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34 Cards in this Set
- Front
- Back
Electrical energy used by
electronic communication travels at what rate? |
Speed of light
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What is/are the major
disadvantage(s) of radiotelegraph? |
Slow speed and the need for
experienced operators at both ends |
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What frequency bands were
originally used for radiotelegraphy? |
VLF and LF
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What frequency bands have the
prominent feature of ionospheric reflection? |
VHF and UHF
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VHF and UHF bands are known as what
type of transmission band? |
Line of Sight
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Which of the following functions is performed by the IRC panel?
|
Controls UHF radio modes and
functions Controls HF radio modes and functions. Displays IFPM status of communication subsystems and components |
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The BITE indicator on the IRC panel
will illuminate when a fault is detected in the |
This indicator will illuminate when a
fault is detected in the IRC. |
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The LS-601/AI crew control panels
are all identical and operate the same at each station. TRUE OR FALSE |
TRUE
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Which of the following control(s)
is/are located on the LS-602/AI control panel? 1. Radio select only 2. ICS select only 3. Volume control only 4. Radio select, ICS select, and volume control |
3. Volume control only
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What is the interrogation rate for
each crew ICS panel and IRC by the change-of-status request from the SLU? |
Every 25 milliseconds, each crew panel and the IRC are
interrogated for a change-of-status by the SLU. |
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What will the S indicator
illumination on the crew control panels indicate for a particular radio system? |
The S indicators on the crew panels will
illuminate red when the secure mode of operation is selected for that particular radio system. |
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In the ICCG, which of the following
components does NOT have identical binary coding and decoding circuits? 1. SLU 2. IRC 3. LS-601/AI 4. LS-602/AI |
4. LS-602/AI
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What binary number is recognized by
the SLU as the pilot crew ICS panel in bits 2 through 6 of the 36-bit format? |
One
example of this is that the SLU recognizes the binary number 01010 as the pilot crew ICS panel. |
|
What is bit 36 of the 36-bit format
used for by the ICCG? |
Bit 36 is the parity bit used for self-check in the
binary circuitry. |
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In the Manchester word format, what is
the clock pulse rate? |
120 kHz
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What component generates the roll
call for the communication system? |
The crew ICS panels
and the IRC have unique binary word addresses that are identified by a roll call sequence performed in the SLU. |
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The exhale word is a status word
between the SLU and what component(s)? |
the exhale
word is a status word Between the GPDC and the SLU, the exhale word is also a status word. |
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Which ICCG component recognizes and
processes the first part of roll call 1 through the digital control section, line receiver, and inhale word register? |
The IRC is the only ICCG component
that recognizes roll call 1, and it processes the roll call through the digital control section, line receiver, and inhale word register. |
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Which ICCG component generates the
second part of roll call 1? |
The second part of roll call 1 is generated in the IRC.
|
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Where are the data and clock pulses
separated in the SLU? |
Inhale word register
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Which components in the ICCG
respond to more than one roll call address? |
The IRC and
components that respond to the SLU are the only more than one roll call |
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What circuit in the SLU is used to
shift data from one buffer to another once the data is shifted to the input register in the SLU? |
Once the data is shifted to the input
register, the master clock is used to shift the data from one buffer to another. |
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What happens in the SLU if the input word is invalid three times?
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If the input word is invalid three
times, the status register sets the BITE indicator on the component that sent the word. |
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When does the IRC/SLU roll call exchange end?
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The IRC/SLU roll call exchange ends with the first
part of roll call 8. |
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Which crew ICS panel process the first part of roll call 9?
|
When the first part of roll call 9 is on the
multiplex line, it is recognized by the TACCO crew ICS panel, |
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What is the frequency range of the AN/ARC-197 VHF transceiver?
|
Its actual frequency range is from 116.000 to 151.975 MHz.
|
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How many preset channels are available with the
AN/ARC-187 radio set? |
20
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What fault is indicated when the fault indicator
on the C-11950/ARC-187 control box flashes at a slow rate? |
interface fault
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The HF-2 long-wire antenna has degraded
operation at which frequencies? |
The HF-2 antenna has two degraded frequency
ranges where coupling might not be possible: 7.9000 to 9.1000 MHz and 18.9000 to 20.1000 MHz. |
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What is the purpose of the lightning arrester used
in the HF system? |
The lightning arrester provides a spark
gap to protect the radio if lightning strikes the long-wire antenna. |
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What radio sets can be used with the data link
system? |
Either HF-1,
HF-2, or UHF-2 may be used to transmit and receive data link. |
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Who has primary responsibility for the hardware
setup of the data link system? |
The NAV/COMM has primary responsibility for the
hardware setup of the data link system |
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Which unit in the TTY system provides the
interface with the radios? |
TTY signal data converter
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Which unit connects the TTY system with the
central computer? |
Communications interface No. 1
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