©PREP4EXAMS@2024/2025 [ REAL-EXAM-DUMPS] Monday, August 5, 2024 1: 54 PM
WEST VIRGINIA UNIVERSIRTY-WV26506
CBRS Training notes Practice Questions and Answers (100% Pass)
aggregate interference constraint - ✔️✔️means that the total amount of noise caused to
each higher priority user is kept to acceptable levels.
SAS - ✔️✔️Spectrum Access System. The scalable cloud service that manages CBRS
transmissions. The SAS manages information about all users of the CBRS band,
in order to ensure that higher priority users are
protected from harmful interference.
What frequency band does CBRS operate - ✔️✔️3550 MHz to 3700 MHz
What are the three tiers for CBRS users? - ✔️✔️• Tier 1 - Tier one is the incumbents.
They were here first using the spectrum before the CBRS band was created,
so they get top priority wherever overlap happens.
• Tier 2 - goes to CBRS users who paid to be protected from interference from users in
the third tier. They do this by buying a priority access license, or PAL, at an auction.
Having a PAL still doesn't guarantee access at all times, because only incumbents get
that. But the PAL protects a tier two user from having their service interrupted by the
users of the third tier.
1
,©PREP4EXAMS@2024/2025 [ REAL-EXAM-DUMPS] Monday, August 5, 2024 1: 54 PM
WEST VIRGINIA UNIVERSIRTY-WV26506
• Tier 3 - general authorized access users, or GAA users.
GAA users can use the CBRS spectrum if it's not being used locally by the other two
tiers at that time. If a higher priority user is using a portion of the spectrum at that time,
GAA users may need to move to other parts of the CBRS band. GAA users don't get
any interference protection from the other tiers, but they have a much much lower cost
since they don't need to buy a license.
PAL - ✔️✔️priority access license. protects a tier two user from having their service
interrupted by the users of the third tier.
What does a PAL cover - ✔️✔️PAL covers one county(only covers areas you're actually
using the pal not the hole county) and
offers protection for a single 10 megahertz channel.
PPA - ✔️✔️PAL protection area. is a contiguous area created by calculating the
combined service areas of
individual transmitters owned by the PAL user.
CBRD - ✔️✔️CBRS devices called CBSDs
talk to the SAS in order to
obtain permission to transmit.
2
, ©PREP4EXAMS@2024/2025 [ REAL-EXAM-DUMPS] Monday, August 5, 2024 1: 54 PM
WEST VIRGINIA UNIVERSIRTY-WV26506
They only get that permission if they won't be causing
any harmful interference to higher priority users. typically base stations or access
points,
and they need to communicate directly with
the SAS before they use the CBRS band.
EUD - ✔️✔️End user device. Are not CBSDs because they adhere to stricter power
limitations and do not talk to the SAS
ESC - ✔️✔️environmental sensing capability. ESCs are sensors deployed along
the US coastlines to detect naval radar activity.
When an ESC detects that the Navy is using the band,
it sends a signal to the SAS and the SAS adjusts
CBSD operations to prevent
interference with naval operations.
Because of the important job that they do,
ESCs themselves are also considered to
be tier one users of the CBRS band,
and they receive interference protection just like incumbents.
3
WEST VIRGINIA UNIVERSIRTY-WV26506
CBRS Training notes Practice Questions and Answers (100% Pass)
aggregate interference constraint - ✔️✔️means that the total amount of noise caused to
each higher priority user is kept to acceptable levels.
SAS - ✔️✔️Spectrum Access System. The scalable cloud service that manages CBRS
transmissions. The SAS manages information about all users of the CBRS band,
in order to ensure that higher priority users are
protected from harmful interference.
What frequency band does CBRS operate - ✔️✔️3550 MHz to 3700 MHz
What are the three tiers for CBRS users? - ✔️✔️• Tier 1 - Tier one is the incumbents.
They were here first using the spectrum before the CBRS band was created,
so they get top priority wherever overlap happens.
• Tier 2 - goes to CBRS users who paid to be protected from interference from users in
the third tier. They do this by buying a priority access license, or PAL, at an auction.
Having a PAL still doesn't guarantee access at all times, because only incumbents get
that. But the PAL protects a tier two user from having their service interrupted by the
users of the third tier.
1
,©PREP4EXAMS@2024/2025 [ REAL-EXAM-DUMPS] Monday, August 5, 2024 1: 54 PM
WEST VIRGINIA UNIVERSIRTY-WV26506
• Tier 3 - general authorized access users, or GAA users.
GAA users can use the CBRS spectrum if it's not being used locally by the other two
tiers at that time. If a higher priority user is using a portion of the spectrum at that time,
GAA users may need to move to other parts of the CBRS band. GAA users don't get
any interference protection from the other tiers, but they have a much much lower cost
since they don't need to buy a license.
PAL - ✔️✔️priority access license. protects a tier two user from having their service
interrupted by the users of the third tier.
What does a PAL cover - ✔️✔️PAL covers one county(only covers areas you're actually
using the pal not the hole county) and
offers protection for a single 10 megahertz channel.
PPA - ✔️✔️PAL protection area. is a contiguous area created by calculating the
combined service areas of
individual transmitters owned by the PAL user.
CBRD - ✔️✔️CBRS devices called CBSDs
talk to the SAS in order to
obtain permission to transmit.
2
, ©PREP4EXAMS@2024/2025 [ REAL-EXAM-DUMPS] Monday, August 5, 2024 1: 54 PM
WEST VIRGINIA UNIVERSIRTY-WV26506
They only get that permission if they won't be causing
any harmful interference to higher priority users. typically base stations or access
points,
and they need to communicate directly with
the SAS before they use the CBRS band.
EUD - ✔️✔️End user device. Are not CBSDs because they adhere to stricter power
limitations and do not talk to the SAS
ESC - ✔️✔️environmental sensing capability. ESCs are sensors deployed along
the US coastlines to detect naval radar activity.
When an ESC detects that the Navy is using the band,
it sends a signal to the SAS and the SAS adjusts
CBSD operations to prevent
interference with naval operations.
Because of the important job that they do,
ESCs themselves are also considered to
be tier one users of the CBRS band,
and they receive interference protection just like incumbents.
3
