Technician - pretest Flashcards
(259 cards)
0
Q
regulating Agency united states
A
FCC
1
Q
Ham radio intended for
A
Solely personal aim
2
Q
FCC ham rules
A
Part 97
3
Q
Definition telecomand
A
One way transmission
4
Q
Recommends channels for aux and repeaters
A
Frequency coordinator
5
Q
Station transmits from remote to repeater
A
Auxiliary station
6
Q
ITU
A
United Nations
7
Q
North American ITU region
A
2
8
Q
6 meter band
A
52.525
9
Q
146.52
A
2 meter band
10
Q
70 cm technician ITU 2 frequency
A
443.350
11
Q
23 cm technician frequency
A
1296
12
Q
Modes permitted at 50 to 50.1 and 144 to 144.1
A
CW only
13
Q
Single letter used for
A
Event
14
Q
Valid US call
A
w3abc
15
Q
When foreign transmission allowed
A
Authorized
16
Q
If Interfering with radiolocation outside US
A
Stop operating
17
Q
Term for license
A
10 years
18
Q
Grace period
A
2 years
19
Q
Countries prohibited
A
Any notified ITU
20
Q
Equipment sale
A
Not regular basis
21
Q
Authorized broadcasting, program production
A
Immediate safety
22
Q
Meaning of broadcasting
A
Reception by public
23
Q
Communications Permitted
A
Adjustments
24
Must control operator
Transmitting
25
Who designates operator
Station Licensee
26
Determines transmitting privileges
Class of control operator
27
Who Controls transmitting handheld
Local
28
Control indirectly adjustments
Remote
29
FCC presumes control operator
Station licensee
30
ID for race HQ
Tactical call
31
How often give call sign
10 min
32
Must give call sign
10 min and end
33
Station ID language
English
34
Call sign for phone transmission
CW or phone
35
Restrictions for self assigned call
Must not conflict
36
When technician in exclusive extra class segment
Never
37
Station that retransmits on another frequency
Repeater
38
Who accountable for transmit violation
Control operator originating station
39
club members required
4
40
FM simplex 70cm
446.000
41
Repeater frequency offset 70 cm
5 mhz
42
Response to CQ
Other call sign - your call sign
43
To do test transmission
ID transmitting station
44
CQ means
Any station
45
Transmitting and receiving on same frequency
Simplex
46
Sub-audible with normal voice to open squelch
CTCSS
47
Deviation of FM signal
Just amplitude
48
Increase deviation FM
Occupies more bandwidth
49
ID when using phone
Call sign in CW and voice
50
Q sig for interference
QRM
51
Q sig for changing frequency
QSY
52
Rules for ham
FCC
53
Races and Ares
Emergencies
54
Min disruptions emergency net
Wait til asked to transmit
55
Most important job
Passing message exactly
56
When safety gives authorization
Normal not available
57
Polarization for long dist weak CW and SSB VHF and UHF
Horizontal
58
Antennas opposite end VHF or UHF line of site not same polarization
Significantly weaker
59
Rapid fluttering from mobile
Picket fencing
60
Type of wave used
Electromagnet
61
Skip reflections between earth and ionosphere
Polarization of signal is randomized
62
Propagation over multiple paths
Errors increase
63
Enables propagation
Ionosphere
64
Distance of 1 radio cycle
Wavelength
65
Times per sec AC reverses direction
Frequency
66
2 components of radio wave
Electric and magnetic
67
Radio wave speed
Speed of light
68
Relationship of length to frequency
Inverse
69
Formula frequency to wavelength in meters
300 divided by frequency MHz
70
How to identify frequency bands
Approximate wavelength
71
Frequency limits VHF
30 to 300 MHz
72
Frequency range HF
3 to 30 MHz
73
Why non repeated UHF only local
Not reflected by ionosphere
74
When VHF signals found long distance usually because
Refracted from sporadic E layer
75
Characteristic of VHF auroral reflection
Rapid fluctuations of strength and sound distorted
76
Propagation types of strong over-horizon signals on 10, 6, and 2 meter
Sporadic E
77
Knife-edge propagation
Partially refracted around solid objects showing sharp edges
78
Meteor scatter band
6 meters
79
Tropospheric ducting cause
Temp inversions
80
Best time for long distance 10 meter
Daylight
81
Why UHF and VHF beyond line of sight
Seems less curved to radio
82
Replacement for speaker
Headphones
83
Filter location for harmonic emissions
Transmitter and antenna
84
Best conductor for RF grounding
Flat strap
85
To reduce RF on the shield of audio cable
Ferrite choke
86
Varying High pitched whine
Alternator
87
Connect mobile power negative
Battery or engine ground strap
88
To enter operator frequency
Keypad or VFO knob
89
Favorite frequency access
Memory channel
90
Reduce ignition interference
Noise blanker
91
Receive filter for SSB
2400 Hz
92
Receive filter for CW
500 Hz
93
Repeater offset
Diff between transmit and receive
94
Power
Watts
95
Electron flow
Current
96
Current in one direction
DC
97
Force (EMF) that causes electron flow
Voltage
98
Mobile transceiver voltage
12 volts
99
Good conductor
Copper
100
Good insulator
Glass
101
Rate electric used
Power
102
Elec force unit
Volt
103
1.5 amp
1500 milli
104
1,500,000 Hz
1500 kHz
105
Kilovolt
1000 volts
106
Microvolt
1 millionth of volt
107
500 milliwatts
0.5 watts
108
3000 milliamper current
3 ampers
109
3.525 MHz
3525 kHz
110
1,000,000 picofarads
1 micro
111
Change in dB 5 watts to 10 watts
3 dB
112
Change in dB decrease 12 watts to 3 watts
6 dB
113
Change dB 20 watts to 200 watts
10 dB
114
Unit of capacitance
Farad
115
Ability to store magnetic
Inductance
116
Unit inductance
Henry
117
Unit frequency
Hz
118
All radio signals
RF
119
Waves in space
Radio
120
Power used 12 volts and current 2.5 amp
30 watts
121
Amperes in 12 volts and load 120 watts
10 amps
122
Current (I) =
Voltage (E) / Resistance (R)
123
Resistance (R) =
Voltage (E) / current (I)
124
3amp current thru resistor connected to 90 volts = ? Resistance
30 ohms
125
Applied voltage 12 volts and current 1.5 amp = ? Resistance
8 ohms
126
Circuit draws 4 amps from 12 volt source
3 ohms
127
Voltage 120 and 80 ohm resistance = ? Current flow
1.5 amp
128
100 ohm resistor and 200 volts =? Current
2 amp
129
24 ohm resistor and 240 volts = ? Current
10 amp
130
2 ohm resistor and 0.5 amp current = ? Voltage
1 volt
131
10 ohm resistor and 1 amp current = ? Voltage
10 volts
132
10 ohm resistor and 2 amp current = ? Voltage
20 volts
133
Component to oppose DC current
Resistor
134
Adjustable volume control device
Potentiometer
135
Parameter controlled by potentiometer
Resistance
136
2 or more conductive surfaces separated by an insulator
Capacitorw
137
Component that stores energy in magnetic field
Inductor
138
Component composed of coil of wire
Inductor
139
Component to connect/ disconnect electrical circuits
Switch
140
Components used to protect components from current overloads
Fuse
141
Nominal voltage of nickel cadmium cell
1.2 volts
142
Batter type not rechargeable
Carbon zinc
143
Class of components Uses voltage or current signal to control flow
Transistors
144
Allows flow in only one direction
Diode
145
Used as switch or amplifier
Transistor
146
Can amplify signals
Transistor
147
To identify diode's cathode lead
A stripe
148
LED means
Light emitting diode
149
FET means
Field effect transister
150
Semiconductor component with emitter electrode
Bipolar transistor
151
Transistors ability to amplify a signal is called
Gain
152
Standardized representations of components
Schematic symbols
153
Study pages 11-43 thru11-47
L
154
Changes an AC into varying DC signal
Rectifier
155
Used to display signal strength on a numerical scale
Meter
156
Controls amount of voltage from power supply
Regulator
157
Used to change 120v AC to lower AC
Transformer
158
Used as visual indicator
LED
159
Used with inductor to make tuned circuit
Capacitor
160
Combines several semiconductors and other components into one package
Integrated circuit
161
Common use of coax
Carry RF between radio and antenna
162
Function of product detector
Detect CW and SSB signals
163
11-48 thru 11-50
.
164
Function of mixer in superheterodyne receiver
Shift incoming signal to intermediate frequency
165
Takes output of low powered 28 MHz SSB and produces 222 MHz signal
Transverter
166
Combines speech signal and RF carrier
Modulator
167
Most useful for VHF weak signal communication
Multi-mode VHF transceiver
168
Increases low power output from a handheld transceiver
RF power amplifier
169
Demodulates FM signals
Discriminator
170
Ability to discriminate between multiple signals
Selectivity
171
Where is RF preamplifier installed
Between antenna and receiver
172
What is fundamental overload in reference to a reciever
Interference caused by very strong signals
173
1st step to cure telephone frequency interference
RF filter at the telephone
174
BER means
Bit error rate
175
Instrument to determine antenna resonance at the desired operating frequency
Antenna analyzer
176
Standing wave ratio (SWR) means
How well load matches a transmission line
177
SWR perfect impedance between antenna and feed line
1 to 1
178
Max SWR before solid state transmitters protection circuits reduce transmitter power
2 to 1
179
SWR of 4 to 1 means
impedance mismatch
180
Power lost in feed line
Converted to heat.
181
Most common cause of coax failure
Moisture contamination
182
Instrument for measuring electric potential or electromotive force
Voltmeter
183
Way to connect voltmeter to a circuit
Parallel with the circuit
184
How is ammeter connected to a circuit
Series with a circuit
185
Measures electric current
Ammeter
186
Used to measure resistance
Ohmmeter
187
Measured with multimeter
Voltage and resistance
188
Solder for radio equipment
Rosin-core
189
Cold solder joint appearance
Grainy or dull
190
Precautions when measuring circuit resistance with ohmmeter
Circuit is not powered
191
form of amplitude modulation
Single side band
192
Modulation used for VHF packet radio transmission
FM
193
Voice modulation used for long-distance or weak signal contacts on VHF and UHF bands
SSB
194
Modulation used for VHF and UHF voice repeaters
FM
195
Emmission with narrowest bandwidth
CW
196
Sideband used for 10 meter HF, VHF, and UHF
Upper sideband
197
Advantage of SSB over FM for voice transmission
SSB have narrower bandwidth
198
Bandwidth of SSB voice signal
3khz
199
Bandwidth of VHF repeater FM phone signal
Between 5 and 15 kHz
200
Bandwidth of analog fast-scan tv transmission of 70 cm band
6 MHz
201
Max bandwidth to transmit CW
150 hz
202
Who can contact international space station on 2 meter and 70 meter
Technician or higher
203
What is U/V mode
Uplink is 70 cm and downlink is 2 meter
204
Cause of spin fading
Rotation of satellite
205
What is LEO
Low earth orbit
206
Method of signaling digital satellite
FM packet
207
Useful for a hidden transmitter hunt
Directional antenna
208
Contacting as many stations as possible
Contesting
209
Contest strategy
Minimum info
210
A grid locator is
Letter-number designator assigned to geographic location
211
Purpose of "1 by 1" call sign
Activity of special significance
212
Max power allowed for telecommand to radio controlled models
1 watt
213
On-air station ID substitute for radio control models
Label with licensee name, call sign, address affixed to the transmitter
214
To Obtain active nodes using VoIP
Repeater directory
215
Device connecting stations to Internet
Gateway
216
Used to send auto location reports via radio
GPS
217
NTSC
Analog fast scan color tv signal
218
Technician class modes between 219 and 220
Data
219
PSK
Phase shift keying
220
PSK31
Low- rate data transmission
221
Beam antenna
One direction
222
Vertical antennas
Perpendicular to earth
223
To make dipole resonate on higher frequency
Shorten it
224
Quad, Yagi, and dish
Directional antennas
225
Approx length of a quarter-wavelength vertical antenna for 146 MHz
19 inches
226
Length of 6 meter 1/2 wavelength wire dipole antenna
112 inches
227
Strongest radiation direction of half-wave dipole in free space
Broadside to the antenna
228
Value of low SWR in antenna with coax feed line
Efficient transfer of power and low loss
229
Impedance of common coax
50 ohm
230
Connector best for frequencies above 400 MHz
Type N
231
As frequency of signal increases in coax
Loss increases
232
Why should coax connectors be sealed against weather
To prevent increase in feed line loss
233
Cause of erratic changes in SWR
Loose connection in antenna feed line
234
What electrical difference exists between smaller Rg-58 and larger RG-8 coax
8 has less loss at a given frequency
235
Feed line with lowest loss at VHF and UHF
Air insulated hard line
236
Lowest voltage to cause dangerous shock
30 volts
237
Green wire =
Safety ground
238
Fuse does
Interrupt overload
239
Why not install 20-amp fuse for 5 amp fuse
Could cause fire
240
Caution for lightening protection in coax cable feedline
Ground all to common plate which is connected to external ground
241
To recharge 12-volt lead acid battery if power out
Use car battery
242
12-volt battery hazard
Explosive gas if not vented
243
When installing ground wires on a tower for lightening protection
Short and direct connections
244
Before climbing antenna tower
Harness and safety goggles
245
When putting up tower
Watch for power lines
246
Gin pole for?
Lift tower sections or antennas
247
When using crank-up tower
Never climb unless fully retracted
248
Proper grounding method for a tower
Separate 8 foot ground rods for each leg bonded to tower and each other
249
Don't attach antenna to utility pole because
High- voltage power lines
250
Grounding conductors used for lightening protection
Avoid sharp bends
251
Grounding requirements for tower or antenna
Electrical codes
252
Frequency with lowest max exposure limit
50 MHz
253
Max power level station may use at VHF frequencies before RF exposure evaluation required
50 watts PEP at the antenna
254
Touch antenna
RF burn
255
To prevent RF exposure
Relocate antenna
256
Ensuring compliance with RF safety regs
Re-evaluate when equipment changed
257
Why duty cycle considered
Affects average exposure to radiation
258
Duty cycle?
Ratio of on-air time to total operating time of signal
