4-19.    The multi-station POFA is run in which of the following modes ? 1.   Net test 2.   Roll  call 3.   Broadcast 4.    Short broadcast 4-20.    When a multi-station POFA is run, what total number of data words are in each block of data transmitted? 1. 115 2. 230 3. 345 4. 460 4-21.    When a multi-station POFA is run, all units participating in the test should be positioned within how many miles of each other? 1. 25 2. 50 3. 75 4. 100 4-22.    A multi-station POFA should be run using which of the following frequencies? 1.   Any HF frequency 2 Any UHF frequency 3.   The current operational frequency only 4.   The current secondary frequency only 4-23. The multi-station POFA should be run for what minimum amount of time? 1. 5 minutes 2. 7 minutes 3. 10 minutes 4. 15 minutes 4-24.    At the completion of the multi- station POFA, the technician should record which of the following information on the error printout? 4-25.    A multi-station POFA should be considered successful when the link quality factor is which of the following values? 1. Greater than 90 percent 2. Greater than 100 percent 3. Greater than 95 percent but less than 100 percent 4. It must equal 100 percent 4-26.    A multi-station POFA is considered successful when the computed receive error factor is less than what percentage? 1. 1 2. 5 3. 10 4. 15 4-27. Which of the following buffers is acceptable to be received from an unrecognized station (UNREC STA) when a multi- station POFA is running? 1.    One buffer of 200 words 2.    One buffer of 230 words 3.    Two buffers of 200 words 4.    Two buffers of 230 words 4-28. The heading PARITY STATUS OF CORRECT WORDS lists which of the following error conditions? 1.   Words determined to be correct by the DTS parity check and found in error by the computer parity check 2.    Words determined to have an error and corrected by the DTS 3.    Words determined to be correct by both the DTS and the computer parity checks 4.    Words determined to be in error by the DTS parity check and found correct by the computer parity check 1.    Distance and bearing of all PUs 2. Frequency used 3.    Start and stop time of the POFA 4.    All of the above 21