Self Test

Front 1

801.1 State the purpose of the reference frequency oscillator.

Back 1

To generate a frequency used to control timekeeping of the internal clocks in ECCM components, which in turn enables frequency hopping.

Front 2

801.2 Match the mode of operation.
1.hf-ssb a an/vrc-92
2.vhf-fm b. an/vrc-83
3.vhf-am c. an/urc-113
4.uhf-am

Back 2

1.C
2.A
3.B
4.B

Front 3

802.1 What part of the RT-1319/URC accomplishes tuning of the main receiver?

Back 3

The data converter

Front 4

802.3 What happens in the event of overheating in the RT-1319/URC during high power operation?

Back 4

Output power is reduced to 2 watts.

Front 5

802.3 What is the purpose of the reflectometer?

Back 5

It develops forward and reflected power samples that are returned to modulator circuits to maintain a constan carrier output level and percentage of modulation.

Front 6

802.4 In the display and control circuitry, what happens if the source voltage drops below +20 Vdc.

Back 6

A lo-battery signal from the power supply is sent to the microprocessor in the data converter.

Front 7

803.1 List the five functional modules contained within the AN/URC-113 RT unit.

Back 7

Control panel, synthesizer, modulator/dimodulator, harmonic filter and power supply.

Front 8

803.2 State the functions of the AM-7148.

Back 8

Impedance matching, amplification, fault sensing, and faulty assembly identification.

Front 9

803.3 What determines synthesizer frequency output?

Back 9

Mode of operation

Front 10

804.1 What equipment is considered the heart of the entire antenna system?

Back 10

The RFSM

Front 11

804.2 For how many receivers can each OCU select the RF beam?

Back 11

16

Front 12

804.3 What is the purpose of the goniometer?

Back 12

To simulate antenna rotation.

Front 13

805.1 What is the purpose of the antenna array's two reflecting screens?

Back 13

The screens funtion as reflectors to increase the power gain of individual antenna elements and to aid in the formation of specific beam patterns.

Front 14

805.2 Describe the purpose of the ground screens.

Back 14

The ground screens help to stabilize antenna element impedance characteristics and provide uniform impedance from element to element, regardless of the variation in the electrical properties in the soil.

Front 15

805.3 By what method do signals travel from the central building to the operations building?

Back 15

Via a cable tunnel.

Front 16

806.1 Describe the dual processor cancept utilized in the RFSM.

Back 16

The second processor unit continually monitors the first processor unit for malfunctions. In the event of a failure in the first processor unit, the second processor unit assumes system control.

Front 17

806.2 What is the purpose of the RFSM control subsystem?

Back 17

To provide the necessary computer-assisted functions for the RFSM system.

Front 18

806.3 List the subsystems tested during BITE operation.

Back 18

Multicoupler subsystem, matrix subsystem, and DF subsystem

Front 19

806.4 What is the purpose of the ID MUX?

Back 19

To provide an interface between the RFSM control subsytem and the OCU's.

Front 20

806.5 What item does the operator use to select the azimuth of an RF signal to be sent to a particular receiver?

Back 20

The operator control unit (OCU).

Front 21

807.1 Identify the two major assemblies of the ETVS.

Back 21

Communications console and central equipment

Front 22

807.2 Where are the maintenance position located?

Back 22

At the central equipment racks

Front 23

807.3 What capabilities can be provided at the maintenance position?

Back 23

The same as any operator position

Front 24

808.1 What is the primary operator-control mechanism?

Back 24

The TED

Front 25

808.2 How is position to frequency programming accomplished?

Back 25

Via the SCT

Front 26

808.3 Is system fault location desplayed on the SCT's display?

Back 26

True

Front 27

808.4 What type of link does the system use to pass card status and switchover control between reduntant radio processor cards?

Back 27

RS-232 link

Front 28

809.1 What is the purpose of the central equipment processor cards?

Back 28

To provide central equipment interface

Front 29

809.2 What is the purpose of the DA and IA controls?

Back 29

To establish telephone communications.

Front 30

809.3 How does an operator initiate communications for a radio channel?

Back 30

Via a key-press on the TED

Front 31

809.4 In what form does microphone audio travel to the equipment rack during transmit?

Back 31

In digital form

Front 32

809.5 State the functions of the CCS

Back 32

To disignate operator position functions and system configuration.

Front 33

810.1 How is DRU record and playback controlled?

Back 33

With the computer workstation

Front 34

810.2 State the purpose of the NiceLog Software Suite?

Back 34

To manipulate various features within the system.

Front 35

810.3 In the event of a power failure, how long will the UPS power the system?

Back 35

Five minutes

Front 36

811.1 What is the recording capacity of each DAT in the DVRS?

Back 36

500 linear hours

Front 37

811.2 What is the source of time of day for recording time stamp purposes?

Back 37

A GPS receiver

Front 38

811.3 Which CCA in the DRU digitizes the audio?

Back 38

The audio interface (ADIF)

Front 39

811.4 When is information on the hard disk deleted?

Back 39

When the software determines that particular audio is the oldest audio on the hard disk and the hard disk is full.

Front 40

812.1 Define the term Sounding?

Back 40

The process of transmitting a signal on a frequency used by other stations to determine that channel's usability.

Front 41

812.2 State the purpose of Link Quality Analysis?

Back 41

To determine a particular frequency's signal quality.

Front 42

812.3 What designation is given a station that has an address that is not programmed into your station's other address table?

Back 42

Floating address.

Front 43

813.1 Name the three sites that comprise a SCOPE Command remote station?

Back 43

control site, receive site, transmit site.

Front 44

813.2 What is the output power at the transmit site?

Back 44

4000 watts

Front 45

813.3 How many stations exist in the SCOPE Command HFGCS?

Back 45

14

Front 46

813.4 Give an advantage of using HF communications for E-mail

Back 46

The spectrum is always available wheras satellites tend to be busy during a crisis.

Front 47

814.1 State the three steps of ALE linking?

Back 47

Call, response, acknowledge

Front 48

814.2 Name the protocal used for all communications between SCOPE Command software processors.

Back 48

TCP/IP.

Front 49

814.3 What are the only audio-related circuits that do not terminate in the digital electronic switch?

Back 49

Key-line and inter-site modems.

Front 50

815.1 What RT-2200 subassembly performs all HF mode modulation, demodulation, and ALE modem processing?

Back 50

Digital signal processor

Front 51

815.2 What controls scanning receiver operation?

Back 51

RS-422 interface data from the SCOPE command software server.

Front 52

815.3 What is the channel-hour capacity of the removable disks in the digital recorders?

Back 52

650 channel-hours

Front 53

816.1 What do we use the initial RF loop-back test to establish?

Back 53

To establish baseline values

Front 54

816.2 Does the RF loop-back test determine the system's performance while communicating with a distant station?

Back 54

No

Front 55

816.3 When initiated, how many times is an RF loop-back test actrually ran?

Back 55

Three times

Front 56

817.1 State the purpose of DAMA.

Back 56

to allocate and share satellite bandwidth on a demand assigned basis

Front 57

817.2 Who may function as a network control station?

Back 57

Any unit with the required hardware and software.

Front 58

817.3 State the frequency range in which the PSC-5 can operate in DAMA mode.

Back 58

225-400 MHz

Front 59

818.1 What is the reference frequency for the 1st synthesizer loop?

Back 59

200 kHz

Front 60

818.2 Which AN/PSC-5 module performs BIT functions?

Back 60

The controller module

Front 61

818.3 State the purpose of the COMSEC module's INDICTOR chip.

Back 61

It performs voice and data encryption

Front 62

819.1 During preselection/amplification, what is the purpose of the digitally controlled potentiometers?

Back 62

Developing the tuning voltage and squelch level

Front 63

819.2 In AM receive mode, what generates the AGC voltage?

Back 63

The AM detector

Front 64

819.3 What provides RF selectivity for receive operations?

Back 64

A varactor tuned front end.

Front 65

820.1 How is information that is received on the SLFCS displayed?

Back 65

On the HA VDU

Front 66

820.2 Name the two systems that utilize the hard UHF transmit and receive antenna

Back 66

UHF voice and AFSATCOM

Front 67

820.3 Which of the missile communications system antennas is buried?

Back 67

The SLFCS antenna.

Front 68

821.1 The RMPS enables monitor and control of what three systems?

Back 68

SLFCS, AFSATCOM, and SACDIN

Front 69

821.2 State the purpose of the AFSATCOM control indicator.

Back 69

Operator interface

Front 70

821.3 What is used as the transceiver unit in the UHF communications system?

Back 70

The RT-980/GRC-171.

Front 71

821.4 What is the Minimum output power of the UHF system?

Back 71

100 watts

Front 72

822.1 What produces EMP?

Back 72

Nuclear explosions

Front 73

822.2 What is the relationship between EMP damage susceptibility and circuit complexity?

Back 73

Vulnerablility to EMP increases with electronic complexity

Front 74

822.3 What requirements must be met for the demodulator to provide data deciphering of encrypted signals?

Back 74

wrong

Front 75

823.1 What are the two basic units of the AN/FRR-97

Back 75

The antenna assembly and the recfeiver group.

Front 76

823.2 What is the operating frequency range of the SLFCS?

Back 76

VLF/LF, 14-60 kHz

Front 77

823.3 What requirements must be met for the demodulator to provide data deciphering of encrpyted signals?

Back 77

The receiver site must be time-synchronized with and use the identical key as the distant transmitter.

Front 78

823.4 What two components make up the REACT console?

Back 78

The RMPS and the HA VDU.

Front 79

824.1 What does the term ICOM indicate?

Back 79

The term ICOM indicates integrated COMSEC capability.

Front 80

824.2 Which section of the RT-1523 is responsible for modulation and demodulation.

Back 80

The RF section

Front 81

824.3 State the purpose of the interleaver during receive.

Back 81

Removal of synchronization and frequency hopping information that is embedded in the signal.

Front 82

825.1 How many different impedance bands are contained in the impedance matching network?

Back 82

4

Front 83

825.2 Which band of the impedance matching network is used if a BNC-type connector is connected to the RT?

Back 83

The 50 ohm band

Front 84

825.3 State two conditions which will cause the SIDETONE DISABLE line to be set to logic level 1.

Back 84

Temperature exceeding 105C or VSWR exceeding 5:1

Front 85

826.1 Name the 3 items used to select frequency from the look-up table during FH mode.

Back 85

The TRANSEC variable, FH sync time (TOD), and net ID number.

Front 86

826.2 Where does the control module obtain instructions during remote operation?

Back 86

The control module executes intructions from the remote I/O module during remote operations.

Front 87

826.3 Which RF section module performs modulation of the carrier?

Back 87

The exciter/power amplifier.

Front 88

827.1 What component controls the level of two or more inputs?

Back 88

The mixer

Front 89

827.2 What component might be needed if audio were distributed to several amplifiers? What wold this prevent?

Back 89

A distribution amplifier might be needed Its use would help to prevent signal loss.

Front 90

827.3 State the difference between RMS power and peak power in terms of speaker specification.

Back 90

RMS power denotes the wattage the speaker can handle on a continuous basis while peak power denotes the wattage it can handle on an intermittent basis.

Front 91

828.1 Name the three configurations we use to connect speakers to an amplifier.

Back 91

Series, parallel, and series-parallel.

Front 92

828.2 What is the result of an impedance mismatch between an amplifier and speakers?

Back 92

An impedance mismatch causes distortion

Front 93

828.3 If your amplifier offers 4, 8, and 16-ohm outputs, which one provides an exact impedance match for four 16 ohm speakers connected in parallel?

Back 93

The 4 ohm output(4=16/4)

Front 94

828.4 What is the result of connection too many speakers in parallel?

Back 94

Loss of power capability

Front 95

828.5 State teh disadvantage of using a 70 volt, constant voltage speaker connection

Back 95

Volume is limited

Front 96

828.6 Name the three most common sound system connectors.

Back 96

Phone connector, phono connector, and XLR connector.