ASSIGNMENT 2
Textbook Assignment:
“The Link-11 System,” chapter 2, pages 2-7 through 2-23; “Link-11 Fault
Isolation,” chapter 3, pages 3-1 through 3-7.
2-1 .
2-2 .
2-3 .
2-4 .
Net Sync continuously broadcasts which
of the following signals?
1. Phase reference frames
2. Start codes
3. Stop code
4. Preamble frames
When the stored sync mode is operating,
the picket station uses which of the
following signals to establish a time base?
1 .
2 .
3 .
4 .
An external frequency standard
The internal frequency standard in the
DTS
The sync signal received from NCS
The sync signal received form another
picket
Which of the following functions is NOT
tested when Net Test is running?
1. DTS to radio interface
2. CDS computer to DTS interface
3. Radio to antenna interface
4. Radio receiver function
The preamble of a Link-11 message
consists of a total of how many frames?
1. Five
2. Six
3. Seven
4. Eight
2-5 .
2-6 .
2-7 .
During transmission of the preamble, the
605 Hz tone is transmitted at which of the
following power levels?
1. –6 dB
2. +6 dB
3. –12 dB
4. +12 dB
To enable the DTS to detect frame
transitions during the preamble, the 2,915
HZ sync tone is phase shifted how many
degrees at each frame?
1. 90
2 . 1 8 0
3 . 2 7 0
4 . 3 6 0
The phase reference frame of a Link-11
header performs which of the following
functions?
1. Provides synchronization between
the DTS and the CDS computer
2. Provides a time reference for the
DTS
3. Provides a time reference for the
radio
4. Provides the reference to extract
the data in the next frame
10
