3D1X3 Self Test Questions Vol. 2 Unit 5

Front 1

What is automatic link establishment?

Back 1

A means of automatically establishing an HF link between two or more stations with minimum operator
inputs.

Front 2

What are the two major differences between conventional HF and ALE HF communications?

Back 2

(1) ALE lets you call one station in a ALE net selectively without disturbing the rest of the net.
(2) The ALE system automatically chooses the best frequency (from a preprogrammed list) for a call
under the conditions at that time.

Front 3

How many alphanumeric characters are used in most ALE addresses?

Back 3

Most ALE addresses consist of three alphanumeric characters, even though addresses up to 15 characters
long may be used.

Front 4

What happens if a link attempt is not successful on the first channel selected, or if the channel is
busy?

Back 4

If a link attempt is not successful on the first channel selected, or if the channel is busy, alternative channels
are selected automatically.

Front 5

What is an individual call?

Back 5

The individual call (station-to-station call) is intended to establish a two-way communication link between
two ALE stations on a single, automatically selected channel.

Front 6

Differentiate between a group call and a net call?

Back 6

Unlike net calls, which require prior coordination by a network manager, group calls let you contact a
group of stations when you know only the self address and scan list.

Front 7

Define the term “sounding.”

Back 7

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

Front 8

State the purpose of link quality analysis.

Back 8

To determine a particular frequency’s signal quality.

Front 9

What does sounding contain?

Back 9

They contain station identity information for use by other stations to “rank” this channel among all channels
on the scan list.

Front 10

Describe an AN/PRC–150 Manpack radio?

Back 10

The AN/PRC–150(C) is an advanced HF radio which operates from 1.6 MHz to 29.9999 MHz using sky
wave (USB, LSB, CW, AME) modulations with selectable low (1.0 watt), medium (5.0 watts), and high
(20.0 watts) output power. The AN/PRC–150(C) also operates from 20.0000 MHz to 59.9999 MHz in FM
with maximum power of 10.0 watts. Communications can take place with manpack, mobile, and fixed-site
radio configurations.

Front 11

Where are all functions of the radio controlled from?

Back 11

All functions are controlled from the front panel and KDU, or via a remote control device.

Front 12

What does the ALE phone call features allow?

Back 12

The ALE phone call features allow the radio to call and link to an “HF Ground Station” capable of patching
voice calls to a Public Service Telephone Network (PSTN) landline or similar communications network.

Front 13

What common transmission technique does the AN/PRC–150 use?

Back 13

It uses a common transmission security technique called frequency hopping.

Front 14

What type of antenna comes with AN/PRC–150 radio?

Back 14

The OE–505 manpack whip antenna kit provided with the radio is 3.1 meters long and consists of six
collapsible sections.

Front 15

What is required to operate in medium-range communications along with the AN/PRC–150?

Back 15

The AN/PRC–150 along with an RF–5834H-PA power amplifier can increase power to a 400-watt
capability. It operates in applications where medium-range communications are required.

Front 16

Where are the impedance matching circuits located?

Back 16

The signal then passes through an impedance matching circuit in A3A5 Antenna Coupler Assembly.

Front 17

Where do the received audio signal digital data signals exit?

Back 17

Via J1 AUDIO connector, or a digital data signal exits the radio via J3 DATA connector.