NICET Design Practice
Which two of the following are the MOST common terms used for an in-building floor plan containing a multi colored visualization of signal strength? (Choose two)
Contour map
Heat map
Propagation matrix
Radiation map
Which statement best describes the reasoning for choosing a donor antenna type and location for a signal booster driven ERRC design?
Should be directional and located near the center of the building
Should be directional and located near the edge of the building
Should be omnidirectional and located near the center of the building
Should be omnidirectional and located near the edge of the building
If the design team is missing a frequency list, which is the BEST action to take?
Direct the field team to obtain information from a post-contract visit
File a request from the FCC licensee
File a request with the building owner
Quote a typical design and handle corrections through change orders
In MOST propagation software programs, which parameter determines how far an antenna radiates on a given floor plan?
Input power to antenna
Latitude and longitude
Manufacturer
Type of couplers
When creating a bill of materials (BOM), what is the MOST LIKELY reason more cables than the design requires to be included?
Cables are ordered to longer lengths because manufacturers sell pre-terminated rolls
Designed cable pathways may not be available, resulting in longer cable runs
Extra cables should be left with owner if they need to replace the cabling
There should not be extra cabling in the bill of materials as it wastes money and resources
When combining a VHF and UHF signal booster output into a single transmission line, which passive device should be used to ensure the BEST isolation between inputs?
Circulator
Diplexer
Directional coupler
Type-N T connector
When first visiting a site in a field, which three of the following field observations are relevant to the designer? (Choose three)
Visual examination of the surrounding area for location of nearby physical obstacles
Visual examination of the surrounding area for unwanted signal sources
Visual examination of the surrounding area to determine if there are any C-band satellite transmitters
Visual examination of the surrounding area to determine if there are public safety voting receivers
Which term describes a system installed in buildings to distribute telemetry, WLAN, cellular, building automation, and public safety signals?
Hybrid system
Multi-use system
Neutral host system
Private venue system
According to NFPA 1221, when used as the sole guidance during the initial site survey grid tests, which parameter is the most important?
Delivered audio quality
Distortion
Frame error rate
Signal level in decibels
Which two of the following measurements would indicate a potential interference issue? (Choose two)
RSSI equals -85 dBm and BER equals 0%
RSSI equals -85 dBm and BER equals 30%
RSSI equals -85 dBm and SINR equals 5dB
RSSI equals -85 dBm and SINR equals 30dB
According to NFPA 1221, who is responsible for maintaining the technical documents of a signal booster installation?
AHJ
Building owner
Fire marshal
Integrator
According to NFPA 1221, what is the amount of back up time necessary for a signal booster system?
9-hours at 100% system load
12-hours at 90% system load
24-hours at 100% system load
12-hours at 100% system load
According to IFC, why is it required that isolation between the donor antenna and all inside antennas be maintained to at least 20 dB greater than system gain?
20 dB of isolation prevents potential system oscillation
A 20 dB loss in the antenna system is expected
Bi-directional amplifiers have maximum gain larger than 20 dB
It is difficult to find antenna systems that have at least 20 dB of gain
When creating a closeout package, which two of the following pieces of information should be included? (Choose two)
As-built drawings
Equipment specification sheets
Letter from the FCC
System operational parameters
An ERRCS design will secure horizontal cables with J-hooks. Assuming the design requires 1,000 ft of horizontal cable, what is the approximate number of J-hooks to be included in the BOM?
50-100
250-300
500-550
1,000-1,050
What is the maximum per channel bandwidth a Class A signal booster may have?
25 kHz
75 kHz
150 kHz
300 kHz
According to NFPA 1221, which option would allow for a backbone cable to be run in a fire-rated building?
Cable protected by a halon release system
Cable running through a fire-protected pathway that meets building's fire rating
Cable running through electrical metallic tubing with fire-stop as needed
Cable running through stacked telecom rooms
According to NFPA 1221, when a signal test survey is conducted within a building for public safety communication signal strength, what is the MINIMUM signal strength requirements for critical and common areas?
DAQ 2.0
DAQ 3.0
DAQ 3.4
DAQ 5.0
What is the definition of SNR?
The ratio between incident and reflected power
The ratio between signal power and noise power
The ratio between two primary frequencies
The ratio of voltage of an RF signal on a transmission line
Which three of the following measurements are the MOST USEFUL when performing an ERRCS site survey? (Choose three)
BER
DAQ
RSRP
RSSI
Which one of the following options is the MOST accurate way to scale a drawing?
Based off of a typical 3-foot doorway
Based off of a typical 9-foot parking spot
Based off of a 50-foot hallway
Based off of a 300-foot outside wall
According to the Indoor Radio Planning guide, which three of the following documents should the RF planner provide? (Choose three)
Equipment lists
Floor plans and diagrams
Project time and costs
Site survey
Which two of the following considerations are key to interpreting RF signal strength? (Choose two)
Isolation
Link budget
Proper software modeling
Subscriber power
What must the RF engineer do to determine a system layout design for a particular building?
Ask for approval of the state fire marshal
Contact the system manufacturer and order materials
Interpret the signal survey maps, and provide a system if necessary to meet the fire codes
Utilize the test methods of the building adjacent to the building
According to NFPA 1221, sufficient inbound signal strength for both analog and digital signals should provide a minimum what?
-95 dBm
-102 dBm
DAQ 3.0
DAQ 3.4
What is the BEST way to extend coverage in a building in which a single donor-fed signal booster is incapable of covering the whole facility?
Extend coverage by connecting multiple signal boosters in a series
Extend coverage by using a fiber distributed antenna system
Extend coverage by using a higher power signal booster
Extend coverage by using multiple donor-fed signal boosters
Which two of the following conditions are examples of external interference? (Choose two)
Adjacent channel signal
Co-channel signal
Front-end overload
Second mixer overload
Which documentation MUST be submitted to the AHJ in order to validate a design's layout?
FCC general radio operator's license
Link budget
Location longitude and latitude
Signed authorization from the licensee
According to the FCC, when determining the proper signal booster to install where needed, what must the RF designer do?
Ask the fire marshal for their preferred manufacturer
Consider lightning protection according to NFPA 70 article 720
Install the signal booster next to the FACU
Seek approval from the local licensee for design approval
Which two of the following pieces of information are included when creating a bill of materials (BOM) for a signal booster system? (Choose two)
Equipment specifications
Intermodulation
Itemized equipment list
Link budget
On the donor signal, which signal to noise ratio is BEST for the designer to strive to achieve?
10 dB
15 dB
17 dB
20 dB
Who has the final responsibility for approving the equipment used in a system design?
Electrical contractor
Engineer of record
Licensee
Technician
A designer is reading the site survey report for a building that achieves 95% signal coverage in elevator lobbies. According to NFPA 1221, why does this building fail to meet coverage requirements?
Critical areas must meet 90% floor area radio coverage
Critical areas must meet 99% floor area radio coverage
General areas must meet 90% floor area radio coverage
General areas must meet 99% floor area radio coverage
When should the bill of materials (BOM) be finalized?
During completion of the signal survey
Upon approval from the FCC licensee with retransmit authority
When the building roof has been installed and all windows are in
When the down payment has been received from the building owner
Which three of the following effects may spurious and harmonic emissions have on a signal booster system? (Choose three)
Composite power may be negatively impacted
Donor antenna's tuning may be affected
Signal boosters may amplify spurious emissions
Signal boosters may be overloaded
What is the minimum amount of isolation that should be established between the donor antenna and any coverage antenna?
10 dB more than the gain of the donor antenna
10 dB more than the system gain
20 dB more than the gain of the donor antenna
20 dB more than the system gain
When utilizing a Class B signal booster for installation, which two of the following actions must be taken? (Choose two)
Ensure uplink gain is above 80 dB
Register the Class B system with the FCC
Seek approval by the RF system designer
Seek approval from the local licensee
When performing a site survey, which two of the following site issues can affect the design of the signal booster system? (Choose two)
Availability of AC power outlets
Building constriction density
Location of the fire strand pipe
Other radio systems within the building
From which source does the design engineer obtain frequency information for the installation of an ERRCS?
AHJ
FCC
Licensee
Standard
Which three of the following are examples of spurious emissions? (Choose three)
Intermodulation products
Harmonics
Hum and noise
Valid RF carrier
If a donor antenna exists, what is the MINIMUM isolation that shall be maintained between the donor antenna and all inside antennas?
15 dB above system gain
15 dB below system gain
20 dB above system gain
20 dB below system gain
What shall signal boosters used in an ERRCS have?
Locking mechanism
Minimum power of 1 Watt
Oscillation prevention circuitry
Squelch circuitry
When installed in buildings, which three of the following wiring requirements apply to conductors and wiring? (Choose three)
Wiring for control equipment may be 24 AWG
Wiring shall be installed to prevent vibration and/or stress
Wiring should be installed within metallic raceways
Wiring that is unsupported shall not be smaller than 12 AWG
What is the MINIMUM delivered audio quality (DAQ) level for public safety transmissions?
3.0
3.4
4.1
4.5
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