Q1/When two transmitters are transmitting to one receiver simultaneously, the communication from both nodes is available at the receiver antenna. This type of situation creates…?
Select one:
A- Multipath
B- ISI
C- Channel contention
D- None
Q2/Both hidden and exposed station problems within wireless systems can be solved by using…
Select one:
A- RTS and CTS requests.
B- RTS.
C- CTS.
D- CSMA.
Q3/Two transmitters, which cannot hear transmissions from each other, are in range with a single receiver, this will normally lead to problem that is known as the?
Select one:
A- Hidden Station Problem.
B- Exposed Station Problem.
C- Station not reachable problem.
D- All of these.
Q4/If you programmed two nodes in the lab as receivers and one as a transmitter and all are in range of each other, what do you expect to happen when the transmitter begins to transmit?
Select one:
A- Collisions
B- Nodes cannot decide and ignore the transmission.
C- Same data is seen on both receivers
D- None
Q5/The problem of multipath is addressed differently within different communication systems. Please drag and drop 5 options that represent a solution to the problem of multipath (drag and drop correct text lables in the 5 text areas below)
Q6/ We may observe any one of the following data on the receive display: 05H, 50H, A0H, 28H, 14H, 0AH even though when we are transmitting just 41h (without the 00h). Choose the most appropriate reason for this.
Note: You can emulate this by using the first set of transmit/receive code but using the wireless boards to send and receive instead of the cable. Press reset on the receive micro several times to see the above numbers. Make sure the relay on the RF board is turned on (as it is done in the second set of transmit receive code given in the lab sheet). You will need to alter code for this.
Select one:
A- a lack of time synchronisation between transmitter and receiver.
B- multipath, as it will cause exactly these values to appear on the receive display
C- a weakend signal as the transmitter and receiver move apart.
D- All these options.
E- None of the options stated here.
Q7/Data transmission using a UART ….
Select one:
A- works best only at pre-defined data rates that is set same on both sides.
B- works at any datarate defined through the use of TH1 and TL1.
C- works best only at pre-defined data rates but it does not need to be set same on both sides.
D- None.
Q8/For a data byte to come in through the UART the following should be set to '1'?
Select one:
A- TB8
B- REN
C- RB8
D- None of the above.
Q9/ If we write data into the SBuf before the TI flag is set to '0', then…?
Select one:
A- The data already in SBuf does not alter till its transmission is completed.
B- The data already in SBuf is lost/overwritten before transmission is completed.
C- we get a compile error as this operation is not allowed.
D- None.
Q10/To enable the use of the RF board for data reception, the following configuration is true?
Select one:
A. P3.0=0
B. P3.2=0
C. P3.1=0
D. P1=41h
Sample Solution