Synchronization Flashcards
Define Bit Error
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
Define Synchronization
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
Define Slip
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
Define Plesiochronous
- 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
Define Stratum
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)
Define External Timing
Timing reference obtained from a source such as a navigation system, external to the given system
Define the purpose of Primary Reference Source
Master clocking source in a network is referred to as the Primary Reference Source
Define Clock Recovery Timing
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
Define the purpose of a Buffer
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
Define Encryption
Transformation of data into a form unreadable by anyone without a secret decryption key
Define RED/BLACK isolation
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.
Define Communications Security (COMSEC)
Provides traffic security which is the protection (encryption/decryption) of classified or unclassified operational information
Define Transmission Security (TRANSEC)
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
Maximum data rate of the KIV-19/19A
9.6 Kbps up to 13 Mbps
Maximum data rate of the KIV-7M
Up to 50 Mbps depending on strap settings
Define the purpose of signal converter
Electronic devices that change a data signal into a form suitable for a transmission medium or reverse
Define maximum data rate of the CV-HTU-16M
16,384 Kbps
Define maximum data rate of the CV-FOM-D
16,384 Kbps
ID the maximum planning range of the AN/MRC-142C.
35 miles
ID the frequency ranges of the bands in which the AN/MRC-142C operates.
- Band I -225-400 MHz
- Band III+ -1350 to 2690 MHz
ID the minimum allowable transmit/receive frequency separation given an operational frequency band for the MRC-142C
- Band I -25 MHz
- Band III+ -50 Mhz
ID the maximum encrypted data rate of the MRC-142C.
14,336 Kbps
Given a MRC-142C antenna, ID the frequency band in which it operates.
- Band I Antenna (AS-3875) -225-400 MHz frequency range
- Band III+ Antenna (AS-4515) -1350-2690 MHz range
ID the four radio modes of the MRC-142C.
- Standby -No transmission
- Analog Engineering Order Wire (AEOW) voice unencrypted
- Digital Engineering Order Wire (DEOW) voice encrypted
- Traffic -Multiplexed data stream
ID the three basic operational configurations of the MRC-142C.
- Single Link Terminal
- Dual Link Terminal
- Through-Repeater
ID in writing the appropriate multichannel radio symbol for the MRC-142C.
circle pik with triangle inside M(c) 142
Band I Band II Freq Range 255-400 MHz 1350-2960 MHz Freq Separation 25 MHz 50 MHz
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