NAVEDTRA 14189A, Ch. 3 Flashcards
What provides the capability to transfer remote control station functions and signals to transmitters?
Transmitter transfer switchboard
What is the most widely used code in manual telegraphy?
Morse code
The interval between words is equal to how many dots in morse code?
Seven
The five-unit (five-level) code has been the most commonly used in modern printing telegraphy and is universally used in teletypewriter operation. This is also known as what code?
Baudot
What are the two basic modes of teletypewriter operation?
Asynchronous and Synchronous
What is the most common mode used in teletypewriter operation?What is the most common mode used in teletypewriter operation?
Start-stop
What is the reciprocal of the time in seconds of the shortest signal element?
Baud rate
How many words per minute is the defense communications system standard speed for teletypewriter operation?
100
Which type of circuits make use of the presence or absence of current flow to convey information?
Neutral
Under which condition does the teletypewriter appear to be running because the machine is decoding the constant space as the Baudot character blank and the type hammer continually strikes the type box but there is no printing or type box movement across the page?
Running open
Which two basic radio teletypewriter (ratt) systems does the Navy use?
Tone modulated and Carrier Frequency Shift
Which colors are used on patch panels to identify whether that panel is used for passing secure or non-
secure information?
Red and Black
Which type of equipment is used to encrypt and decrypt tty messages that require security handling?
Cryptographic
What takes the rf signal passed on by the antenna filter and translates it to an audio signal?
Radio Receiver
What is a combined, simultaneous display of the amplitude and phase relationships of two input signals?
Lissajous pattern
