Synchronization

Question 1

Define Bit Error

Answer 1

A bit error is transferred from the source to the destination within the assigned time slot, but when delivered is of a different value from that sent from the source

Question 2

Define Synchronization

Answer 2

Networking term that applies to a state where data or information arrives and departs from connected devices at coordinated time so that data is neither lost nor jumbled

Question 3

Define Slip

Answer 3

The repetition or deletion of a block of bits in a synchronous bit stream due to inadequate synchronization of the two clocks controlling the transmission and reception of the signals that represent the symbols

Question 4

Define Plesiochronous

Answer 4

• Most common timing scheme employed in networks is established using a plesiochronous approach
• When two networks operate with clock sources of sufficiently high stability such that signals in the two networks are nearly synchronous, the network is plesiochronous

Question 5

Define Stratum

Answer 5

The accuracy and stability of each clock are such that there is almost complete coincidence in time-keeping and is classified in a four-level hierarchy as defined by ANSI into stratum levels based on performance (quality or accuracy over time)

Question 6

Define External Timing

Answer 6

Timing reference obtained from a source such as a navigation system, external to the given system

Question 7

Define the purpose of Primary Reference Source

Answer 7

Master clocking source in a network is referred to as the Primary Reference Source

Question 8

Define Clock Recovery Timing

Answer 8

Distributed devices derive or recover their clocking from the PRS via a received signal so that the entire network and all associated network elements maintain synchronization

Question 9

Define the purpose of a Buffer

Answer 9

Temporary storage medium used to compensate for a difference in rate of flow of data or time of occurrence of events when transferring data from one device to another

Question 10

Define Encryption

Answer 10

Transformation of data into a form unreadable by anyone without a secret decryption key

Question 11

Define RED/BLACK isolation

Answer 11

Pertains to the separation of electrical and electronic circuits, components, equipment and systems that handle unencrypted (RED) information in electrical signals from those that handle encrypted (BLACK) information in the same form.

Question 12

Define Communications Security (COMSEC)

Answer 12

Provides traffic security which is the protection (encryption/decryption) of classified or unclassified operational information

Question 13

Define Transmission Security (TRANSEC)

Answer 13

Provides for the protection of transmissions from interception and exploitation by means other than crypto analysis and involves a number of measures to protect transmissions

Question 14

Maximum data rate of the KIV-19/19A

Answer 14

9.6 Kbps up to 13 Mbps

Question 15

Maximum data rate of the KIV-7M

Answer 15

Up to 50 Mbps depending on strap settings

Question 16

Define the purpose of signal converter

Answer 16

Electronic devices that change a data signal into a form suitable for a transmission medium or reverse

Question 17

Define maximum data rate of the CV-HTU-16M

Answer 17

16,384 Kbps

Question 18

Define maximum data rate of the CV-FOM-D

Answer 18

16,384 Kbps

Question 19

ID the maximum planning range of the AN/MRC-142C.

Answer 19

35 miles

Question 20

ID the frequency ranges of the bands in which the AN/MRC-142C operates.

Answer 20

• Band I -225-400 MHz

- Band III+ -1350 to 2690 MHz

Question 21

ID the minimum allowable transmit/receive frequency separation given an operational frequency band for the MRC-142C

Answer 21

• Band I -25 MHz

- Band III+ -50 Mhz

Question 22

ID the maximum encrypted data rate of the MRC-142C.

Answer 22

14,336 Kbps

Question 23

Given a MRC-142C antenna, ID the frequency band in which it operates.

Answer 23

• Band I Antenna (AS-3875) -225-400 MHz frequency range

- Band III+ Antenna (AS-4515) -1350-2690 MHz range

Question 24

ID the four radio modes of the MRC-142C.

Answer 24

• Standby -No transmission
• Analog Engineering Order Wire (AEOW) voice unencrypted
• Digital Engineering Order Wire (DEOW) voice encrypted
• Traffic -Multiplexed data stream

Question 25

ID the three basic operational configurations of the MRC-142C.

Answer 25

• Single Link Terminal
• Dual Link Terminal
• Through-Repeater

Question 26

ID in writing the appropriate multichannel radio symbol for the MRC-142C.

Answer 26

circle pik with triangle inside M(c) 142

Question 27

Band I
Band II
Freq Range
255-400 MHz
1350-2960 MHz
Freq Separation
25 MHz
50 MHz

Answer 27

.