Hey, I took the #$%@ quiz and it thinks I'm borderline
- got an 85. Of course, I didn't see any warning
that I should have a formula sheet and calculator
onhand - it sure would have helped.
I didn't
like that it doesn't even tell you which questions
you get right or wrong. Just a score at the end.
I'd like to know how anyone got the 147 scores?
My guess is taking it multiple times under different
names.
Anyway, I did screen captures on
each question just so I could have a record to check
myself. Here they are for your study period prior
to taking the quiz.
Anyone care to give us
all your choices for the answers - showing your
solutions gets you extra credit.
QUIZ #1
If a 10MHz modulated signal is transmitted
on a 2GHz carrier frequency, what is the best fit
for the minimum sample rate rate required to demodulate
the signal?
A: 30MSa/s
B: 10MSa/s
C: 2GSa/s
D: 5GSa/a
This type of antenna is capable
of being used at more than one frequency band due
to the presence of a parallel LC network:
A:
Dummy antenna
B: Loop antenna
C: Isotropic
antenna
D: Trap antenna
What is 2 RADAR
miles?
A: 10.7us
B: 12.4us
C: 21.3us
D. 24.7us
What would be the smallest
and most efficient aperture for a slot antenna radiation
of a 2GHz signal?
A: 6 inches
B: 12 inches
C: 0.5m
D: 3 inches
A 0.5m stub (monopole)
antenna over an infinite ground plane will be resonant
at what fundamental frequency?
A: 300 MHz
B: 150 MHz
C. 600 MHz
D: 75MHz
What is the condition that would BEST indicate a
Receiver Selectivity problem?
A: Two transmitters
of similar modulation received into the same antenna
amplifier and filter section.
B: An increase
in the noise floor impacting C/N ratio of the desired
signal.
C: An out-of-channel signal that is able
to force the receiver LNA into compression thus
impacting sensitivity.
D: A high level signal
in channel that prevents desired signals from being
received.
What is the voltage gain from
1 uV to 0.1 V?
A: 140 dB
B: 70 dB
C: 100
dB
D: 50 dB
An antenna is assumed
to be matched when
A: Impedance is approximately
equal to 50 ohms.
B: SWR (standing wave ratio)
equals approximately 0.
C: Impedance is equivalent
to free space impedance.
D: Antenna impedance
is purely resistive.
What is the average
power of a pulsed signal with the following characteristics:
(PRF = 1 kHz, PW = 1 us, Peak Power = 100 kW)?
A: 1 W
B: 10 W
C: 100 W
D: 1 kW
Is the PRF (Pulse Repetition Frequency) of a
puls is 5 kHz, what is the PRI (Pulse Repetition
Interval)?
A: 20 us
B: 200 us
C: 500 us
D: 2 ms
What type of jitter is UNBOUNDED?
A: Random Jitter
B: Periodic Jitter
C: Data
Dependent Jitter
D: Duty cycle Jitter
Which is not a factor increasing spectral emissions?
A: Increased risetime
B: Increased attenuation
C: Memory effects
D: Baseband signal clipping
What reading represents the lowest level signal?
A: 87 dBuV
B: -10 dBm
C: 0.1V
D: -40 dBW
An input to a power sensor says DO NOT EXCEED
100 V. What is that power level?
A: 19 dBm
B: 53 dBm
C: 130 dBuV
D: 33 dBm
If
a 20 MHz modulated signal is transmitted on a 1
GHz carrier, what is the bandwidth required to see
the 5th order intermodulation products?
A: 100
MHz
B: 1.05 GHz
C: 5 GHz
D: 1010 MHz
Which is an expected advantage of MIMO (Multi-input
Multi-output) technology?
A: Improved spectral
efficiency
B: Improved spatial efficiency
C: Reduced receiver complexity
D: Lower latency
What component is not likely to have non-linear
response?
A: Band pass LC filter
B: Mixer
C: Power Amp
D: Oscillating Filter
To reduce common mode coupling from antenna
to receiver, one might:
A: Eliminate the balun
B: Change Rx antenna polarization
C: Use twisted
pair or change the dielectric constant
D: Put
a ferrite core on the antenna feed line
What
is the approximate average power of the five power
meter readings: (+40 dBm, +10 dBm, +3 dBm, +10 dBm,
+2 dBm)?
A: ~13 dBm
B: ~33 dBm
C: ~10 dBm
D: None of the above
A baseband system
has a residual EVM of 3%. If a gain block with a
4% EVM is added to the baseband and the errors are
able to sum coherently, what would the overall system
EVM approach?
A: 5%
B: 12%
C: 7%
D:
1%
