You have been given the task of designing a point-to-point wireless communications link between two buildings spaced 2 km apart. Tests show that the signal-to-noise ratio P/kT at the receiver is 20 dB.
a. What is the minimum amount of bandwidth needed to support a 1 Mbit/s link?
b. Suppose you have a bandwidth limitation of 5 MHz. Is the SNR sufficient to support a data rate of 5 Mbits/s?
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On the three-phase motor, the windings are arranged to produce a rotating magnetic field when connected to a three-phase source.
Answer the following statement true (T) or false (F)
A(n) ____ is a device intended to provide protection from the effects of arc faults by recognizing characteristics unique to arcing.
A. circuit interruptor (CI) B. arc-fault circuit interruptor (AFCI) C. grounded circuit interruptor (GCI) D. diagnostic arc-fault interruptor (DACI)
Vehicles with a bin number of 3 have ________ than vehicles with a bin number of 1
A) Less emissions B) The same emissions C) More emissions D) None of these
Ultrasonic leak detectors detect refrigerant leaks by:
A) Seeing the refrigerant by sensing the effect that the leaking refrigerant gas has on sonar. B) Seeing the change in infrared radiation around the area of the leak. C) Seeing the change in ultra-violet radiation around the area of the leak. D) Hearing the high frequency of the escaping gas.