RCC MRC 142C
What does DEOW stand for
Digital Engineering Orderwire
Identify in writing the safety considerations of MRC 142C
Do not place the antenna near power lines, do not erect mast in winds that exceed the limit 15ft -25mph 35ft- 20mph 50ft- 15mph
Can u operate the transmitter in the AN/MRC 142C when antennas are below 15 feet
No
What AN/MRC142C timing refrences the signal received on the NRZ interface (CV-HTU)
Radio
Identify the characteristics of the MRC 142C
Radio terminal set installed in M1123, can be configured as a repeater to extend the communication range betwen two other systems beyond the 35 miles.
What is the purpose of the TAC-300
Serves as a multiplexer for the MRC 142C capable of receivinf signals from multple interfaces.
Identify the operating configurations of the MRC 142C
Single Link, Dual Link, Repeater( Straight Through), Reapeater ( Drop & Insert).
The AN/MRC 142C creates a data tunnel to bridge the distance between 2 points up to 35 miles. True of False
True
The AN/MRC 142C provides trunk or cable cable side connection for military and commercial switches. True or Flase
True
The AN/MRC142C single link uses only one LRS terminal when only one radio path is required. True or False
True
The maximum distance between AN/MRC 142Cs utilizing the straight through repeater configuration is up to 35 miles. True or False
True
What is the purpose of the Repeater ( Drop & Insert)
When a particular mission requires access to traffic at a reapeater site
What is the purpose of a Repeater (Straight Through)
When a particular radio path between two MRC 142C are longer than 35 miles, or does not have a line of sight path
For Dual Link the two independent LRS are used for what
When two seperate UHF radio paths are required
When is the Single Link used
When only one UHF (HCLOS) radio path is required
What are the Freq for a Band III Antenna
1350 to 2690 mhz
What is the maximum aggregate data throughput per second ENCRYPTED for a AN/GRC-245
14.336 mbps
What is the max height you can extend the AN/MRC 142C antenna if winds are blowing 25 mph
15ft
What is the maximum aggregate data throughput per second UNENCRYPTED for a AN/GRC-245
16.384 mbps
How many line of of sight radios subsystems terminals does the AN/MRC 142 have
2
What are the Freq for a Band I Antenna
225 to 400 mhz
What is the maximum range on a PTP Link
35 miles
What is the minimum transmit-receive spacing for a AN/GRC-245
50 MHz
Identify in writing the order wire configurations
AEOW unsecured communication, DEOW secure communication.
The BBU provides interfaces for the following iteams
1) RF unit, Bulk traffic, data service channel, and DEOW 2) Controls, monitors, and configures radio 3) analog orderwire handset in Analog Engineering 4) maintenance port for test and debug purpose 5) Modulation and demodulation interface 6) MUX/Demux for traffic, DVOW, and radio interface
What is the purpose of CV-FOM
Converts NRZ framed optical fiber to Balance CDI to framed optical fiber
Identify the types of timing of the MRC 142C
Internal-refrences the internal clock from the CV-HTU. Cable- references the signal received from the fiber interface. Radio- references the signal received on the NRZ interface
What is the purpose of the VT-100
Is for the configuration of the CV-FOM and TAC-300. It is located in transit case 3
Identify the purose of the MRC 142C
Is to provide medium range Ultra high Frequency, line of sight , point to point radio comm between other MRC 142 over a distance of 35 miles.
What are the characteristics of the AN/GRC-245 radio set
Its a high capacity line of sight radio receiver transmitter for Band I or Band III frequencies
What Trunk Encrypted device (TED) encrypted/decrypted the AN/MRC 142C trunk communications
KIV-7M
The KYB-702 buffer is used to Sync up the time between the ____ and the _______
KY-57 - AN/GRC-245
The AN/GRC-245 radio set automatically switches the AC to DC power source when the AC power is lost. TRUE or FAlSE
TRUE
Indentify in writing the.common operator errors
TX/RX Frequencies- operators to flip these frequencies unintentionally. Data Rate- incorrect dat rate settings Timing- incorrect timing setting is another common problem between LRS terminals.
Identify the components of the MRC 142C
The system is comprised of three transit cases. Transit case 1- baseband unit AM-1729 BBU, 1 CV-HTU-16M, 1 KYB-7 Buffer. Transit case 2- baseband unit, CV-HTU-16M. Transit case 3- 1 VT-100, 2 CV-FOM-D, 1 TAC-300.
