representative about installing RFI
filters
*
(3BD-10.3)
What sound is heard from a public address system when audio
rectification occurs in response to a nearby emission J3E
transmission?
C. Distorted speech from the transmitter's signals
*
(3BD-10.4)
How can the possibility of audio rectification occurring be
minimized?
C. By ensuring all station equipment is properly grounded
*
(3BD-10.5)
What sound is heard from a public address system when audio
rectification occurs in response to a nearby emission A3E
transmission?
A. Audible, possibly distorted speech from the transmitter
signals
*
(3BD-12.2)
What is the reason for using a speech processor with an emission
J3E transmitter?
D. A properly adjusted speech processor improves signal
intelligibility at the receiver
*
(3BD-12.3)
When a transmitter is 100% modulated, will a speech processor
increase the output PEP?
B. No
*
(3BD-12.4)
Under which band conditions should a speech processor not be
used?
C. When the frequency in use is clear
*
(3BD-12.5)
What effect can result from using a speech processor with an
emission J3E transmitter?
D. A properly adjusted speech processor improves signal
intelligibility at the receiver
*
(3BD-13.1)
At what point in a coaxial line should an electronic T-R switch
be installed?
A. Between the transmitter and low-pass filter
*
(3BD-13.2)
Why is an electronic T-R switch preferable to a mechanical one?
C. Higher operating speed
*
(3BD-13.3)
What station accessory facilitates QSK operation?
D. Electronic TR switch
*
(3BD-14.6)
What is an antenna noise bridge?
B. An instrument for measuring the impedance of an antenna or
other electrical circuit
*
(3BD-14.7)
How is an antenna noise bridge used?
C. It is connected between a receiver and an unknown impedance
and tuned for minimum noise
*
(3BD-15.1)
How does the emitted waveform from a properly-adjusted emission
J3E transmitter appear on a monitoring oscilloscope?
B. A waveform that mirrors the input waveform
*
(3BD-15.2)
What is the best instrument for checking transmitted signal
quality from an emissions A1A/J3E transmitter?
A. A monitor oscilloscope
*
(3BD-15.3)
What is a monitoring oscilloscope?
B. A device used to observe the waveform of a transmitted signal
*
(3BD-15.4)
How is a monitoring oscilloscope connected in a station in order
to check the quality of the transmitted signal?
D. Connect the transmitter output to the vertical-deflection
plates of the oscilloscope
*
(3BD-17.2)
What is the most appropriate instrument to use when determining
antenna horizontal radiation patterns?
A. A field strength meter
*
(3BD-17.3)
What is a field-strength meter?
C. A device for monitoring relative RF output
*
(3BD-17.4)
What is a simple instrument that can be useful for monitoring
relative RF output during antenna and transmitter adjustments?
A. A field-strength meter
*
(3BD-17.5)
When the power output from a transmitter is increased by four
times, how should the S-meter reading on a nearby receiver
change?
B. Increase by approximately one S-unit
*
(3BD-17.6)
By how many times must the power output from a transmitter be
increased to raise the S-meter reading on a nearby receiver from
S-8 to S-9?
C. Approximately 4 times
*