Jr.System Engineer
Preamble: Unistring Tech Solutions presents a unique opportunity through its Knowledge and Skills Enhancement Initiative. By offering essential video content for training materials, it enables individuals to grab internship opportunities.
Disclaimer: The role and responsibilities mentioned in the below Job Description are and indicative. Based on the performance, there may be a change as per the requirements.
Note: Responsibilities and Assessment Questions can be found after video content.
Skill and Knowledge Elements
Responsibilities
1. Testing system functionality, focusing on Input/Output specifications and connectivity features.
2. Document and maintain records of test results according to established guidelines.
3. Conduct field tests to ensure system performance and reliability in real-world conditions.
4. Ensure the safety of the system under test, as well as all equipment utilized during the testing process.
5. Demonstrate flexibility in working hours to accommodate varying project needs.
6. Be willing and prepared to travel to client locations for system installation, testing, and support activities.
Sample Assessment Questions
1. If an RF signal has an amplitude of 2 mW and another has an amplitude of 5 mW, calculate the power ratio in dB.
- A. 3
- B. 3.5
- C. 3.97
- D. 10
2.You have a system with an input noise power of 20 dBm and an output noise power of 40 dBm. Calculate the noise figure of the system.(Gain=20dbm)
- A. 1
- B. 0.5
- C. 2
- D. 0.7
3.You are using a spectrum analyzer with a start frequency of 1 GHz and a stop frequency of 2 GHz with resolution bandwidth setting of 1 MHz and 1000 Resolution Bandwidth Filters.Calculate the resolution bandwidth.
- A. 0.5
- B. 1
- C. 2
- D. 10
4. You are designing a wireless communication link operating at 2.4 GHz with a transmitter power of 20 dBm, and the receiving antenna is located 500 meters away. Calculate the Free Space Path Loss.
- A. 80 dB
- B. 259.6394 dB
- C. 94 dB
- D. 100 dB
5. The initial SNR measured at the transmitter was 20 dB. In order to combat the channel conditions, the signal power was doubled prior to transmission. What is the new SNR at the transmitter?
- A. 23db
- B. 14db
- C. 16db
- D. 40db
6. A signal of 0.1kW is transmitted in a cable. The attenuation of cable is -5dB/km and cable length is 20 km . The power received at receiver is 10^-x W . The value of x is ______.
- A. 10
- B. 8
- C. 7
- D. 4
7. If a signal x(t) has a fundamental frequency of 60 Hz, what is the period T of this signal in milliseconds?
- A. 16.67 ms
- B. 33.33 ms
- C. 20 ms
- D. 50 ms
8. When performing a continuity check with a multimeter, what does a continuous beep sound indicate?
- A. The circuit is open.
- B. The circuit has high resistance.
- C. The circuit is closed and has very low resistance.
- D. The battery in the multimeter is low
9. When measuring the current flowing through a 100 Ω resistor using a multimeter, the multimeter display indicates 0.25 A. What is the voltage across the resistor?
- A. 2.5 V
- B. 25 V
- C. 250 V
- D. 25 mV
10. If five divisions are spanned by one cycle of a waveform with the time base set to 2 ms/div, what is the frequency of the signal?
- A. 100Hz
- B. 50Hz
- C. 200Hz
- D. 25Hz
11. For a signal with a frequency of 1 kHz, what is the most appropriate time base setting to observe one complete waveform cycle on an oscilloscope screen?
- A. 0.1 ms/div
- B. 0.5 ms/div
- C. 1 ms/div
- D. 5 ms/div
12. When analyzing a signal with a fundamental frequency of 2.4 GHz, which frequency range setting should be selected on a spectrum analyzer for optimal viewing?
- A. 1 GHz to 3 GHz
- B. 2 GHz to 4 GHz
- C. 2.3 GHz to 2.5 GHz
- D. 0 Hz to 3 GHz
13. A signal has a power of 1 milliwatt (mW). What is its level in dBm?
- A. 0 dbm
- B. 1 dbm
- C. 10 dbm
- D. 30 dbm
14. A microwave network analyzer measures the S21 parameter of a device as 3 dB. What does this mean for the signal passing through the device?
- A. The signal's power is doubled.
- B. The signal's power is halved.
- C. The signal's power is unchanged.
- D. The signal's power is quadrupled.
15. What is the VSWR of a transmission line where the maximum voltage is twice the minimum voltage?
- A. 2:1
- B. 3:1
- C. 4:1
- D. 1:1
16. Calculate the Free Space Path Loss (FSPL) in dB for a signal at 2.4 GHz traveling a distance of 10 km. Assume the speed of light is approximately 3×10^8 m/s.
- A. 100 dB
- B. 120 dB
- C. 140 dB
- D. 160 dB
17. What is the VSWR for a system where the reflected power is 1% of the incident power?
- A. 1.22:1
- B. 1.11:1
- C. 1.5:1
- D. 2:1
18. For a transmission line with a characteristic impedance of 50 Ω, what is the impedance of a load for maximum power transfer?
- A. 25 Ω
- B. 50 Ω
- C. 75 Ω
- D. 100 Ω
19. If a signal with a frequency of 5 GHz experiences a free space path loss of 100 dB over a certain distance, what is the path loss in dB for the same distance at a frequency of 10 GHz?
- A. 100 dB
- B. 106 dB
- C. 120 dB
- D. 140 dB