1-28. A reading of 0 dBm indicates an output value equal to which of the following signal  values? 1 . 0 dB 2. 1 milliwatt 3 . 500 watts 4. 1,000 watts 1-29. What framed transmission method is used to  transmit  ASCII  characters? 1.   Asynchronous 2.  Synchronous 3.  Message  framed 4.   Alphanumeric   framed 1-30. What  framed  transmission  method  is  used to  transmit  long  streams  of  uninterrupted data  bits? 1.  Asynchronous 2.   Synchronous 3.  Character  framed 4.   Alphanumeric   framed 1-31. When  the  asynchronous  transmission method is used, each character sent has which  of  the  following  control  bits? 1.  Start  bit(s)  only 2.  Stop  bit(s)  only 3.  Both  start  and  stop  bits 4.  Parity  bits 1-32. When  the  asynchronous  transmission method  is  used,  synchronization  between the transmitting and the receiving devices is achieved by which of the following methods? 1.   Synchronization   reference   signal   in the  preamble 2.  Synchronization  reference  in  the  stop codes 3.  Character-by-character synchronization 4.   External   timing   signals   sent concurrently  on  a  separate  line 1-33. Which of the following codes indicates the beginning sequence of a synchronous message? 1.  Sync  bits 2.   Stop   code 3.  Parity  code 4.  Preamble IN  ANSWERING  QUESTIONS  1-34  THROUGH 1-38.  MATCH  THE  TERM  OR  STATEMENT  IN COLUMN  A  WITH  THE  BASIC  MODE  OF MODULATION  LISTED  IN  COLUMN  B. RESPONSES  IN  COLUMN  B  MAY  BE  USED MORE  THAN  ONCE. A.  TERMS/ STATEMENT B.  MODES 1-34. The change in 1.  Phase signal amplitude modulation indicates a change in the 2.   Amplitude 1 or 0 bits modulation being  transmitted 3.   Frequency modulation 1-35. Differential quadrature phase-shift keying 4