ETCP Ericsson Microwave and Transmission Solutions 1

Question 1

What does XPIC stand for in Ericsson MINI-LINK microwave systems?

Accepted Answer

Cross-Polarization Interference Cancellation

Answer

XPIC stands for Cross-Polarization Interference Cancellation, enabling both polarizations on the same frequency to double spectral efficiency.

Question 2

Which Ericsson product family is the primary platform for microwave backhaul?

Accepted Answer

MINI-LINK

Answer

Ericsson's MINI-LINK product family is specifically designed and marketed for microwave backhaul applications.

Question 3

What is the primary purpose of Adaptive Coding and Modulation (ACM) in a microwave link?

Accepted Answer

To adjust modulation order and coding rate based on current link conditions

Answer

ACM dynamically lowers the modulation order during signal degradation (e.g., rain fade) to maintain link availability at the cost of reduced throughput.

Question 4

Which synchronization standard provides phase and time synchronization required by LTE and 5G in Ericsson microwave backhaul?

Accepted Answer

IEEE 1588v2 (PTP)

Answer

IEEE 1588v2 (Precision Time Protocol) delivers sub-microsecond phase/time accuracy needed for LTE TDD and 5G NR synchronization.

Question 5

What frequency range defines the E-band used in high-capacity Ericsson MINI-LINK deployments?

Accepted Answer

71–86 GHz

Answer

E-band occupies 71–86 GHz, offering large channel bandwidths (up to 2 GHz) that enable multi-gigabit backhaul over short distances.

ETCP - Ericsson Technical Certification Program Practice Test

ETCP - Ericsson Technical Certification Program Practice Test

ETCP Ericsson Microwave and Transmission Solutions 1